FAN50FC3 Datasheet, PDF (2/21 Pages) Fairchild Semiconductor – 8-Bit Programmable, 2- to 3-Phase FastvCore™ Buck Controller

Block Diagram
VCC
GND
UVLO
SHUT DOWN
& BIAS
Threshold
EN
DAC + OVP
CSREF
RT
RAMPADJ
OSCILLATOR
CURRENT
BALANCE
CIRCUIT
SET EN
RESET
RESET
RESET
2/3 PHASE
LOGIC
OD
PWM1
PWM2
PWM3
DAC - UVP
PWRGD
DELAY
VOSADJ
CR OW BAR
CURR ENT
LIM IT
SW1
SW2
SW3
ILIMIT
DELAY
COMP
FBRTN
VIDSEL
CURRENT
LIMIT
CIRCUIT
PRECISION
REFERENCE
BOOT CONTROL
START UP
CONTROL
VID DAC
Z
+
+
-
-
+
DAC
BUFF
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0
CSCOMP
CSREF
CSSUM
FB
SS
© 2007 Fairchild Semiconductor Corporation
FAN50FC3 Rev. 1.0.0
Figure 1. Block Diagram
2 of 21
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