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SMT4004: Quad Trakking™ Power Supply Manager - Summit Microelectronics


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Text version of the page
Untitled
PI
SUMMIT
MICROELECTRONICS, Inc.
SMT4004
QUAD TRAKKINGTM POWER SUPPLY MANAGER
FEATURES & APPLICATIONS
INTRODUCTION
• Programmable Softstart, Tracking and Voltage Monitoring Functions
• Controls 4 Independent Supplies Down to 0.9V
• Programmable Bus-Side and Card-Side UV and OV Thresholds
• Guarantees Differential Supply Tracking
• Operates From Any One of Four Supply Voltages down to 2.7V
• Four independent RST#s, two IRQ#s, CROWBAR and Circuit breaker functions
• I2C 2-Wire Serial Bus Interface for Programming, Power On/Off and Operational Status
• 256X8 Nonvolatile EEPROM Memory Array Applications
• Power Supply Management
• Telecom/Datacom Motherboards/Servers
• Mezzanine Line Cards
• Compact PCITM Hot Swap Control
• Network Processors, DSPs, ASICs
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) voltages for under-voltage and over-voltage conditions, monitor back end (card-side) voltages for under-voltage conditions, ensure voltages to the card-side track within specified parametric limits, and provide status information to a host processor.
The SMT4004 incorporates nonvolatile programmable circuits for setting all monitored thresholds for each manager. Individual functions are also programmable allowing Interrupts or Reset conditions to be generated by many combinations of events. Also included are nonvolatile fault status registers and a 2K-bit (256 byte) nonvolatile memory.
User programming of configuration and control values is simplified with the interface adapter (SMX3200) and Windows GUI software obtainable from Summit Microelectronics.
SIMPLIFIED APPLICATIONS DRAWING
100
100
->
10nF
| 41 | | 37 | | 32 | | 20 |_| 39 | [35] | 30 | | 22 | | 38 | | 34 | | 29 | | 23 |
o o
c c
o O ś
C/3
10
D-QĎ
n>—El
d-m
O—Gď d-DE
o
VGATE1 VI3
CB3 VGATE3
VGATE4
VO4
SEATED1# SEATED2#
MR#
SCL
LDO#
SDA
TRAKKERTM
WDO#
ENABLE
SMT4004
IRQ#
TRKR_IRQ# |
HEALTHY#
RST1#
RST2#
IRQ_CLR#
VGATE2
GND
VGG_CAP VDD_CAP
PWR_ON
RST3# RST4#
-a -o -o -o -o -o -o -o -o
o
<5
o
ro o
a.
<
c/3 ■a ro O
o-
o
40 3U 21
18
28 42
10nF
100
T
Note: This is an applications example only. Some pins, components and values are not shown.
© SUMMIT Microelectronics, Inc. 2005 • 1717 Fox Drive • San Jose CA 95131 • Phone 408 436-9890 • FAX 408 436-9897
2049 5.2 10/21/05
1

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