FAN6520A_06 Datasheet, PDF (3/15 Pages) Fairchild Semiconductor – Single Synchronous Buck PWM Controller

Typical Application
+5V
VCC
5
C_VCC
R_OCSET
COMP/OCSET
7
FAN6520A
1 ^BOOT
D_BOOT
C_BOOT
Q1
2 ^HDRV
SW
8
Q2
LDRV
4
GND
3
6 ^FB
C_BULK
CHF
L_OUT
+V_OUT
C_OUT
R_S
R_F
C_F
C_I
R_OFFSET
Figure 1. Typical Application
VCC
COMP/OCSET
FB
SAMPLE
& HOLD
POR / SOFT-START
OC
0.8V
20A
ERROR
AMP
PWM
OSC
PWM
GATE
CONTROL
LOGIC
BOOT
HDRV
SW
V_CC
LDRV
GND
Figure 2. Functional Block Diagram
© 2005 Fairchild Semiconductor Corporation
FAN6520A Rev. 1.0.5
3
www.fairchildsemi.com