View
1
Download
0
Category
Preview:
Citation preview
1dc1668abf
DEMO MANUAL DC1668A-B
DESCRIPTION
LTM4627EV High Efficiency 40A PolyPhase Step-Down
Power Supply
BOARD PHOTO
Demonstration circuit 1668A-B is a PolyPhase® power sup-ply featuring three LTM®4627 high efficiency synchronous buck µModule® regulators. The DC1668A-B input voltage range is between 4.5V to 20V with a jumper programmable output voltage from 0.6V to 3.3V. The demo circuit can deliver up to 40A of load with excellent current sharing. Current derating may be necessary under certain operat-ing conditions.
The LTM4627 can be synchronized to an external clock be-tween 250kHz to 770kHz. The default switching frequency for the DC1668A-B is set to 500kHz through the onboard
LTC6902 clock generator. The external clock interleaves the paralleled phases to minimize input and output ripple.
DC1668A-B demonstrates that paralleling LTM4627 mod-ules is easy and reliable. These features and the availability of the LTM4627 in a compact thermally enhanced 15mm × 15mm × 4.32mm LGA package make the circuit ideal for use in high density point of load regulation applications.
Design files for this circuit board are available at http://www.linear.com/demoL, LT, LTC, LTM, Linear Technology, PolyPhase, µModule and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
http://www.linear.com/demo
2dc1668abf
DEMO MANUAL DC1668A-B
PARAMETER CONDITION VALUE
Input Voltage Range 4.5V to 20V
Output Voltage VOUT Remove VOUT SEL Jumper for VOUT = 0.6VDC 0.6VDC, 1VDC, 1.2VDC, 1.5VDC, 1.8VDC, 2.5VDC, 3.3VDC
Maximum Continuous Output Current IOUT(MAX) Current Derating May Be Necessary for Certain VIN, VOUT, Frequency and Thermal Conditions.
40ADC
Default Operating Frequency 500kHz
External Clock Synchronous Frequency Range 250kHz to 770kHz
Output Voltage Ripple (Typical) VIN = 12V, VOUT = 1.8V 500kHz (20MHz BW)
< 20mVP-P at IOUT = 40A, See Figure 5
Efficiency VIN = 12V, VOUT = 1.8V 500kHz
87.3% at IOUT = 40A, See Figure 2
Load Transient VIN = 12V, VOUT = 1.8V See Figure 4
QUICK START PROCEDURE
PERFORMANCE SUMMARY
Demonstration circuit 1668A-B is easy to set up to evaluate the performance of paralleled LTM4627 modules. Please refer to Figure 1 for proper measurement equipment setup and follow the procedure below:
1. With power off, connect the input power supply, load, meters, and VOUT BNC cable as shown in Figure 1. Preset the load to 0A and VIN supply to be 0V. Place jumpers in the following positions for a typical 1.8VOUT application:
JP2 JP7 JP6
VOUT Select RUN TRACK/SS
1.8V OFF SOFT-START
2. Turn on the power at the input. Increase VIN to 12V (Do not hot-plug the input supply or apply more than the rated maximum voltage of 20V to the board or the modules may be damaged).
3. Set the RUN pin jumper (JP7) to the ON position. The output voltage should be regulated. The output voltage meter should read 1.8V ±2% (1.76V to 1.84V).
4. Vary the input voltage from 5V to 20V and adjust the load current from 0A to 40A. VOUT should remain regulated at 1.8V ±2%. Observe the load regulation, output voltage ripple, efficiency and other parameters. Output voltage ripple should be measured at J6 with a BNC cable and oscilloscope. The probe channel for VOUT should be set at 50Ω termination resistance to match the BNC Cable.
5. For optional load transient testing apply an adjustable positive pulse signal between IOSTEP CLK and GND pins. The pulse amplitude sets the load step current amplitude. The pulse width should be short (< 1ms) and pulse duty cycle should be low (< 15%) to limit the thermal stress on the load transient circuit. The load step current can be monitored with a BNC connected to J5 (5mV/A).
3dc1668abf
DEMO MANUAL DC1668A-B
QUICK START PROCEDURE
Figure 1. Test Setup of DC1668A-B
– +
+– V
A
+
+
–
–
V
A
VIN
BNC CABLETO OSCILLOSCOPETERMINATE INTO 50Ω
LOAD
1668ab F01
4dc1668abf
DEMO MANUAL DC1668A-B
QUICK START PROCEDURE
Figure 2. Measured Efficiency at 12VIN, 500kHz
Figure 4. Measured Load Step Response
Figure 3. Thermal Capture at 12VIN, 1.8VOUT, 40A, 500kHz No Forced Airflow (Convection). TA = 29°C
Figure 5. Measured Output Voltage Ripple (20MHz BW)
LOAD CURRENT (A)0
EFFI
CIEN
CY (%
)
252015
1668ab F02
95
90
105 403530
85
80
75
70
3.3VOUT2.5VOUT1.8VOUT1.5VOUT1.2VOUT1VOUT
1668ab F04
20A/DIV
100mV/DIVVOUT
IOUT STEP
VOUT = 1.8VIOUT DC = 20AIOUT STEP = 20AfSW = 500kHz
1668ab F05
50mV/DIVVOUT
VOUT = 1.8VIOUT = 40AfSW = 500kHz
5dc1668abf
DEMO MANUAL DC1668A-B
PARTS LISTITEM QUANTITY REFERENCE-DESCRIPTION DESCRIPTION MANUFACTURER’S PART NUMBER
Required Circuit Components:
1 1 CIN1 Cap, 150µF 20% 35V Alum Sanyo 35MV150WXV
2 3 CIN13, CIN18, CIN20 Cap, 1210 22µF 20% 25V X5R AVX 12103D226MAT2A
3 3 COUT1, COUT5, COUT9 Cap, 1812 100µF 20% 6.3V X5R TDK C4532X5R0J107MZ
4 3 COUT20, COUT21, COUT22 Cap, 470µF 20% 4V POSCAP Sanyo POSCAP 4TPF470ML
5 2 R8 Res, 0603 0Ω Jumper Vishay CRCW06030000Z0EA
6 2 R18, R19 Res, 0603 10Ω 5% 1/10W AAC CR16-100JM
7 4 R30, R31, R32, R33 Res, 0603 100Ω 5% 1/10W KOA RK73B1JTTD101J
8 1 R34 Res, 0603 100k 5% 1/10W Vishay CRCW0603100KJNEA
9 1 R35 Res, 0805 0Ω Jumper Vishay CRCW08050000Z0EA
10 1 U5 IC, LTC6902CMS Multiphase Oscillator Linear Technology LTC6902CMS
11 1 C12 Cap, 0603 100pF 10% 50V NP0 AVX 06035A101KAT2A
12 1 C61 Cap, 0603 68pF 10% 50V NP0 AVX 06035A680KAT
13 1 C65 Cap, 0603 1000pF 10% 50V NP0 AVX 06035A102KAT2A
14 1 R1 Res, 0603 10k 1% 1/10W Vishay CRCW060310K0FKEA
15 1 R2 Res, 0603 13.3k 1% 1/10W Vishay CRCW060313K3FKEA
16 1 R3 Res, 0603 6.34k 1% 1/10W Vishay CRCW06036K34FKEA
17 1 R4 Res, 0603 4.42k 1% 1/10W Vishay CRCW06034K42FKEA
18 1 R12 Res, 0603 30.1k 1% 1/10W Vishay CRCW060330K1FKEA
19 1 R14 Res, 0603 20k 1% 1/10W Vishay CRCW060320K0FKEA
20 1 R29 Res, 0603 133k 1% 1/10W Vishay CRCW0603133KFKEA
21 3 U1, U2, U3 IC, µModule Regulator Linear Technology LTM4627EV
Additional Demo Board Circuit Components:
1 2 C14, C38 Cap, 0603 0.1µF 20% 16V X7R Taiyo Yuden EMK107BJ104MA-T
2 1 C16 Cap, 0603 1µF 20% 10V X5R Taiyo Yuden LMK107BJ105MA-T
3 1 C60 Cap, 0603 1000pF 10% 50V NP0 AVX 06035A102KAT2A
4 1 D1 Diode, Zener 350mW Diodes Inc. MMBZ5227B
5 1 R7 Res, 0805 2k 5% 1/10W AAC CR10-202JM
6 1 Q14 XSTR, SUD50N03-10CP MOSFET Siliconix SUD50N03-10CP
7 1 R10 Res, 0603 10k 5% 1/10W AAC CR16-103JM
8 2 R20 Res, 0603 0Ω Jumper Vishay CRCW06030000Z0EA
9 3 R11, R16, R17 Res, 2512 0.015Ω 1% 1W Panasonic ERJM1WSF15MU
10 0 CIN2, CIN3 Cap, 1206 10µF 20% 35V X5R Option Taiyo Yuden GMK316BJ106ML-T Option
11 0 CIN14, CIN19, CIN21, CIN23 Cap, 1210 22µF 20% 25V X5R Option AVX 12103D226MAT2A Option
12 0 COUT2, COUT3, COUT6 Cap, 1812 100µF 20% 6.3V X5R Option TDK C4532X5R0J107MZ Option
13 0 COUT4, COUT7, COUT11 Cap, 1812 Option Taiyo Yuden JMK432BJ107MU-T Option
14 COUT15
15 0 COUT10, COUT14 Cap, 1812 100µF 20% 6.3V X5R Option TDK C4532X5R0J107MZ Option
16 0 COUT19 Cap, 1206 Option Taiyo Yuden EMK316BJ475ML-T Option
17 0 COUT23, COUT26, COUT27 Cap, 470µF 20% 4V POSCAP Option Sanyo POSCAP 4TPF470ML Option
18 0 COUT24 Cap, 1812 Option Taiyo Yuden JMK316BJ226ML-T
6dc1668abf
DEMO MANUAL DC1668A-B
ITEM QUANTITY REFERENCE-DESCRIPTION DESCRIPTION MANUFACTURER’S PART NUMBER
19 0 C15 Cap, 0603 1µF 20% 10V X5R Option Taiyo Yuden LMK107BJ105MA-T Option
20 0 C18, C55, C56, C57, C58, C62 Cap, 0603 Option Option
21 C74 to C77
22 0 C59, C63, C66, C68 Cap, 0805 Option Option
23 0 C64 Cap, 0603 1000pF 10% 50V NP0 Option AVX 06035A102KAT2A Option
24 0 C69, C71, C72, C73 Cap, 150µF 20% 35V Alum Option Sanyo 35MV150WXV Option
25 1 C70 Cap, 0603 0.22µF 20% 10V X5R Option Taiyo Yuden LMK107BJ224MA-T Option
26 0 R9, R13, R15, R23, R24 Res, 0603 51k 5% 1/10W Option AAC CR16-513JM Option
27 0 R21, R22, R36 Res, 0603 Option Option
28 0 CIN22 Cap, 1210 22µF 20% 25V X5R Option AVX 12103D226MAT2A Option
29 0 COUT13 Cap, 1812 100µF 20% 6.3V X5R Option TDK C4532X5R0J107MZ Option
30 0 COUT25 Cap, 470µF 20% 4V POSCAP Option Sanyo POSCAP 4TPF470ML Option
31 0 R26, R27, C54, C67 Cap, 0603 Option Option
Hardware
1 6 JP1, JP2, JP3, JP4, JP5, JP8 Header, 2 Pin, 2mm Samtec TMM 102-02-L-S
2 2 JP6, JP7 Header, 3 Pin, 2mm Samtec TMM-103-02-L-S
3 4 J1, J2, J3, J4 Stud, Press-Fit PEM KFH-032-10
4 2 J5, J6 Conn, BNC, 5 Pins Connex 112404
5 10 TP1 to TP8, TP13, TP14 Turret Mill Max 2501-2-00-80-00-00-07-0
6 3 JP1, JP6, JP7 Shunt, 2mm Samtec 2SN-BK-G
7 4 Standoff, Snap On Keystone 8834
8 8 J1, J2, J3, J4 Nut, Brass #10-32 Any
9 4 J1, J2, J3, J4 Washer, Brass #10 Any
10 4 J1, J2, J3, J4 Lug, Ring Keystone 310 PbF
PARTS LIST
7dc1668abf
DEMO MANUAL DC1668A-B
SCHEMATIC DIAGRAMS
SO
FT
ST
AR
T
EX
T.T
RA
CK
13
2
VIN
GN
D
VIN
+
VIN
-
CO
MP
IOS
TE
PC
LK
VO
+
VO
UT
GN
D
VO
-
TR
AC
K/S
S
VO
UT
OF
F
ON
IOS
TE
P
0.6
V -
3.3
V
3.3
V1.2
V1.5
V2.5
V1.8
V
VO
UT
SE
L
4.5
V -
20V
SH
T 2
,3
SH
T 2
,3
SH
T 2
,3
SH
T 2
,3
SH
T 3
SH
T 2
,3
SG
ND
123
TR
AC
K/S
S
RU
N
**
**
**
1.0
V
PG
OO
D
*
*
4
402K
U1-U
4
15k
IC
100pF
OP
TO
PT
4T
PF
470M
L
68pF
45.3
k
10k
3.3
2k
30.1
kO
PT
CIN
22
1nF
47pF
100K
OP
T
Poscap
1nF
100uF
R27 0
0
OP
T40A
R1
Poscap
100uF
10k
15k
6.3
4k
180pF
OP
T
C61
68pF
OP
T
22uF
R29
9.5
3k
3
30A
R12
180pF
OP
T
CO
UT
22
R26
AS
SY
1nF
OP
TO
PT
6.6
5k
OP
T13.3
k4.4
2k
CO
UT
25
C54
180pF
47pF
R2
- A
*
100uF
CIN
20
180pF
7.5
k
IOU
TR
3
U1,U
2
30.1
k22uF
C53
C12
OP
T
2
50A
OP
T
OP
T
OP
T68pF
OP
T
4.7
5k
U1-U
34T
PF
470M
L
OP
T
C65
CO
UT
9
OP
T
OP
T
* F
SW
= 5
00K
Hz
- C
20k
PH
AS
E N
o.
22.6
k
C67
CO
UT
13
C52
R14
100pF
OP
T
22uF
20k
- B
133K
R4
47pF
EX
TV
CC
NO
TE
S:
UN
LE
SS
OT
HE
RW
ISE
SP
EC
IFIE
D,
35M
V150W
XV
1206
1206
35M
V150W
XV
1210
1210
0805
1206
2512
2512
2512
7343
1812
1812
1812
1812
1812
0805
1. A
LL
RE
SIS
TO
RS
AN
D C
AP
AC
ITO
RS
AR
E 0
60
3.
SH
T 2
,3
VO
+
VO
-
VF
B
VIN
VO
-
VO
+
VO
UT
VO
UT
DIF
FV
OU
T
CO
MP
VIN
VO
UT
VIN
5V
VIN
5V
CLK
1
CO
MP
VF
B
DIF
FV
OU
T
TR
AC
K/S
S
RU
N
EX
TV
CC
RE
VIS
ION
HIS
TO
RY
DE
SC
RIP
TIO
ND
AT
EA
PP
RO
VE
DE
CO
RE
V
SA
M Y
.F
IRS
T P
RO
TO
TY
PE
104/2
9/1
0
RE
VIS
ION
HIS
TO
RY
DE
SC
RIP
TIO
ND
AT
EA
PP
RO
VE
DE
CO
RE
V
SA
M Y
.F
IRS
T P
RO
TO
TY
PE
104/2
9/1
0
RE
VIS
ION
HIS
TO
RY
DE
SC
RIP
TIO
ND
AT
EA
PP
RO
VE
DE
CO
RE
V
SA
M Y
.F
IRS
T P
RO
TO
TY
PE
104/2
9/1
0
TE
CH
NO
LO
GY
W
ednesday,
Octo
ber
20,
2010
HIG
H E
FF
ICIE
NC
Y P
OLY
PH
AS
E S
TE
P-D
OW
N
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R M
OD
ULE
R
TE
CH
NO
LO
GY
W
ednesday,
Octo
ber
20,
2010
HIG
H E
FF
ICIE
NC
Y P
OLY
PH
AS
E S
TE
P-D
OW
N
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R M
OD
ULE
R
TE
CH
NO
LO
GY
W
ednesday,
Octo
ber
20,
2010
HIG
H E
FF
ICIE
NC
Y P
OLY
PH
AS
E S
TE
P-D
OW
N
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R M
OD
ULE
R
C70
OP
T
C70
OP
T
R20
0R
20
0
J6
J6
1
2
3
4
5
C16
1uF
C16
1uF
C74
OP
T
C74
OP
T
+C
IN1
150uF
+C
IN1
150uF
1 2
JP
3JP
3
CIN
2
OP
T
35V
CIN
2
OP
T
35V
CO
UT
3
OP
T
CO
UT
3
OP
T
TP
14
TP
14
C61
*C
61
*
CO
UT
1
100uF
6.3
V
CO
UT
1
100uF
6.3
V
TP
2T
P2
R8
0R
80
R17
0.0
15
1%R
17
0.0
15
1%
C18
OP
T
C18
OP
T
CO
UT
24
OP
T
CO
UT
24
OP
T
TP
4T
P4
R21
OP
T
R21
OP
T
JP
5JP
5
TP
1T
P1
JP
1JP
1
R14
1%
R14
1%
Q14
SU
D50N
03-1
0C
P
Q14
SU
D50N
03-1
0C
P 1
2 3
J5
J5
1
2
3
4
5
R2
1%
R2
1%
R19
10
R19
10
TP
6T
P6
JP
8JP
8
CIN
14
OP
T
25V
CIN
14
OP
T
25V
TP
5T
P5
+C
69
OP
T
+C
69
OP
T
1 2R
13
OP
TR
13
OP
T
CO
UT
2
OP
T
CO
UT
2
OP
T
J1
J1
C55
OP
T
C55
OP
T
R16
0.0
15
1%R
16
0.0
15
1%
C59
OP
T
C59
OP
T
TP
3T
P3
JP
6JP
6
D1
MM
BZ
5227B
D1
MM
BZ
5227B
13
R9
OP
T
R9
OP
T
C62
OP
T
C62
OP
T
R34
100K
R34
100K
J2
J2
R35
0R35
0
CIN
3
OP
T
35V
CIN
3
OP
T
35V
C60
1nF
C60
1nF
U1
LT
M4627E
VU
1LT
M4627E
V
SG
ND
G11
FS
ET
B12
VO
UT
_LC
LL12
CO
MP
A11
VF
BF
12
RU
NA
10
TR
AC
K/S
SA
9
PLLIN
A8
INT
VC
CA
7
VO
SN
S+
J12
VO
SN
S-
M12
DIF
F_V
OU
TK
12
INT
VC
CD
9
VINA1
VINA2
VINA3
VINA4
VINA5
VINA6
VINB1
VINB2
VINB3
VINB4
VINB5
VINB6
VINC1
VINC2
VINC3
VINC4
VINC5
VINC6
VOUTJ1
VOUTJ2
VOUTJ3
VOUTJ4
VOUTJ5
VOUTJ6
VOUTJ7
VOUTJ8
VOUTJ9
VOUTJ10
VOUTK1
VOUTK2
VOUTK3
VOUTK4
VOUTK5
VOUTK6
VOUTK7
VOUTK8
VOUTK9
VOUTK10
VOUTK11
VO
UT
L1
VO
UT
L2
VO
UT
L3
VO
UT
L4
VO
UT
L5
VO
UT
L6
VO
UT
L7
VO
UT
L8
VO
UT
L9
VO
UT
L10
VO
UT
L11
VO
UT
M1
VO
UT
M2
VO
UT
M3
VO
UT
M4
VO
UT
M5
VO
UT
M6
VO
UT
M7
VO
UT
M8
VO
UT
M9
VO
UT
M10
VO
UT
M11
PGNDD1
PGNDD2
PGNDD3
PGNDD4
PGNDD5
PGNDD6
PGNDE1
PGNDE2
PGNDE3
PGNDE4
PGNDE5
PGNDE6
PGNDE7
PGNDF1
PGNDF2
PGNDF3
PGNDF4
PGNDF5
PGNDF6
PGNDF7
PGNDF8
PGNDF9
PGNDG1
PGNDG2
PGNDG3
PGNDG4
PGNDG5
PGNDG6
PGNDG7
PGNDG8
PGNDG9
PGNDH1
PGNDH2
PGNDH3
PGNDH4
PGNDH5P
GN
DH
6
PG
ND
H7
PG
ND
H8
PG
ND
H9
SG
ND
H11
SG
ND
H12
PGNDC9PGNDC7
PGNDB9
PGNDB7
PGNDD8
PGNDE9
PG
OO
DF
11
PG
OO
DG
12
MT
P8
D12
MT
P7
D11
MT
P6
D10
MT
P5
C12
MT
P4
C11
MT
P3
C10
MT
P2
B11
EX
TV
CC
E12
MT
P1
A12
CIN
13
22uF
25V
CIN
13
22uF
25V
JP
2JP
2
R10
10K
R10
10K
R4
1%
R4
1%
R18
10
R18
10
TP
7T
P7
R11
0.0
15
1%R
11
0.0
15
1%
R3
1%
R3
1%
R1
1%
R1
1%
R22
OP
T
R22
OP
T
R36
OP
T
R36
OP
T
R12
1%
R12
1%
C12
*C12
*
CO
UT
19
OP
T
CO
UT
19
OP
T
JP
7JP
7
J3
J3
TP
13
TP
13
R7
2K
R7
2K
+C
OU
T20
470uF
4V
+C
OU
T20
470uF
4V
1 2
C14
0.1
uF
C14
0.1
uF
CO
UT
4
OP
T
CO
UT
4
OP
T
JP
4JP
4
J4
J4
TP
8T
P8
C15
OP
T
C15
OP
T
8dc1668abf
DEMO MANUAL DC1668A-B
SCHEMATIC DIAGRAMS
SH
T 1
,3
SH
T 1
,3
SH
T 1
,3S
HT
1,3
SH
T 1
,3
SH
T 3
SH
T 3
*
*
SH
T 1
,3
35M
V150W
XV
1210
1210
0805
7343
1812
1812
1812
1812
1812
7343
1812
35M
V150W
XV
1210
1210
0805
TR
AC
K/S
S
CO
MP
DIF
FV
OU
T
VF
B
VF
B
DIF
FV
OU
T
EX
TV
CC
CO
MP
EX
TV
CC
VIN
VO
UT
VIN
VO
UT
VF
B
DIF
FV
OU
T
CO
MP
CLK
2
TR
AC
K/S
S
RU
N
CLK
3
EX
TV
CC
TE
CH
NO
LO
GY
W
ed
ne
sd
ay,
Octo
be
r 2
0,
20
10
HIG
H E
FF
ICIE
NC
Y P
OL
YP
HA
SE
ST
EP
-DO
WN
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R
M
OD
UL
E
R
TE
CH
NO
LO
GY
W
ed
ne
sd
ay,
Octo
be
r 2
0,
20
10
HIG
H E
FF
ICIE
NC
Y P
OL
YP
HA
SE
ST
EP
-DO
WN
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R
M
OD
UL
E
R
TE
CH
NO
LO
GY
W
ed
ne
sd
ay,
Octo
be
r 2
0,
20
10
HIG
H E
FF
ICIE
NC
Y P
OL
YP
HA
SE
ST
EP
-DO
WN
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R
M
OD
UL
E
R
CIN
21
OP
T
CIN
21
OP
T
C63
OP
T
C63
OP
T
CIN
19
OP
T
CIN
19
OP
T+
C71
OP
T+
C71
OP
T
1 2
U2
LT
M4627E
VU
2LT
M4627E
V
SG
ND
G11
FS
ET
B12
VO
UT
_LC
LL12
CO
MP
A11
VF
BF
12
RU
NA
10
TR
AC
K/S
SA
9
PLLIN
A8
INT
VC
CA
7
VO
SN
S+
J12
VO
SN
S-
M12
DIF
F_V
OU
TK
12
INT
VC
CD
9
VINA1
VINA2
VINA3
VINA4
VINA5
VINA6
VINB1
VINB2
VINB3
VINB4
VINB5
VINB6
VINC1
VINC2
VINC3
VINC4
VINC5
VINC6
VOUTJ1
VOUTJ2
VOUTJ3
VOUTJ4
VOUTJ5
VOUTJ6
VOUTJ7
VOUTJ8
VOUTJ9
VOUTJ10
VOUTK1
VOUTK2
VOUTK3
VOUTK4
VOUTK5
VOUTK6
VOUTK7
VOUTK8
VOUTK9
VOUTK10
VOUTK11
VO
UT
L1
VO
UT
L2
VO
UT
L3
VO
UT
L4
VO
UT
L5
VO
UT
L6
VO
UT
L7
VO
UT
L8
VO
UT
L9
VO
UT
L10
VO
UT
L11
VO
UT
M1
VO
UT
M2
VO
UT
M3
VO
UT
M4
VO
UT
M5
VO
UT
M6
VO
UT
M7
VO
UT
M8
VO
UT
M9
VO
UT
M10
VO
UT
M11
PGNDD1
PGNDD2
PGNDD3
PGNDD4
PGNDD5
PGNDD6
PGNDE1
PGNDE2
PGNDE3
PGNDE4
PGNDE5
PGNDE6
PGNDE7
PGNDF1
PGNDF2
PGNDF3
PGNDF4
PGNDF5
PGNDF6
PGNDF7
PGNDF8
PGNDF9
PGNDG1
PGNDG2
PGNDG3
PGNDG4
PGNDG5
PGNDG6
PGNDG7
PGNDG8
PGNDG9
PGNDH1
PGNDH2
PGNDH3
PGNDH4
PGNDH5P
GN
DH
6
PG
ND
H7
PG
ND
H8
PG
ND
H9
SG
ND
H11
SG
ND
H12
PGNDC9
PGNDC7PGNDB9
PGNDB7
PGNDD8
PGNDE9
PG
OO
DF
11
PG
OO
DG
12
MT
P8
D12
MT
P7
D11
MT
P6
D10
MT
P5
C12
MT
P4
C11
MT
P3
C10
MT
P2
B11
EX
TV
CC
E12
MT
P1
A12
C52
*C
52
*
C64
1nF
C64
1nF
C76
OP
T
C76
OP
T
CO
UT
5
100uF
CO
UT
5
100uF
CO
UT
10
OP
T
CO
UT
10
OP
T
CO
UT
6
OP
T
CO
UT
6
OP
T
R23
OP
TR
23
OP
T
+
CO
UT
21
470uF
4V
+
CO
UT
21
470uF
4V
1 2
R15
OP
TR
15
OP
T
C53
*C
53
*
CO
UT
9
*
CO
UT
9
*
CO
UT
7
OP
T
CO
UT
7
OP
T
U3
LT
M4627E
VU
3LT
M4627E
V
SG
ND
G11
FS
ET
B12
VO
UT
_LC
LL12
CO
MP
A11
VF
BF
12
RU
NA
10
TR
AC
K/S
SA
9
PLLIN
A8
INT
VC
CA
7
VO
SN
S+
J12
VO
SN
S-
M12
DIF
F_V
OU
TK
12
INT
VC
CD
9
VINA1
VINA2
VINA3
VINA4
VINA5
VINA6
VINB1
VINB2
VINB3
VINB4
VINB5
VINB6
VINC1
VINC2
VINC3
VINC4
VINC5
VINC6
VOUTJ1
VOUTJ2
VOUTJ3
VOUTJ4
VOUTJ5
VOUTJ6
VOUTJ7
VOUTJ8
VOUTJ9
VOUTJ10
VOUTK1
VOUTK2
VOUTK3
VOUTK4
VOUTK5
VOUTK6
VOUTK7
VOUTK8
VOUTK9
VOUTK10
VOUTK11
VO
UT
L1
VO
UT
L2
VO
UT
L3
VO
UT
L4
VO
UT
L5
VO
UT
L6
VO
UT
L7
VO
UT
L8
VO
UT
L9
VO
UT
L10
VO
UT
L11
VO
UT
M1
VO
UT
M2
VO
UT
M3
VO
UT
M4
VO
UT
M5
VO
UT
M6
VO
UT
M7
VO
UT
M8
VO
UT
M9
VO
UT
M10
VO
UT
M11
PGNDD1
PGNDD2
PGNDD3
PGNDD4
PGNDD5
PGNDD6
PGNDE1
PGNDE2
PGNDE3
PGNDE4
PGNDE5
PGNDE6
PGNDE7
PGNDF1
PGNDF2
PGNDF3
PGNDF4
PGNDF5
PGNDF6
PGNDF7
PGNDF8
PGNDF9
PGNDG1
PGNDG2
PGNDG3
PGNDG4
PGNDG5
PGNDG6
PGNDG7
PGNDG8
PGNDG9
PGNDH1
PGNDH2
PGNDH3
PGNDH4
PGNDH5P
GN
DH
6
PG
ND
H7
PG
ND
H8
PG
ND
H9
SG
ND
H11
SG
ND
H12
PGNDC9
PGNDC7PGNDB9
PGNDB7
PGNDD8
PGNDE9
PG
OO
DF
11
PG
OO
DG
12
MT
P8
D12
MT
P7
D11
MT
P6
D10
MT
P5
C12
MT
P4
C11
MT
P3
C10
MT
P2
B11
EX
TV
CC
E12
MT
P1
A12
+
CO
UT
22
*+
CO
UT
22
*
1 2
+C
72
OP
T+
C72
OP
T
1 2
CIN
18
22uF
25
V
CIN
18
22uF
25
V
C75
OP
T
C75
OP
T
C56
OP
TC
56
OP
T
C57
OP
TC
57
OP
T
C65
*C
65
*
C68
OP
TC
68
OP
T
CO
UT
11
OP
T
CO
UT
11
OP
T
CIN
20
*
CIN
20
*
9dc1668abf
DEMO MANUAL DC1668A-B
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAMS
SH
T 1
,2
SH
T 1
,2
SH
T 1
,2S
HT
1,2
SH
T 1
,2
SH
T 1
SH
T 2
SH
T 2
*
SH
T 1
,2
35M
V150W
XV
1210
1210
0805
7343
7343
7343
7343
1812
1812
CLK
4
VO
UT
VIN
5V
5V
VO
UT
DIF
FV
OU
T
VF
B
CLK
1
CLK
2
CLK
3
TR
AC
K/S
S
RU
N
CO
MP
EX
TV
CC
TE
CH
NO
LO
GY
W
ednesday,
Octo
ber
20,
2010
HIG
H E
FF
ICIE
NC
Y P
OLY
PH
AS
E S
TE
P-D
OW
N
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R
M
OD
ULE
R
TE
CH
NO
LO
GY
W
ednesday,
Octo
ber
20,
2010
HIG
H E
FF
ICIE
NC
Y P
OLY
PH
AS
E S
TE
P-D
OW
N
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R
M
OD
ULE
R
TE
CH
NO
LO
GY
W
ednesday,
Octo
ber
20,
2010
HIG
H E
FF
ICIE
NC
Y P
OLY
PH
AS
E S
TE
P-D
OW
N
LT
M4
62
7E
VD
EM
O C
IRC
UIT
1668A
PO
WE
R
M
OD
ULE
R
+C
OU
T27
OP
T
+C
OU
T27
OP
T
1 2
CO
UT
14
OP
T
CO
UT
14
OP
T
R29
*1
%R
29
*1
%
CO
UT
13
*
CO
UT
13
*
C54
*C
54
*
R26
*R
26
*
R31
100
R31
100
+C
73
OP
T+
C73
OP
T
1 2
R30
100
R30
100
C77
OP
T
C77
OP
T
R32
100
R32
100
+C
OU
T25
*
+C
OU
T25
*
1 2
+C
OU
T26
OP
T
+C
OU
T26
OP
T
1 2
C67
*C
67
*
C66
OP
T
C66
OP
T
C58
OP
TC
58
OP
T
U4
LT
M4
62
7E
VU
4L
TM
46
27
EV
SG
ND
G1
1
FS
ET
B1
2
VO
UT
_L
CL
L1
2
CO
MP
A1
1
VF
BF
12
RU
NA
10
TR
AC
K/S
SA
9
PL
LIN
A8
INT
VC
CA
7
VO
SN
S+
J1
2
VO
SN
S-
M1
2
DIF
F_
VO
UT
K1
2
INT
VC
CD
9
VINA1
VINA2
VINA3
VINA4
VINA5
VINA6
VINB1
VINB2
VINB3
VINB4
VINB5
VINB6
VINC1
VINC2
VINC3
VINC4
VINC5
VINC6
VOUTJ1
VOUTJ2
VOUTJ3
VOUTJ4
VOUTJ5
VOUTJ6
VOUTJ7
VOUTJ8
VOUTJ9
VOUTJ10
VOUTK1
VOUTK2
VOUTK3
VOUTK4
VOUTK5
VOUTK6
VOUTK7
VOUTK8
VOUTK9
VOUTK10
VOUTK11
VO
UT
L1
VO
UT
L2
VO
UT
L3
VO
UT
L4
VO
UT
L5
VO
UT
L6
VO
UT
L7
VO
UT
L8
VO
UT
L9
VO
UT
L1
0
VO
UT
L1
1
VO
UT
M1
VO
UT
M2
VO
UT
M3
VO
UT
M4
VO
UT
M5
VO
UT
M6
VO
UT
M7
VO
UT
M8
VO
UT
M9
VO
UT
M1
0
VO
UT
M1
1
PGNDD1
PGNDD2
PGNDD3
PGNDD4
PGNDD5
PGNDD6
PGNDE1
PGNDE2
PGNDE3
PGNDE4
PGNDE5
PGNDE6
PGNDE7
PGNDF1
PGNDF2
PGNDF3
PGNDF4
PGNDF5
PGNDF6
PGNDF7
PGNDF8
PGNDF9
PGNDG1
PGNDG2
PGNDG3
PGNDG4
PGNDG5
PGNDG6
PGNDG7
PGNDG8
PGNDG9
PGNDH1
PGNDH2
PGNDH3
PGNDH4
PGNDH5P
GN
DH
6
PG
ND
H7
PG
ND
H8
PG
ND
H9
SG
ND
H1
1
SG
ND
H1
2
PGNDC9
PGNDC7
PGNDB9
PGNDB7
PGNDD8
PGNDE9
PG
OO
DF
11
PG
OO
DG
12
MT
P8
D1
2
MT
P7
D1
1
MT
P6
D1
0
MT
P5
C1
2
MT
P4
C1
1
MT
P3
C1
0
MT
P2
B1
1
EX
TV
CC
E1
2
MT
P1
A1
2
R24
OP
TR
24
OP
T
U5
LT
C6902C
MS
U5
LT
C6902C
MS
V+
1
DIV
2
PH
3
OU
T1
4
OU
T2
5O
UT
36
OU
T4
7
GN
D8
MO
D9
SE
T1
0
CO
UT
15
OP
T
CO
UT
15
OP
T
CIN
22
22uF
*CIN
22
22uF
*+
CO
UT
23
OP
T
+C
OU
T23
OP
T
1 2
R33
100
R33
100
R27
*R
27
*
C38
0.1
uF
C38
0.1
uF
CIN
23
OP
T
CIN
23
OP
T
10dc1668abf
DEMO MANUAL DC1668A-B
Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2010
LT 1110 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union direc-tive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
DESCRIPTIONBOARD PHOTOPERFORMANCE SUMMARYQUICK START PROCEDUREPARTS LISTSCHEMATIC DIAGRAMS
Recommended