IR3710MTRPBF Datasheet, PDF (5/20 Pages) International Rectifier – WIDE INPUT AND OUTPUT, SYNCHRONOUS BUCK REGULATOR

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 1
FF 2
EN ₃
ISET ⁴
GND
12 PVCC
11 CPO
10 VCC
9 SS
PGOOD GND FCCM FB
θ_JA = 49 ^oC/W
θ_JC = 4 ^oC/W
Page 5 of 20
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IR Confidential
1/23/09