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X80200 Datasheet, PDF (1/16 Pages) Intersil Corporation – Power Supply Swquencer with Power-up System Mnitoring
X80200, X80201, X80202, X80203, X80204
®
Data Sheet
January 21, 2005
FN8154.0
Power Supply Sequencer with Power-up
System Monitoring
The X80200 power sequencer provides a flexible approach
for handling difficult system power-up conditions. The
X80200 includes control of up to three voltage supplies and
can be cascaded to control additional supplies. The device
contains independent undervoltage lockout for each
controlled voltage.
The three voltage control circuits allow sequencing for
primary, core, and I/O voltages. The core and I/O supplies
are linked together with a comparator or a timer allowing a
tight coupling between these two supplies. The sequencing
may be either voltage based or time based.
The X80200 contains separate charge pumps to control
external N-channel power FETs for each of the supplies. The
charge pumps provide the high gate control voltage
necessary for efficient operation of the FET switches.
The X80200 turns on the primary voltage to the system
when the voltage source is steady. This primary FET switch
turn-on can be delayed with an external RC circuit. For the
secondary voltage sources, the device has a built-in “core-
up-first and core-down-last” sequencing logic which is ideal
for high performance processors, DSPs and ASICs.
The serial bus can be used to monitor the status or turn off
each of the external power switches. The X80200 has 3
slave address bits that allow up to 8 devices to be connected
to the same bus.
Pinout
20 LD TSSOP
TOP VIEW
SETV
1
REF
2
A0
3
GND
4
A1
5
A2
6
NC
7
SDA
8
SCL
9
READY
10
20
VDDL
19
VDDM
18
VDDH
17
VFB
16
DNC
15
GATE_M
14
GATE_H
13
GATE_L
12
ENS
11
GATEH_EN
Features
• Sequence three voltage supplies independently
- Core and Logic I/O VCC power sequencer for processor
supplies
- Power up and power down control
- Voltage monitors have undervoltage lockout
- Internal charge pump drives external N-channel FET
switches
- Cascadable to sequence more than 3 supplies
- Time based or voltage based sequencing
• Status register bits monitor gate output status
• SMBus compatible Interface
• Slave address identification for up to 8 power sequencers
(24 supplies) on the same bus
• Surface mount 20-pin TSSOP Package
Applications
• Distributed Power Supply Designs
• Multi-voltage systems
• Multiprocessor systems
• Embedded Processor Applications
• Digital Signal Processors, FPGAs, ASICs, Memory
Controllers
• N + 1 Redundant Power Supplies
• Support for SSI – Server System Infrastructure
Specifications
• -48V Hotswap Power Backplane/Distribution
• Card Insertion Detection and Power
• Power Sequencing DC-DC Supplies
• Databus Power Interfacing
• Custom Industrial Power Backplanes
• Other: ATE, Data Acquisition, Mass Storage, Servers,
Data com, Wireless Basestations
Ordering Information
PART NUMBER UVLOH
X80200V20I
4.5
X80201V20I
4.5
UVLOM
3.0
2.25
X80202V20I
3.0
2.25
X80203V20I
3.0
2.25
X80204V20I
3.0
0.9
UVLOL
0.9
0.9
1.7
0.9
0.9
PACKAGE
TSSOP
TSSOP
TSSOP
TSSOP
TSSOP
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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