FAN21SV04 Fairchild Semiconductor, FAN21SV04 Datasheet - Page 2

• Manufacturer Part Number: FAN21SV04
• Description: This part is covered in Fairchild's href="http://www
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN21SV04 • Rev. 1.0.2
Typical Application Diagram
Block Diagram
VIN_Reg
5V_Reg
COMP
RAMP
ILIM
CLK
IN
EN
FB
C
HF
Enable
Power
Good
OSC
C
SS
IN
R
ILIM
Reg
V
REF
R
R5
RAMP
RAMP
GEN
C4
Int ref
Error
Amplifier
Figure 1. Typical Application as Master at V
R
T
I
ILIM
VIN_Reg
5V_Reg
C5
RAMP
ILIM
VIN
EN
R
T
PWM
Comparator
Current Limit
Comparator
5V
Summing
Amplifier
AGND
Figure 2. Block Diagram
DRIVER
PWM
Diode
Boot
2
+
Current
Sense
R
S
COMP
Q
Q1
Q2
C2
MOSFETS
POWER
Circuit
Diode
Drive
Gate
Boot
C1
IN
=6.5V to 24V
R2
CLK
SW
PGND
FB
BOOT
R3
C
BOOT
R
AGND
PGND
C
BOOT
V
SW
L
R1
BIAS
IN
OUT
C3
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C
BOOT
L
C
OUT
OUT
V
OUT