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IR3710MTRPBF
IC PIN ORDER AND DESCRIPTION
NAME
BOOT
FF
EN
ISET
PGOOD
GND
FCCM
FB
SS
VCC
CPO
PVCC
LGATE
PGND
PHASE
UGATE
NUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
I/O LEVEL
V IN +PVCC
V IN
3.3V
32V
3.3V
Reference
3.3V
3.3V
3.3V
3.3V
3.3V
7.4V
PVCC
Reference
V IN
V IN + V5
DESCRIPTION
Bootstrapped gate drive supply – connect a capacitor to PHASE
Input voltage feed forward – sets on-time with a resistor to V IN
Enable input; EN = LOW inhibits GATE pulses
Current limit setting with a resistor to PH pin
Power good – pull up to 3.3V
Bias return and signal reference
Force continuous conduction mode when pulled up to VCC
Feedback input
Set soft start slew-rate with a capacitor to GND
IC bias supply
Charge Pump Output
Gate drive supply
Lower gate drive for synchronous MOSFET
Power return – connect to source of synchronous MOSFET
Phase node (or switching node) of MOSFET half bridge
Upper gate drive for control MOSFET
BOOT
FF
1
2
12
11
PVCC
CPO
EN
ISET
3
4
GND
10
9
VCC
SS
PGOOD
GND FCCM FB
θ JA = 49 o C/W
θ JC = 4 o C/W
Page 5 of 20
www.irf.com
IR Confidential
4/26/10
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