Distributed Power Hot-Swap Controller
Description
SUMMIT
MICROELECTRONICS, Inc.
Distributed Power Hot-Swap Controller
SMT4004
FEATURES
l Programmable Voltage and Current Monitoring l Programmable Watchdog and Longdog Timers
w Monitors 4 independent supplies w Programmable Host-side Under- and OverVoltage Thresholds w Programmable Card-side Under-Voltage Monitors w Programmable Card-side Circuit Breaker Delay and QuickTrip™ Threshold Levels
l Programmable Card-side Trakker Function
(0 to 6.
4 seconds)
l Operates From Any One of Four Supply Voltages l Nonvolatile Fault Register
w Records Source of Any Interrupt w Readable in “Dead Board” Environment
l All Communications to Configuration Registers
and Memory Array are via 2-wire Serial Interface
w Programmable Slew Rate Control w Guarantees and Enforces Supply Differential Tracking
FUNCTIONAL BLOCK DIAGRAM
PWR_ON FORCE_SD SEATED1# SEATED2# 33 UV_OVERRIDE 12 27 10 11 MR# IRQ_CLR# 5 6 7 IRQ#
13 RST1# VO1 20 CB1 37 VI1 41 SUPPLY MANAGER #1 14 RST2# RESET & STATUS OUTPUT CONTROL LOGIC SEQUENCE ENABLE LOGIC 15 RST3# 16 RST4# 3 CROWBAR
25 CBFAULT 26 HEALTHY# 32 VGATE1 31 VGATE2 CHARGE PUMP & VGATE CONTROL 30 VGATE3 29 VGATE4 28 VGG_CAP 24 ENABLE
VO2 21 CB2 36 VI2 40
SUPPLY MANAGER #2
VO3 22 CB3 35 VI3 39
SUPPLY MANAGER #3
VO4 23 CB4 34 VI4 38
SUPPLY MANAGER #4
TRAKKER LOGIC
9
TRKR_IRQ#
48 WLDI TIMER LOGIC POWER SUPPLY ARBITRATION 1 2 4 LDO# WDO# 1.
25VREF
43 A0 MEMORY & 2-WIRE BUS INTERFACE 44 A1 45 A2 46 SDA 47 SCL 42 8 18 DGND 19 AGND 17 PGND
2049 BD 2.
1
VDD_CAP PGND
©SUMMIT MICROELECTRONICS, Inc.
, 2000 • 300 Orchard City Dr.
, Suite 131 • Campbell, CA 95008 • Phone 408-378-6461 • FAX 408-378-6586 • www.
summitmicro.
com Characteristics subject to change without notice 2049 2.
2 9/13/00
1
SMT4004
DESCRIPTION
The SMT4004 is a fully integrated programmable voltage manager IC, providing supervisory functions and tracking control for up to four independent power supplies.
The four internal managers perform the following functions: Monitor source (bus-side) ...
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