FAN21SV06_12 Datasheet, PDF (2/17 Pages) Fairchild Semiconductor – TinyBuck™ 6 A, 24V Single-Input Integrated Synchronous Buck Regulator with Synchronization Capability

Typical Application Diagram
IN
VIN
C_HF
C_IN
5V_Reg
C4
Power
Good
R5
VIN_Reg
R_RAMP
C5
RAMP
Enable
R_ILIM
EN
ILIM
R_T
R_T
Boot
Diode
Q1
Q2
BOOT
C_BOOT
SW
L
OUT
PWM
+
DRIVER
POWER
MOSFETS
PGND
CLK
FB
C_OUT
R1
R3
C3
AGND
COMP
C2
C1
R2
R_BIAS
Figure 1. Typical Application, Master, V_IN=6.5 V to 24 V
Block Diagram
VIN_Reg
Reg
5V_Reg
ILIM
COMP
FB
IILIM
Int ref
Error
Amplifier
CLK
EN
RAMP
SS
VREF
OSC
RAMP
GEN
5V
Current Limit
Comparator
PWM
Comparator
Boot
Diode
RQ
S
Gate
Drive
Circuit
Summing
Amplifier
Current
Sense
Figure 2. Block Diagram
BOOT
VIN
SW
CBOOT
VOUT
L
AGND
PGND
COUT
© 2006 Fairchild Semiconductor Corporation
FAN21SV06 Rev. 1.0.3
2
www.fairchildsemi.com