FAN5029 Datasheet, PDF (2/3 Pages) Fairchild Semiconductor – 8-Bit Programmable 2- to 5-Phase Synchronous Buck Controller

Block Diagram
VCC
31
FAN5029
UVLO
SHUTDOWN
& BIAS
GND 18
850mV
–
EN 1
+
DAC+150mV
–
CSREF
+
+
DAC-250mV
–
PWRGD 2
DELAY
TTSENSE 10
VRHOT 9
VRFAN 8
THERMAL
THROTTLING
CONTROL
ILIMIT 11
DELAY 7
RT RAMPADJ
12
13
OSCILLATOR
CURRENT
BALANCING
CIRCUIT
+
CMP
–
+
CMP
–
+
CMP
–
+
CMP
–
+
CMP
–
SET EN
RESET
RESET
RESET
2 / 3 / 4 / 5-PHASE
DRIVER LOGIC
RESET
RESET
19 OD
30 PWM1
29 PWM2
28 PWM3
27 PWM4
26 PWM5
CROWBAR
CURRENT
LIMIT
25 SW1
24 SW2
23 SW3
22 SW4
21 SW5
CURRENT
LIMIT
CIRCUIT
Z
17 CSCOMP
15 CSREF
16 CSSUM
14 LLSET
COMP 5
FBRTN ³
VIDSEL ⁴⁰
PRECISION
REFERENCE
Boot Control
STARTUP
CONTROL
VID
DAC
32
33
34
35
36
37
38
39
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0
DAC
BUFF
4 FB
6 SS
2
FAN5029 Product Brief Rev. 1.0.0
www.fairchildsemi.com