Datasheet

UCD9248
SLVSA33A –JANUARY 2010–REVISED AUGUST 2012 www.ti.com
PIN DESCRIPTIONS
PIN NO. PIN NAME DESCRIPTION
1 ADCref ADC Decoupling capacitor – tie 0.1 µF capacitor to ground
2 CS-4A Power stage 4A current sense input and input to analog comparator 4
3 CS-3A Power stage 3A current sense input and input to analog comparator 3
4 CS-2A Power stage 2A current sense input and input to analog comparator 2
5 V
in
/I
in
Input supply sense, alternates between V
in
and I
in
6 Vtrack Voltage track input
7 Temperature Temperature sense input
8 V33DIO Digital I/O 3.3 V supply
9 DGND1 Digital Ground
10 SEQ-3 Sequencing Input/Output
11 SRE-1B Synchronous rectifier enable output 1B, active high
12 SRE-1A Synchronous rectifier enable output 1A, active high
13 nRESET Active low device reset input, pullup to 3.3V with 10 kΩ resistor
14 TRCK JTAG Test return clock
15 FLT-1A External fault input 1A, active high
16 FLT-1B External fault input 1B, active high
17 FLT-2A External fault input 2A, active high
18 FLT-2B External fault input 2B, active high
19 PMBus_Clock PMBus Clock, pullup to 3.3 V with 2 kΩ resistor
20 PMBus_Data PMBus Data, pullup to 3.3 V with 2 kΩ resistor
21 DPWM-1A Digital Pulse Width Modulator output 1A
22 DPWM-1B Digital Pulse Width Modulator output 1B
23 DPWM-2A Digital Pulse Width Modulator output 2A
24 DPWM-2B Digital Pulse Width Modulator output 2B
25 DPWM-3A Digital Pulse Width Modulator output 3A
26 DPWM-3B Digital Pulse Width Modulator output 3B
27 DPWM-4A Digital Pulse Width Modulator output 4A
28 DPWM-4B Digital Pulse Width Modulator output 4B
29 FLT-3A External fault input 3A, active high
30 Sync-Out Synchronization output from DPWM
31 Sync-In Synchronization input to DPWM
32 SEQ-1 Sequencing Input/Output
33 SRE-4A Synchronous rectifier enable output 4A, active high
34 DGND2 Digital Ground
35 PMBus_Alert PMBus Alert, pullup to 3.3V with 2 kΩ resistor
36 PMBus_Cntl PMBus Control, pullup to 3.3V with 2 kΩ resistor
37 SRE-2B Synchronous rectifier enable output 2B, active high
38 SRE-3A Synchronous rectifier enable output 3A, active high
39 TMUX-0 Temperature multiplexer select output SO, Vin/Iin select
40 TMUX-1 Temperature multiplexer select output S1
41 FLT-3B External fault input 3B, active high
42 FLT-4A External fault input 4A, active high
43 FLT-4B External fault input 4B, active high
44 TCK JTAG Test clock
45 TDO JTAG Test data out
46 TDI JTAG Test data in tie to V33D with 10 kΩ resistor
47 TMS JTAG Test mode select – tie to V33D with 10 kΩ resistor
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