ir3637s International Rectifier Corp., ir3637s Datasheet - Page 14

• Manufacturer Part Number: ir3637s
• Description: 1% Accurate Synchronous Pwm Controller
• Manufacturer: International Rectifier Corp.

IR3637SPBF
TYPICAL APPLICATION
Two Supplies Application, Vcc=Vc=12V, Vin=5V
14
12V
Figure 13 - Typical application using 12V for biasing both Vcc and Vc and 5V for Bus Voltage
C8
C9
R4
C3
SS/SD
Comp
For proper start up the 5V rail needs to start before 12V
Vcc
IR3637
Gnd
U1
Vc
HDrv
LDrv
Fb
C4
D2
www.irf.com
R5
Q1
Q2
C1
R6
L1
C7
06/16/05
Rev.1.1
5V
Vout