IR3637ASPBF Datasheet, PDF (14/19 Pages) International Rectifier – 1% ACCURATE SYNCHRONOUS PWM CONTROLLER

IR3637ASPbF
TYPICAL APPLICATION
Two Supplies Application, Vcc=Vc=12V, Vin=5V
12V
5V
C3
C4
C1
Vcc Vc
HDrv
Q1
SS/SD U1
D2
L1
C8
IR3637A _LDrv
Q2
Comp
C9
Fb
Gnd
R4
R6
R5
Vout
C7
Figure 13 - Typical application using 12V for biasing both Vcc and Vc and 5V for Bus Voltage
For proper start up the 5V rail needs to start before 12V
14
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