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參數(shù)資料
| 型號(hào)： | RT9231A |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 163K |
| 代理商： | RT9231A |
RT9231A
DS9231A-02 July 2001
www.richtek.com
1
Advanced PWM and Triple Linear Power Controller
General Description
The RT9231A is a 4-in-one power controller
optimized for high-performance microprocessor and
computer applications. The IC integrates a PWM
controller, triple linear controller as well as monitoring
and protection functions into a 28-pin SOP package.
The PWM controller regulates the microprocessor
core voltage with a synchronous buck converter. The
first linear controller supplies the computer system’s
AGP 1.5V or 3.3V bus power. The second linear
controller provides power for the 1.5V GTL bus and
the 3rd linear controller provides 1.8V power for the
North/South Bridge core voltage and/or cache
memory circuits.
The RT9231A features an Intel-compatible, TTL 5-bit
programmable DAC that adjusts the core voltage
from 2.1V to 3.5V in 0.1V increments and from 1.3V
to 2.05V in 0.05V steps. The 5-bit DAC has a typical
±
1% tolerance. The first linear controller is user-
selectable for output level of 1.5V and 3.3V with
±
2.5% accuracy. The other two linear controllers
provide fixed output voltages of 1.5V
±
3% and 1.8V
±
3%. All the three linear controllers drive external N-
MOSFET or NPNs bipolar for the pass transistor.
The RT9231A monitors all the output voltages. A
power-good signal is issued when the core voltage is
within
±
10% of the DAC setting and the other levels
are above their under-voltage levels. Additional build-
in over-voltage protection for the core output uses the
lower MOSFET to prevent output voltage above
115% of the DAC setting. The PWM over-current
function monitors the output current using the voltage
drop
across
the
MOSFET’s
eliminates the need for a current sensing resistor.
R
DS(ON)
,
which
Applications
z
Full Motherboard Power Regulation for Computer
z
Low-voltage Distributed Power Supplies
Features
z
4-in-one Regulated Voltages for Microprocessor
Core, AGP Bus, North/South Bridge and/or
Cache Memory, GTL Bus Power
z
Compatible with HIP6021A
z
Power-good Output Voltage Monitor
Switching section
z
5-bit DAC Programmable from 1.3V to 3.5V
z
±
1% DAC Accuracy
z
Fast Transient Response
z
Full 0% to 100% Duty Cycle Driver
z
Fixed 200kHz Switching Frequency
z
Adaptive Non-overlapping Gate Driver
z
Over-current Monitor Uses MOSFET R
DS(ON)
z
Over-voltage Protection Uses Lower MOSFET
Linear Section
z
Fixed or User-adjustable Linear Regulator
Output Voltage
z
MOSFET and NPN Driving Capability
z
Ultra Fast Response Speed
z
Under-voltage Protection
z
Internal Thermal Shutdown
Pin Configurations
Part Number
Pin Configurations
RT9231ACS
(Plastic SOP-28)
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11
12
17
18
19
20
21
22
23
24
25
26
27
28
13
14
16
15
FIX
VID4
VID3
VID2
VID1
VID0
PGOOD
SD
VSEN2
SELECT
DRIVE2
SS
FAULT
VSEN4
LGATE1
PGND
OCSET1
VSEN1
FB1
NC
VCC
UGATE1
PHASE1
VSEN3
DRIVE3
GND
VAUX
DRIVE4
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| RT9231-CS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Advaned PWM and Triple Linear Power Controller |
| RT9231-MS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Advaned PWM and Triple Linear Power Controller |
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| RT9232A | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Programmable Frequency Synchronous Buck PWM Controller |
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