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ISL6440
20051004 FN9040.2
1 IC 1-888-INTERSIL 321-724-7143|Intersil ()Intersil Americas
Inc
Intersil Americas Inc. 2006
330000kkHHzz118800PPWWMM
ISL6440 PWM
0.8VPWM 180RMS
ISL6440 MOSFET Hiccup -/
PWM 1SD 2SD PWM
PGOOD 10% 75%+150
5.6V24V
4.5V5.6V 300kHz PWM
MOSFETrDS(ON)
PGOOD
UVLO
PWM
RoHS
xDSL/ DSPASICFPGA DSPPI/O
PKG.
DWG.# ISL6440IA ISL6440IA -40 85 24
QSOP M24.15
ISL6440IAZ
ISL6440IAZ -40 85 24 QSOP
M24.15
Intersil / 100%Intersil MSL IPC/JEDEC J STD-020 -T-TK
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ISL6440
2
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ISL6440
3
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ISL6440
4
(VCC_5V) -0.3V+7V(VIN) +27VBOOT1,2UGATE1,2 +35VPHASE1,2ISEN1,2
+27VPHASE1,2BOOT1,2 +6.5VUGATE1,2 (PHASE1,2-0.3V)(BOOT1,2+0.3V)
JA(/W) 24Ld QSOP(1) 85 -55150 -65150 10s 300 -4085
1.JCTB379
VIN=5.6V 24V VCC_5V=5V 10%TA=-40 85 3 TA=25
VIN 5.6 12 24 V VCC_5V 3 4.5 5.0 5.6 V VIN>5.6V, IL=20mA 4.5
5.0 5.5 V VIN=12V 60 - - mA
4 1SD = 2SD =GND - 50 375 A 5 - 2.0 4.0 mA - 0.8 - V -1.0 - 1.0
% VCC_5V 4.25 4.45 4.5 V VCC_5V 3.95 4.2 4.4 V 260 300 340 kHz
VIN=12V - 1.6 - V 6 VIN=5V - 0.667 - V 7 - 1.0 - V 1/ 2 3A 2.0 -
- V - - 0.8 V PWM - 0.8 - V FB - - 150 nA COUT=1000pF, TA=25 93 - -
% - 4 - % PWM DC 7 80 88 - dB 7 5.9 - - MHz 7 - 2.0 - V/s 7 0.9 - -
V 7 - - 3.6 V PWM 8 / - 400 - mA VCC_5V=4.5V - 8 - VCC_5V=4.5V -
3.2 -
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ISL6440
5
VCC_5V=4.5V - 8 - VCC_5V=4.5V - 1.8 - COUT=1000pF - 18 - ns
COUT=1000pF - 18 - ns PGOOD =100k - 0.1 0.5 V PGOOD - - 1.0 A PGOOD
PWM1 2 105 - 120 % PGOOD PWM1 2 80 - 95 % ISEN 9 - 32 - A 9
ROCSET=110k - 64 - A OCSET - 1.75 - V - 5 - A
- 150 - - 20 -
2-40+85 3 VINVCC_5V 5V 60mA VCC_5V 5V LDO VIN VCC_5V 4 VIN=
VCC_5V=PVCC=5V 5 6- 12V 5V 7 8 9 32A
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ISL6440
6
( ISL6440EVAL1B VIN=12V)
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ISL6440
7
( ISL6440EVAL1B VIN=12V)
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ISL6440
8
BOOT2, BOOT1- PWM MOSFET VCC_5V UGATE2, UGATE1- MOSFET PHASE2,
PHASE1- MOSFET MOSFET LGATE2, LGATE1- MOSFET PGND- PWM1 PWM2 MOSFET
FB2, FB1-
PGOOD ISEN2, ISEN1- MOSFET PGOOD- PWM 10% SGND-PGND SGND VIN-
5.6V 24V 5V 10% VCC5 VCC5-+5V ICIC 5V 10% 5V VINVCC5 4.7F BIAS-
VCC5 SS1, SS2- PWM 5A 0 0.8V 0 0.8V
1SD , 2SD - PWM /
OCSET2, OCSET1- PWM
ISL6440
SS1, 1SD ,SS2, 2SD
PWM 300kHz
5V VCC5
ISL6440 +5V 24VVCC5 4.7F LDO 600mV VIN 5.6V VCC5V +5VISL6440
VCC5 4.4V
LDO 60mA IC
FET 30nC FET
30nC 300kHz=9mA FET 36mA 3mA +5V 20mA FET 5V FET 5V 10%VCC5 5V
10% VCC5 VIN
5A PWM SS
SS 0.8V PWM PGOODSS
TSOFT=0.8V( A5SSC
)
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ISL6440
9
PWM
PWM PWM1=1.2VPWM2=3.3VCSS1/CSS2=1.2/3.3=0.364 14
CSS1=0.01FCSS2=0.027F
PWM FBx
VOUTx=0.8V( 221
RRR +
)
R1 R2 FB1 FB2
ISL6440 PWM 180
EMI EMI
PWM FET
ESR RMS ESR ESR
ISL6440 MOSFET 180 RMS
EMI 180
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ISL6440
10
ISL6440 4.5V 24V
DMAX=93%
VIN ( min) = ( 93.01dOUT VV +
) + Vd2 - Vd1
Vd1= FET
PC Vd2= FET PC
tON ( min)
VIN (MAX) kHzt
VON
OUT
300(min)
tON(min)=30ns
PWM
IC MOSFET MOSFET 20ns MOSFET
VCC5 400mA /
400mA N MOSFET BOOT PHASE MOSFET IC UGATE MOSFET
FET
MOSFET PHASE BOOT 5V MOSFET MOSFET BOOT UGATE - MOSFET VIN 5V
MOSFET 5V
PGOOD hiccup PWM MOSFET rDS (
ON) OCSETx
ROCSET= ))(())(7(
)(ONDSOC
CS
RIR
IOCRCS ISENx MOSFET 2 IC hiccup IC IC X
rDS (ON) 150% 180% MOSFET
IC 150 130
PWM
PWM VIN
PWM MOSFET
ISEN
MOSFET rDS (ON)
RCS ARI onDSMAX32
))(( )(
RCS 32A 2A 100A
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ISL6440
11
-20dB
FPO=OO CR 2
1
ROCO2
16 2 2 -
FZ=122
1CR
=6kHz
FP=212
1CR
=600kHz
-zero-pole pair phase boost
1.2kHz 30kHz ESR R1 CZR1
ISL6440 -ISL6440
EMI PC
ISL6440 -
1 FET FET
MOSFET FET FET dv/dt
2 IC SGND PGND
3 FET FET
4 MOSFET,
5 PWM FET LGATE IC
6 VCC5 IC VCC5 PGND
7 BOOT BOOT IC
8
9 FETFET PHASE IC dv/dt 10 11 IC SGND SDx SGND 12 MOSFET
MOSFET PWM1 PWM2 N MOSFETMOSFET rDS (ON)
MOSFET MOSFET
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ISL6440
12
MOSFET -MOSFET
PUPPER=
2))()()(())()(( )(
2SWSWINO
IN
OUTONDSO FtVIV
VrI+
PLOWER=IN
OUTINONDSO
VVVrI ))()(( )(
2
tSWMOSFET MOSFET
ISL6440 0% 71%
COUT= ))((2))(( 2
OUTOIN
TRANO
DVVVIL
COUTLOITRANVINVODVOUT
ESR()
ESR
VRIPPER=IL(ESR) IL
300kHz
ESR
ESR zerofZ1.2kHz 30kHz 6kHz ESR 5
COUT= ))((21
ZfESR
3 1
2 ESR
3 ESR
ISL6440 150F 680F
POSCAP ESR
PWM
ESR
IL= ))()(())((
INS
OUTOUTIN
VLfVVV
ISL6440 4.7H 10H
RMS
RMS 1.25 1.5 RMS RMS
IRMS=2
22
1 RMSRMS II +
IRMSx=2DCDC
DC PWM
17 PWM RMS
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ISL6440
13
MOSFET PMS MOSFET
OS-CONESR
AVXTPS
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ISL6440
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14
SSOP QSOP
