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Industrial POL
Buck controller (Internal MOSFET)
Buck converter (external MOSFET)
Other topologies (Boost, Sepic, buck-boost)
Industrial Power Block Diagram
Off-Line(AC)
Bus
(12/24/48V)
5V USB
Battery
Inputs
DC/DC
Converter
Controller
& NEXFET
LDO
Power
Switch
Modules
Isolated
Converter
Hot Swap
Loads
LogicDSP &
FPGA
MSP430
& Stellaris
Sensor
Data
Converter
Op Amp
LCD/LED
Display
Motor &
Relay
Charger
DC/DC
Protection
Battery
Management Memory Interface
AC/DC
Flyback
Power Supply System Requirements
Vout /Iout
min/max
noise/dynamics
Vin
min/max
Power
SourcePower
Supply
System
closed loop
Load Current
dynamics,
transients
Output Voltage
Noise / Ripple
Line/Input
Voltage
dynamics,
transients
t
V dV
Footprint Efficiency/ThermalBOM cost
Load: CPU, FPGA, Bulb, DSP,
ADC, Sensor,other
110/220 VAC
4.2V-3.0V
Integration Technology Evolution
External
FET
Controllers
DCDC Controllers (with Ext
FETs) used for ALL
DCDC applications
Integrated
FET
Converters
DCDC Converters (with Int
FETs) used for as many
DCDC applications as
possible
Integrated
Power
Solutions
Today FutureIPS beginning of the
evolution seen with
Integrated FETs several
years ago
Synchronous vs Non Sync
Non-Synchronous Buck
Synchronous Buck
Non-synchronous1. Diode voltage drop is fairly
constant with output current
2. Less efficient
3. Less expensive
4. Used with higher output
voltages
Synchronous1. MOSFET has lower voltage
drop
2. More efficient
3. Requires additional control
circuitry
4. Costs more
Q1L
C0D1
Q1L
C0Q2
Feedback ControlVoltage Mode
• Use when synchronized / fixed switching frequency is needed. Better for higher
duty cycles than current mode.
Voltage Mode with Voltage Feed Forward
• Input Voltage changes – Useful in Automotive, Battery Back up.
Current Mode
• Synchronized / fixed switching frequency is needed with lower parts count. Fast
transient response when fixed frequency is needed.
Emulated Current Mode
• Low duty cycles versus traditional current mode, without current noise susceptibility.
Hysteretic
• Low cost – Few parts count. Fast transient response. Frequency not critical.
DCAP, Constant On Time
• Fast transient response when using POSCAP or medium ESR Cout. Reduced parts
count.
DCAP2, Constant On Time with Emulated Ripple Mode
• Fast transient response when using ceramic Cout. Reduced parts count.D-CAP+
• Fast transient, reduced parts count in multi-phase and high accuracy Vout
DCS (Direct Control w/ Seamless transition to Power Save Mode)
• Light load efficiency is needed, fast transient response, reduced parts count.
Buck Controllers
Industrial DC/DC ControllersStep-Down Controllers
Ou
tpu
t C
urr
en
t (I
OU
T)
Input Voltage (VIN)8 40 524.5 10 60 1006 13
TPS40055/57 - Voltage Mode w/ Feed Forward
LM5117 / LM25117 – Emulated Current Mode
LM5116 / LM25116 – Current Mode
LM5119 / LM25119 – Current Mode, Dual Channel
55 805.5
LM3150/1/2/3 – Constant On-Time
TPS40200 - Voltage Mode w/ Feed Forward
TPS40170 - Voltage Mode w/ Feed Forward
42 65
LM5088 and LM25088 – Emulated Current Mode
75
LM5085 and LM25085 – Constant On-Time
Synchronous
Non-Sync
5A
10A
15A
20A
30A
40A
50A
LM27402 - Voltage Mode
LM3485 – Hysteretic PFET Control
TPS40170 4.5-60V Wide Input Synchronous Buck Controller
0.600V Reference (1% accuracy)
100kHz - 600kHz Programmable Frequency
Voltage Mode Control - Input Feed-
Forward
Bi-directional Frequency Synchronization
with Master/Slave option
Programmable over-current and selectable
short-circuit protection
Voltage Tracking
Point-of-load modules and converters
Merchant power, Industrial, Automotive
Datacom, Telecom equipment
Performance processors DSPs, ASICs
Accurate Vout regulation
Optimize for small duty cycle or size
Fast system response to line transients
Eliminates beat noise and up to less 50% input
capacitance required
Optimization of power stage components
Support all sequencing scheme to control inrush
currents
GND
VIN
SYNC VIN
HDRV
SW
BOOT
LDRV
PGND
VBP
ILIMAGND
VDD
SYNC
SS
M/S
RT
TRK
COMP
VOUT
UVLOENABLE
FB
PGOOD
ENABLE
19
201
18
17
16
15
14
13
12
2
3
4
5
6
7
8
9
10 11
M/S
TRK
TPS40170
•TPS40170EVM-578
•SwitcherPro™ tool20 pin 3.5mmx4.5mm QFN
Voltage Mode Control
ADVANTAGES
• Single feedback loop
• Good noise margin
• Voltage regulation is
independent of current
DISADVANTAGES
• High BW EA required
• More difficult double-pole
compensation
• Output caps affect
compensation
• VIN affects loop gain
Ton
CLOCK
LATCHOUTPUT
EAREF
VOUT
PWMCOMP
VE
OSC
VR
CLOCK
VIN
VE
VR
+
VOUT
R Q
S
Voltage Mode w/ Voltage Feed-Forward
Ramp Generator Circuit
• Varies the PWM ramp with
line voltage
• Maintains constant ramp
magnitude
• Excellent response to line
variations
• PWM does not have to wait
for loop delays to change
the duty cycle
• Useful when input voltage
varies
EAREF
VOUT
PWMCOMP
VE
OSC
VRamp
CLOCK
VIN
+
VOUT
R Q
SRKFF
VE
EVM PART # LM5119EVAL/NOPB
Dual or Single Multiphase Configuration
Wide Vin Range: 5.5V to 65V (LM5119),
4.5V to 42V (LM25119)
3.3A Gate Drive Supports 20A/Channel Loads
Emulated Current Mode (ECM) Operation
Programmable from 50 kHz to 750kHz
Diode Emulation Mode (DEM) increases light
load Efficiency
Automatic switch over to external bias
Programmable current limit, soft-start, and
under-voltage lockout
LLP-32 (5x5mm)
Multiphase outputs decrease capacitance, reduce BOM cost and increase power density
Wide operating range allows step-down from HV
rails without the need for a transformer
ECM enables stable high step-down ratios
Low Iq, diode emulation, and external bias enable
high efficiency at light loads and in standby
LM5119/LM2511965V/42V Dual Channel, Multiphase Synchronous Buck controllers
Automotive Infotainment
Industrial DC-DC motor drivers
Automotive USB accessory adapters
Telecom: Servers, routers
Diode Emulation Mode
• Sync Buck– Light load efficiency is
not good
– Reverse current through the low-side MOSFET.
• Non-Sync Buck– Light load efficiency is
good.
– No reverse current at light load.
Q1L
C0D1
Q1L
C0Q2
Current Mode Control
ADVANTAGES
• Fast response to output
current changes
• Single-pole compensation
• Inherent current limiting
• Inherent feed forward
• Multiple phase current sharing
possible
DISADVANTAGES
• Two feedback loops if a
current amplifier is used
• Need for slope compensation
• Current limit “tail”
• Noise sensitivity due to
leading edge current spike
EAREF
VOUT
PWM
COMPV
E
VIN
+
VOUT
R Q
S
CLOCK
VE
VS
LATCHOUTPUT
CLOCK
VS
RCS
-VIN
Ton
Current Ramp
Emulated Current Mode Control
Inductor current is EMULATED by:
• Measuring inductor voltage and
estimating current ramp
• Measuring diode current
Vin
VoutVin - Vout
25uA5u x (Vin - Vout)
A = 1
ON
CONTROL
TIMING
SAMPLE
&
HOLD
RAMP SIGNAL FOR PWM
AND CURRENT LIMIT
0.5 V/ A
CRAMP
Rs
Vin Vout
Is
RAMP
Q1
D1
L1
dv/dt = (Vin - Vout) / CRAMP
di/dt = (Vin - Vout) / L1
Sample and Hold
DC Level
TON
RAMP
500ns
Tsw
Tsw - 500ns
Sample and Hold
• A forced off-time of 500ns is implemented each
cycle to allow time to sample and hold diode or
sync switch current.
Wide Operating Range of 6Vin to 100Vin
(LM25116 up to 42V)
Programmable Output from 1.215V to 80V
(LM25116 programmable up to 35V)
Emulated current mode (ECM) Operation
3.5A Peak Gate Drive Capable of 20A Loads
Low IQ shutdown: <10uA
Diode Emulation Mode increases light load
Efficiency (DEM)
Automatic switch to external bias supply
Programmable current limit, soft-start, and
under-voltage lockout
eTSSOP-20
Wide operating range allows step-down from HV
rails without the need for a transformer
ECM enables stable high step-down ratios
Low Iq, diode emulation, and external bias enable
high efficiency at light loads and in standby
LM5116/LM25116100V Wide Range Synchronous Buck Controller
FB
VIN VCC
RT/SYNC
VIN
HB
EN L
CHB
CVCC
LM5116
COMP
AGND
CSG
RAMPSS
CIN
COUT
CS
PGND
LO
VOUT
HO
SW
UVLO
VIN
VCCX RFB2
RFB1
RS
CSS
CCOMP
RCOMP
CHF
RT
VOUT
RUV2
RUV1
DEMB
CRAMP
CSYNC
Automotive Infotainment
Industrial DC-DC motor drivers
Automotive USB accessory adapters
Telecom: Servers, routers
EVM PART # LM(2)5088MH-1EVAL
Wide Vin Range : 4.5V to 75V (LM5088),
4.5V to 42V (LM25088)
Programmable Output from 1.21V to 70V
(LM25088 1.21V to 40V)
Spread spectrum EMI reduction (LM5088-1)
Hiccup timer for overload protection (LM5088-2)
High duty cycle for reduced dropout voltage
Capable of 10A outputs
1.5% feedback reference accuracy
Programmable switching frequency up to 1 MHz
Low IQ and Standby modes
eTSSOP-16
Wide operating range addresses high voltage
automotive and industrial applications
Spread spectrum reduces EMI allowing better
performance in sensitive environments
Low IQ and Standby modes allows applications to
increase efficiency when the device is not in use
AEC-Q100 Grade 1 qualified
LM5088/LM2508875V/42V Wide Input Range NFET Buck Controllers
Automotive Infotainment
Industrial DC-DC motor drivers
Automotive USB accessory adapters
Telecom: Servers, routers
Spread Spectrum – Clock Dithering
• Intentionally changing the
switching frequency
– Spreads the noise over many
frequencies
– Reduces peak amplitude of
emisssions
– Easier to pass emissions
testing
– Can be implemented on IC
with a sync function
EVM PART # LM(2)5117EVAL
Wide Vin Range : 5.5V to 65V (LM5117),
4.5V to 42V (LM25117)
Emulated Current Mode (ECM) control
0.8V + 1.5% feedback reference
Current monitoring output (IOUT)
Adjustable output from 0.8V to 0.9*Vin
Drives standard or logic level MOSFETs
Low 15uA shutdown mode quiescent current
Synchronizable switching frequency to 750KHz
Programmable soft-start or voltage tracking
Package: TSSOP-20 and LLP-20
Wide operating range addresses high voltage
automotive and industrial applications
Analog telemetry provides average output
current information
Low Shutdown IQ offers increased efficiency when
the device is not in use
LM5117/LM2511765V/42V Wide Input Range Buck Controllers
Automotive Infotainment
Industrial DC-DC motor drivers
Automotive USB accessory adapters
Telecom: Servers, routers
HO
SW
LO
CS
FB
HB
VIN
VIN
COMPRT/SYNC
RAMP
SS/TRK
AGND
UVLO
PGND
VOUT
VCCDIS
RES
IOUT
DEM
VCC
PGOOD
LM5117
TPS40055/578-40V Input Synchronous Buck Controllers
0.7 volt 1.0% reference
Programmable Frequency 150kHz to
1MHz
Drives upper and lower N Ch. MOSFETs
Programmable soft start
Sync pin
Voltage mode control with input feed
forward
16 pin TSSOP PowerPAD™
Point-of-load regulation for DSPs, FPGAs,
ASICs off 12/24V bus
Base stations, broadband, networking, &
optical comm.
Industrial systems
2
3
4
5
1
6
7
8
15
14
13
12
16
11
10
9
TPS40050PWP
KFF
VIN
ILIM
COMP
VFB
SS
SGND
SYNC
BP5
RT
PGND
LDRV
BP10
SW
HDRV
BOOST
VIN
+
-
VOUT
+
-
TPS40057
Part Number Attribute
TPS40055 Source/sink
TPS40057 Source/sink w/pre-biasEVM/Tool
TPS40055EVM-001 (15-A)
TPS40055EVM-002 (2-A)
SwitcherPro design tool
Supports advanced processors
Small LC filter and low duty cycle
operation supports low Vout / high Vin
High efficient synchronous rectification
Reduces inrush currents
Eliminates beat noise
Tight output voltage regulation over wide
input voltage variations
Thermally enhanced packaging
EVM/Tool
LM31506V to 42V Input Synchronous Step-Down Controller
• Easy to Use Constant On-Time
Architecture Reduces Component Count
• Emulated Ripple Mode Control Allows
Low ESR Capacitors
• Programmable up to 1000kHz Operation
• Provides up to 12A Output Current
• 2% Vref Accuracy (0.6V)
• LM3150-250EVAL
• WEBENCH Tool
• Telecom and Networking Equipment
• Routers and Security Surveillance
• Power modules
• No Loop Compensation Components and
Very Fast Transient Response
• Saves Board Space and Reduces Voltage
Ripple
• Optimize for High Efficiency or Small Size
• High Output Current Capability
• Powers Low Voltage Processors
14 pin HTSSOP
Buck Converter (Internal MOSFET)
Industrial Integrated FET DC/DC ConvertersStep-Down Converters > 42V Input
0.5AOu
tpu
t C
urr
en
t (I
OU
T)
Input Voltage (VIN)
1A
1.5A
2.5A
3A
TPS54060
3.5V 4.5V 5.5V 36V 42V 75V6.0V
LM5010A
60V
TPS54160
LM5575
TPS54260
LM5576
TPS54062
100V
LM5009A
50mA
150mA
LM5008A350mA
Synchronous
Non-Sync
LM5574
LM5007
LM5006
LM5005
LM5017 NEW!
LM5017EVAL, LM5017ISOEVAL
Input voltage range: 9V to 100V
Integrated HS and LS FETs
Constant On-time (COT) architecture
Switching frequency adjustable to 1MHz
600mA/300mA/100mA output current levels
Integrated Input under-voltage lock-out
Ultra-fast transient response
Output adjustable to 1.22V
Precision reference, ± 2.5%
Peak current limit protection
Thermal shutdown
PSOP-8, LLP-8 packages
Transient protection with no clamping circuitry
50% BOM reduction compared to controller
No external loop compensation
Smaller magnetics
Non-Isolated and Isolated 48V
Telecommunications
High Voltage Industrial
Automotive Battery Management
LM5017/18/19Industry’s First 100V Synchronous Buck Regulator Family
10 fewer components than leading competitor when used as
isolated bias supply
Constant-On-Time (COT)
TON - Terminated by On-Timer
TOFF - Terminated by VFB < VREF
VOUT
IOUT
GND
VREF
+-
SW
IL
VFB
VREF
VFB
VIN
VOUT
TON TOFF
VIN
ON
Timer
RON
COT Fast Transient Response
• COTs have no error amplifier and compensation to limit the
bandwidth
• This results in very fast response to load/line transients.
Fast Response
Load Current
Inductor Current
VOUT
Zoomed
EVM PART # LM5005EVAL
7V to 75V Operating Input Voltage Range
(LM25005 up to 42V)
Integrated 75V N-channel Buck Switch
2.5A Output Current
Emulated Current Mode control
Adjustable Output Voltage From 1.225V
Internal Start-up Regulator
Fast Transient Response
FSW programmable from 50kHz to 500kHz
Frequency synchronization input
Package: TSSOP 20 EP (exposed pad)
Achieves very small duty cycle to convert from
high input voltage to low output voltage
Single stage high voltage conversions improve
efficiency, cost and reduce board space
Non-Isolated Telecom Buck Regulator
42V Automotive Systems
High Voltage Secondary Side Post
Regulator
LM5005/LM2500575V, 2.5A Buck Switching Regulator
LM5574EVAL
LM5575EVAL
LM5576EVAL
Ultra-wide input range from 6V to 75V
Integrated 75V, 170mΩ N-channel MOSFET
Operating frequency adjustable between 50kHz
and 500kHz with single resistor
Master or slave frequency synchronization
Adjustable soft-start
Emulated current mode control architecture
eTSSOP-16 package (LM5574/5) or eTSSOP-20
package (LM5576)
Output current options of 0.5A (LM5574), 1.5A
(LM5575), or 3.0A (LM5576)
AECQ100 Grade 1 and 0 Qualified
Flexible to support 12V, 24V, and 48V rails
Can be optimized for efficiency or solution size
Will self synchronize when connected to other
regulators
Supports rapid transient performance and low
noise
Fully WEBENCH® enabled
High voltage applications
Industrial, medical, and military power supplies
Communication and infrastructure equipment
Automotive
LM5574/5/66V to 75V SIMPLE SWITCHER® Buck Regulators
• Integrated 200m High Side MOSFET
• Pulse Skipping Eco-ModeTM with 138uA
Operating and 1.3uA Shutdown Current
• 100 kHz to 2.5 MHz Switching Frequency
• Synchronizes to External Clock
• Adjustable Slow Start Time
• PG, Enable, and Track Pin
• Greater than 90% Peak Efficiency
• High Light Load Efficiency: Greater than
60% Efficiency at 10mA
• Low Duty Cycle or Smaller L&C Sizing
• Eliminates Beat Noise
• Reduces Inrush Currents
• Implement Various Sequencing Schemes
• Aftermarket Automotive
Accessories
• Smart Metering
• GSM/GPRS Module for Security
Systems, Inventory Management
• 12/24/48V Industrial Systems
TPS54060, TPS54160, TPS542603.5 to 60V Input SWIFT™ Step-Down Converters
TOOLS
TPS54060EVM-457
TPS54160EVM-230
TPS54260EVM-597
WEBENCH® DesignerSame packages are pin to pin compatible
* Preview Status
Part
Number
Iout
(A)Package
TPS54060 0.5 MSOP10
TPS54060 0.5 3x3SON
TPS54160 1.5 MSOP10
TPS54160* 1.5 3x3SON
TPS54260 2.5 MSOP10
TPS54260 2.5 3x3SON
Vo: 0.8V to 57V
Eco-mode™
• Trademarked SWIFT (TPS54xx) converters power saving mode.
• Similar to PFM mode:– skips pulses.
– goes into energy saving, low power sleep mode during the pulse skipping period.
• Eco-mode is activated when COMP pin voltage falls to 500 mV.
Eco-mode™
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
TPS54140
TPS54331
TPS54620
TPS54331 without Ecomode
TPS54140 without Ecomode
Ecomode
Ecomode
TPS540624.7V to 60V Input, 50mA SWIFT™ Synchronous Step-Down Converter
• Fully Synchronous with Integrated
1.5/0.8 Power MOSFETs
• 100kHz to 400kHz Adjustable
Frequency
• 89uA Operating Quiescent and
1.7uA Shutdown Current
• High Efficiency with More than 20mm2
Board Space Savings. No Power Diode
• Synchronizes to Clock to Reduce Noise
in Sensitive Applications
• Improves Light Load Efficiency for Tight
Current Budgets
• Industrial Process Control, Metering,
Security Systems
• 4-20mA Current Loop Powered Sensors
• Low Power Standby or Bias Voltage Supply
• L7805 Linear Replacement
TPS54062EVM-695
Design Calculator Tool8 MSOP or 3x3mm SON Packages
TPS54062 Powering 4-20mA Sensors
Synchronous Buck Converter
Micro-Controller4-20mA Current-
Loop Transmitter
Base
Emitter
IOUT
DACOUTIIN
ADCIN
VCCVIN (V+)
+
Vin Vout
XTR115
MSP430
TPS54062
-Iout
Vloop to
sensors
EN
VIN
RT/CLK
PH
2-Wire Current Loop Application• ADCIN determines how
much current (Iout) to sink:
0% = 4mA
100% = 20mA
• High efficiency, low Iq
synchronous buck converter
allows more current than a
linear to meet current
budget
Faster micro-controller
speeds
Additional circuitry
• Fixed / Synchronizable
frequency of TPS54062
(CLK pin) helps reduce
noise to analog circuitry
~3.5mA budget
(must be <4mA)
Integrated FET DC/DC ConvertersStep-Down Converters ≤ 42V Input
0.5A
Ou
tpu
t C
urr
en
t (I
OU
T)
Input Voltage (VIN)
1A
1.5A
2.5A
3A
5A
TPS54040
3.5V 4.5V 5.5V 36V 42V 75V6.0V 60V
LM22674
LM25010
LM22672
LM3100
TPS54140
LM25011
LM226802A
TPS54240
TPS5430
TPS5450
LM3102
LM31030.75A
100V
Synchronous
Non-Sync
LM25574
LM25575
LM25576
LM25007
LMR24220
Input voltage range of 4.5V to 36V or 42V
0.8V, +/-1.5% Internal reference
Output current of 0.75A (LM3103), 1.5A
(LM3100), or 2.5A (LM3102)
Integrated low RDSon synchronous MOSFETs
for high efficiency
Low component count and small solution size
No loop compensation required
COT architecture
Programmable switching frequency up to 1MHz
Pre-bias startup
eTSSOP packaging
Integrated synchronous MOSFETs provides high
efficiency at low output voltages
COT architecture requires no loop
compensation, reduces component count, and
provides ultra fast transient response
Constant switching frequency
Stable with low ESR capacitors
Point of load conversions from 5V, 12V, and
24V rail
Embedded systems
Industrial controls
LM3100/2/34.5V-42V SIMPLE SWITCHER® Synchronous Buck Regulators
LM3100EVAL
LM3102EVAL
LM3103EVAL
Why Prebias?
Large negative
inductor current
during turn-on
2V of Prebias on
output of supply
Supply pulls output
low at turn-on
LMR24210EVAL
LMR24220EVAL
LMR24210 / 2042Vin, 1.0A/2.0A Synchronous Buck SIMPLE SWITCHER® Nano Regulator
Input voltage range of 4.5V to 42V
Output voltage range of 0.8V to 24V
Output current up to 2.0A
Integrated low RDSon synchronous MOSFETs for
high efficiency
Up to 1 MHz switching frequency
Low shutdown Iq, 25 uA typical
Programmable soft-start
No loop compensation required
COT architecture with ERM
28 bump micro SMD (2.45 x 3.64 x 0.6 mm)
packaging
Fully enabled for WEBENCH® Power Designer
Tiny overall solution reduces system cost
Integrated synchronous MOSFETs provides high
efficiency at low output voltages
COT with ERM architecture requires no loop
compensation, reduces component count,
and provides ultra fast transient response
Stable with low ESR capacitors
Point-of-load conversions from 3.3V and 5V rails
Space constrained applications
Battery powered equipment
Industrial distributed power applications
Power meters
A BIG NO-NO! However……
FB
SW
L1
C2
R1
R2
BST
VCC
C3
C4
D1V
OUT
RON/SD
VIN
InputVoltage
C1
RTNSGND
RON
R3
Load
Distributed capacitance
around the PC board
An external ripple injection
circuit can be used to help
generate a new on pulse
COUT
VOUT
GND
Rr
Cac
C r
R
To FB
R
L1
FB1
FB2
COT Ripple Requirement
COT w/ Emulated Ripple Mode (ERM)
• Patented ERM technology satisfies ripple requirements of COT control:
– Emulated Ripple is coupled internally to feedback comparator from low-side
switch of buck power stage
– No ripple required at regulator output (clean VOUT)
RFB2
RFB1
+
-
Feedback
Comparator
VREF
+
RL
VIN
VOUTL
COUT
One-Shot
Timer
FB
COT Buck Regulator
SW
VSW
I L
Emulated
Ripple
0 V
VREF
Reference
Plus
Ripple
Low ESR for
Low Output
Ripple
EVM PART # LM25011MY-EVAL
6V to 42V Input Voltage Range
Current Limit Adjustable to 2A
Switching Frequency Adjustable to
2MHz
No Loop Compensation Required
Output Voltage Adjustable From 2.51V
Power Good Output
Ultra Fast Transient Response
LM25011A: Low Dropout Operation For
Higher Duty Cycles
Package: MSOP10
High switching frequency allows for small form
factor solution size
2MHz switching frequency avoids radio
interference
Adjustable current limit allows for optimal
inductor size and cost
Off-battery Automotive Infotainment and
Telematics Systems
USB Power Supply
Smart Meters/Power Meters
LM25011A 42V, 2A COT Buck with Adjustable Current Limit
FB
SW
L1
COUT
RFB2
RFB1
LM25011
BSTC
BST
D1
CS
RT
VIN
6V to 42VInput
CIN
SSC
SS
RT
VOUT
SGND
PGD
VPGD
PowerGood
CSG
RS
Part
Number
Iout
(A)
Adj Cur
Limit
Soft
Start
Enable Fsync /
Fadj
EVM
LM22674 0.5
LM22671 0.5 LM22671EVAL/NOPB
LM22675 1.0
LM22672 1.0 LM22672EVAL/NOPB
LM22680 2.0
LM22670 3.0 LM22670EVAL
LM22670INVEVAL/NOPB
LM22673 3.0 LM22673EVAL/NOPB
LM22676 3.0
LM22677 5.0 LM22677EVAL/NOPB
LM22678 5.0
LM22679 5.0 LM22679EVAL/NOPB
Vin range 4.5V-42V
Output current up to 5A
Internally compensated voltage mode control
Precision enable
Fixed frequency of 500kHz, Fadj from 200kHz to
1MHz and frequency synchronization
External soft-start
Adjustable current limit
Stable with ceramic capacitors
PSOP-8 and TO-263 Thin packages
AECQ100 Grade 1 qualified
Low component count enables ease of use, small
solution size, and fast time to market
Supports 5V, 12V, and 24V rails
Optimize BOM for high efficiency or small solution
size
High voltage applications
Industrial, medical, and military power
supplies
Communication and infrastructure
Automotive
LM22670/1/2/3/4/5/6/7/8/9/804.5V to 42V SIMPLE SWITCHER® Buck Regulators
LM25576EVAL
Wide input range from 6V to 42V
Integrated 42V, 170mΩ N-channel MOSFET
Operating frequency adjustable between
50kHz and 1MHz with single resistor
Master or slave frequency synchronization
Adjustable soft-start
Emulated current mode control architecture
eTSSOP-16 package (LM25574/5) or
eTSSOP-20 package (LM25576)
Output current options of 0.5A (LM25574),
1.5A (LM25575), or 3.0A (LM25576)
AECQ100 Grade 1 and 0 Qualified
Flexible to support 12V and 24V rails
Can be optimized for efficiency or solution size
Will self synchronize when connected to other
regulators
Supports rapid transient performance and low
noise
Fully WEBENCH® enabled
High voltage applications
Industrial, medical, and military power supplies
Communication and infrastructure equipment
Automotive
LM25574/5/66V to 42V SIMPLE SWITCHER® Buck Regulators
• Integrated 200m High Side MOSFET
• Pulse Skipping Eco-ModeTM with 138uA
Operating and 1.3uA Shutdown Current
• 100 kHz to 2.5 MHz Switching Frequency
• Synchronizes to External Clock
• Adjustable Slow Start Time
• PG, Enable, and Track Pin
• Greater than 90% Peak Efficiency
• High Light Load Efficiency: Greater than
60% Efficiency at 10mA
• Low Duty Cycle or Smaller L&C Sizing
• Eliminates Beat Noise
• Reduces Inrush Currents
• Implement Various Sequencing Schemes
• Aftermarket Automotive Accessories
• Smart Metering
• GSM/GPRS Module for Security
Systems, Inventory Management
• 12/24/48V Industrial Systems
TPS54040, TPS54140, TPS542403.5 to 42V Input SWIFT™ Step-Down Converters
TOOLS
TPS54040EVM-456
TPS54140EVM-429
TPS54240EVM-605
WEBENCH® Designer
Same packages are pin to pin compatible
Part
Number
Iout
(A)Package
TPS54040 0.5 MSOP10
TPS54140 1.5 MSOP10
TPS54240 2.5 MSOP10
TPS54240 1.5 3x3SON
Vo: 0.8V to 39V
Other Topologies
Various Topologies
7
9
8
10
2
4
5
1 RC
SS
COMP
FB
GDRV
VBP
ISNS
VIN
TP
S40210
VIN
VOUT
Rsense
3 DIS/EN
6GND
7
9
8
10
2
4
5
1 RC
SS
COMP
FB
GDRV
VBP
ISNS
VIN
TP
S40210
VIN
VOUT
Rsense
3 DIS/EN
6GND
7
9
8
10
2
4
5
1 RC
SS
COMP
FB
GDRV
VBP
ISNS
VIN
TP
S4
0210
VIN
Rsense
3 DIS/EN
6GND
Co
BOOST
FLYBACKSEPIC
Many reference designs available on request.
Buck-Boost
Industrial DC/DC Controllers and ConvertersOther Topology (Boost, Buck/Boost, SEPIC, etc)
Featu
res
Input Voltage (VIN)40V 52V3V 60V 75V6V 55V
With FET
Controller
4.5V 42V
LM5002 0.5A - Boost / SEPIC / Flyback
LM5000 2A - Boost
TPS40210 – Boost / SEPIC / Flyback
LM5001 1A - Boost / SEPIC / Flyback
LM5118 – Single Inductor Buck/Boost
LM5020 – Boost / SEPIC / Flyback
TPS55010 Isolated Fly-BuckTM
LM5022 – Boost / SEPIC / Flyback
90V8V
LM2585/6 3A – Boost / SEPIC / Flyback
LM2587/8 5A – Boost / SEPIC / Flyback
TPS55340 5A – Boost / SEPIC / Flyback
EVM PART # LM5118EVAL
Wide Operating Range: 3V to 75V
Programmable Output from 1.23V to 70V
Emulated Peak Current Mode Control
Smooth transition between step-down and
buck-boost modes
Switching frequency programmable to 500kHz
Ultra low Shutdown current 1uA
Integrated high voltage bias regulator, soft-start,
and thermal shutdown
± 1.5% Reference Voltage Accuracy
eTSSOP-20
High efficiency vs. SEPIC designs
ECM control and smooth mode transitions
provide stable regulation over wide Vin and
load conditions
Ultra low shutdown current of 1uA provides the
flexibility needed in max efficiency applications
AEC-Q100 automotive grade 1 qualified
Automotive Infotainment and Start/Stop Systems
Telecom and Industrial Buck/Boost Supplies
High-current Battery Chargers
LM511875V Wide Voltage Range Buck-Boost Controller
TPS55340 5A 40V SWIFT™ Boost Converter
TPS55340
VIN
EN
SW
SW
SWFREQ
SS
COMP
SYN
AGND
FB
PGND
PGND
PGND
VIN VOUT
• 2.9V to 38V Input Voltage Range
• 70m, 5A Peak, 40V Low-side MOSFET
• Current-mode Control with Slope Comp
• Lossless SenseFET current Sensing
• 1 uA Shutdown Current
• 100kHz to 1.2MHz Switching Frequency
• PLL Frequency Synchronization
• 93% Maximum Duty Cycle
• + 2 % Error Amplifier Reference
• Programmable Soft-Start
• QFN16 (3x3mm) or HTSSOP14
• Industrial Power Systems
• Thunderbolt ports in laptop
• Wide Input Voltage Range
• High Switching Frequency Enables Small
Passives
• Small Total Solution Size
Adjustable Soft Start
Enable function
Externally compensated
Low I-sense threshold (150mV)
Supports Boost, Flyback, and
SEPIC topologies
Synchronizable to external clock
Prevents inrush current
On/off control
Design flexibility
Enables use of small I-sense resistors with
lower power dissipation
Design and implementation flexibility
Battery powered systems
Industrial control systems
LED lighting systems (40211 with 260mV ref)
TPS402104.5V to 52V Input Current Mode Boost Controller
EVM
TPS40210EVM
TINA/PSPICE models
10 pin MOSP/SON
Automotive Qual: TPS40210-Q
EVM/Tool
LM50226V to 60V Low Side Controller for Boost and SEPIC
• Internal 60V Start Up Regulator
• 1A peak MOSFET Gate Driver
• Current Mode Control
• 90% Maximum Duty Cycle
• Programmable Fsw to 2MHz
• Externally Synchronizable (AC
Coupled)
•Webench Tool
•LM5022EVAL
• SEPIC Converters
• Boost Converters
10 pin MSOP
• High Vin Start-up with No Extra Parts
• High Current Capability
• Inherent Input voltage Feed Forward
• Supports Low Vin and High Vout
• Optimize for Size or Efficiency
• Eliminates Beat Noise to Reduce
Electro Magnetic Interference
EVM PART # LM5020EVAL
LM5020100V Current Mode PWM Controller
Internal 100V Start-up Bias Regulator
Integrated 1A gate driver, error amplifier and
precision reference
Current mode Control for inherent line feed-forward
with Current Sense Leading edge blanking
Programmable Line UVLO w/ adjustable hysteresis
Resistor Programmed 1MHz Oscillator with
synchronization capability
Internal error amplifier, soft-start, and thermal
shutdown
Two Max Duty Cycle Options: LM5020-1:80%,
LM5020-2: 50%
MSOP-10, LLP-10 (4x4mm)
High level of integration allows for greater power
density DC-DC power converters
100V operation a wide range of high voltage
telecom and industrial applications
Current mode control with leading edge blanking
simplifies design and improved transient response
Isolated DC-DC Converter Modules
Telecom, Data communication systems
Automotive and Industrial power
supplies
Distributed power systems
Current Mode Leading Edge SpikeFilter out the leading edge spike with a RC filter
Use leading edge blanking
This portion of the duty cycle is
un-available Precludes narrow
pulses (high Vin to Vout ratios)
Waveform Distortion is a
problem for small duty cycles Filter
CLOCK
SWITCH
DRIVERS
R
S
Q
SWITCH
CURRENT
MEASURE
1.25V
REFERENCE
Vin Vout
ERROR
AMPPWM
COMPARATOR
Q1
Q2
L1
EVM PART # LM500EVAL,
LM5001BSTEVAL
3.1V to 40V Operating Input Voltage Range
Integrated 80V N-channel Switch
2A/1A/0.5A Output Current
Current Mode control with Adjustable
Compensation
Adjustable Output Voltage From 1.284V
Cycle-by-Cycle Current Limiting
Selectable Operating Frequency from
300kHz to 1.3MHz
Package: TSSOP16 and LLP-16
Integrated switch enables simple isolated and non-
isolated power supply designs
Wide operating range allows use in multiple high
voltage telecom, automotive and industrial
applications
Isolated and Non-Isolated Telecom
Flyback and Forward Converters
Automotive Boost Regulators
LM5000/LM5001/LM5002High Voltage Boost Switching Regulators
Non-isolate Flyback
TPS550102.95V to 6V Input, 2W Isolated DC/DC SWIFTTM Converter
• Fly-BuckTM Topology with Integrated
45/45 mΩ Half-Bridge
• Primary Side Feedback
• Programmable Primary Side Voltage
with Resistor Divider
• Synchronizes to External Clock
• Adjustable Slow Start
• Simple Design with 85% Efficiency at
5V/200mA
• No Optocoupler required
• Vary Input to Output Voltage
Combinations with Same Transformer
• Eliminates Beat Noise
• Low Inrush Current
PH
VIN
GND
BOOT
VSENSE
COMP
TPS55010
EN
RT/CLK
SS
FAULT
Css
RtCc
CbootT1
R1
R2
Cin
C1
INPUT
+5V
+
5V
_
1:2
Co
• Noise Immunity for PLCs, Industrial
Control, & Measurement
• RS232/485/Fieldbus Communication
• Power for Line Drivers, ISO Amplifiers,
CAN Transceivers
• Floating Supplies for IGBT Gate Drivers Examples
• +5V to +5V at 200mA
• +3.3V to +5V at 200mA
• +5V to +/-15V at 25mA• TPS55010EVM-009
• Design Calculator on Web
3x3mm 16QFN
Fly-Buck Topology
Cin
Cr
S1
S2
PWM Controller
FBDRVH DRVL
T1+
Vo
_
Npri NsecCo
D1• Also known as Asymmetrical Half-
Bridge
• Controller Operates Like Sync Buck
• Low Parts Count
• Voltage Across Cr is Regulated
• Auxiliary Winding Added to Inductor
• Vo is a Reflection of Cr Voltage
• Load Regulation Is Degraded By:
• Leakage
• Diode Drop
• DCR
Digital Isolation Power
• Isolated gate Drivers ISO55xx family Cross Sell
• Motor control – solar inverter & isolated bridge
• High-speed digital isolators– ISO721 and ISO722
• Isolated transceivers – ISO1176 isolated Profibus
device
– ISO35 isolated 3.3-V RS-485 device
– ISO3086 isolated 5-V RS-485 transceiver.
Processor Power Website - Best ways to get there
http://www.ti.com/analog/docs/analogsplash.tsp?contentId=135387
TI Power Reference Design Search Tool Easy to use search tool
Search by input / output criteria, application, topology
Can export list to excel spreadsheet
Provides link to the reference design folder for detailed information
Popular designs available at www.ti.com/powerlab
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