FAN5033 Datasheet, PDF (2/39 Pages) Fairchild Semiconductor – 8-Bit Programmable, 2- to 3-Phase, Synchronous Buck Controller

Block Diagram
VCC
FAN5033
UVLO
SHUTDOWN
& BIAS
GND
Threshold
–
EN
+
DAC+OV P
–
CSREF
+
+
DAC - UV P
–
PWRGD
DEL AY
RT RAM PADJ
OSCILL ATOR
CURREN T
BALANCING
CIRCUI T
+
CM P
–
+
CM P
–
+
CM P
–
SET EN
RESE T
RESE T
RESE T
2 / 3 - PHASE
DRIVER LOGIC
OD
PWM1
PWM2
PWM3
CROWBAR
CURREN T
LIMI T
SW1
SW2
SW3
NC
ILIMI T
DEL AY
CURREN T
LIMI T
CIRCUI T
Z
CSCOM P
CSREF
CSSUM
COM P
FB RTN
VIDSE L
PRECISION
REFERENCE
Boot Control
START-UP
CONTRO L
VID
DAC
DAC
BUFF
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0
Figure 1: Block Diagram
© 2007 Fairchild Semiconductor 2006
FAN5033 Rev. 1.0.0
2 of 39
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SS
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