rt9230 ETC-unknow, rt9230 Datasheet

rt9230

Manufacturer Part Number

rt9230

Description

1.5v Advanced Dual Pwm And Dual Linear Power Controller

Manufacturer

ETC-unknow

Datasheet

1.RT9230.pdf (10 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

RT9230

Manufacturer:

FAIRCHILD

Quantity:

1 500

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Download datasheet (230Kb)

1.5V Advanced Dual PWM and Dual Linear Power Controller

General Description

The RT9230 is a 4-in-one power controller optimized

for high-performance microprocessor and computer

applications. The IC integrates two PWM controller,

two linear controllers as well as monitoring and

protection functions into a 28-pin SOP package. The

first PWM controller regulates the microprocessor

core voltage with a synchronous buck converter,

while the second PWM controller supplies the

computer system’s AGP 1.5V or 3.3V bus power with

a standard buck converter. The first linear regulator

provides power for the 1.5V GTL bus and the second

linear regulator provides 1.8V power for the

North/South Bridge core voltage and/or cache

memory circuits.

The RT9230 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 second PWM controller is user-

selectable for output level of 1.5V and 3.3V with

±2.5% accuracy. The linear controllers drives

external N-MOSFET or NPN bipolar for the pass

transistor to provide fixed output voltages of 1.5V

±3% and 1.8V ±3%.

The RT9230 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

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

sensing resistor.

Ordering Information

RT9230

DS9230-03 July 2001

DS(ON)

, which eliminates the need for a current

are

above

Package type

S : SOP-28

Operating temperature range

C: Commercial standard

their

under-voltage

levels.

Features

Switching section

Linear Section

Applications

Pin Configurations

RT9230CS

(Plastic SOP-28)

Part Number

Full Motherboard Power Regulation for Computer

Low-voltage Distributed Power Supplies

4-in-one Regulated Voltages for Microprocessor

Core, AGP Bus, North/South Bridge and/or

Cache Memory, GTL Bus Power

Compatible with HIP6020

Power-good Output Voltage Monitor

5-bit DAC Programmable from 1.3V to 3.5V

± ± ± ± 1% DAC Accuracy

Fast Transient Response

Full 0% to 100% Duty Cycle Driver

Fixed 200kHz Switching Frequency

Adaptive Non-overlapping Gate Driver

Over-current Monitor Uses MOSFET R

Over-voltage Protection Uses Lower MOSFET

Fixed Linear Regulator Output Voltage

MOSFET or NPN Driving Capability

Ultra Fast Response Speed

Under-voltage Protection

Internal Thermal Shutdown

OCSET2

SELECT

UGATE2

PHASE2

PGOOD

VSEN2

FAULT

VSEN4

VID4

VID3

VID2

VID1

VID0

Pin Configurations

TOP VIEW

www.richtek-ic.com.tw

RT9230

DS(ON)

VCC

UGATE1

PHASE1

LGATE1

PGND

OCSET1

VSEN1

FB1

GND

VAUX

DRIVE4

VSEN3

DRIVE3

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rt9230 Summary of contents

Page 1

... Advanced Dual PWM and Dual Linear Power Controller General Description The RT9230 is a 4-in-one power controller optimized for high-performance microprocessor and computer applications. The IC integrates two PWM controller, two linear controllers as well as monitoring and protection functions into a 28-pin SOP package. The ...

Page 2

... RT9230 Absolute Maximum Ratings Supply Voltage PGOOD, FAULT and GATE Voltage Input, Output or I/O Voltage Ambient Temperature Range Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Package Thermal Resistance SOP-28, θ JA Recommended Operating Conditions Supply Voltage Ambient Temperature Range Junction Temperature Range CAUTION: Stresses beyond the ratings specified in “ ...

Page 3

... VCC = 12V, VCC-V UGATE UGATE UGATE I VCC = 12V, V LGATE1 LGATE1 LGATE1 LGATE1 VSEN1 Rising V = 2.0V FAULT/ 4.5V OCSET OCSET I SS VSEN1 Rising VSEN1 Rising Upper/Lower Threshold -4mA PGOOD PGOOD RT9230 Min Typ Max -- -- 0 -1% -- 20mV -- 1 3.3 -- -2 1.125 -- -- 100 -- -- 1 ...

Page 4

... RT9230 Function Block Diagram VSEN3 VAUX _ 75% GATE3 + DRIVE4 _ 1.26V VSEN4 VCC DRIVE2 UGATE2 PHASE2 INHIBIT GATE CONTROL PWM2 COMPEN- SATION _ VSEN2 + ERROR 75 1.5V or 3.3V SELECT www.richtek-ic.com.tw 4 OCSET2 VSEN1 LUV 110% _ LINEAR UNDER 90% VOLTAGE _ 200 µ A 115% OC2 _ OV SOFT-START PWM & ...

Page 5

... The +3.3V input voltage at this pin is monitored for power-on reset (POR) purpose. Connected to +5V input, this pin provides boost current for the two linear regulator output drives in the event bipolar NPN transistors (instead of N-channel MOSFETs) are employed as pass elements. www.richtek-ic.com.tw RT9230 >1V ...

Page 6

... RT9230 GND (Pin 17) Signal ground for the IC. All voltage levels are measured with respect to this pin. DRIVE3 (Pin 18) Connect this pin to the gate of an external MOSEFT. This pin provides the drive for the 1.5V regulator’s pass transistor. VSEN3 (Pin 19) Connect this pin to the output of the 1.5V linear regulator ...

Page 7

... RT9230 Normal OUT1 Voltage DACOUT 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 INHIBIT 2.10 2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 3.10 3.30 3.30 3.40 3.50 www.richtek-ic.com.tw 7 ...

Page 8

... µ F 1000pF 1000pF VCC OCSET1 OCSET1 OCSET2 1.21k 1.21k 8 1 PGOOD UGATE2 27 2 UGATE1 PHASE2 26 PHASE1 D1 RT9230 MBR2535CTL 25 LGATE1 10 VSEN2 24 PGND 22 11 VSEN1 SELECT 21 FB1 7 18 VID0 DRIVE3 6 VID1 19 5 VSEN3 VID2 4 VID3 3 15 VID4 DRIVE4 ...

Page 9

... Dimensions In Millimeters Min Max 17.704 18.110 7.391 7.595 2.362 2.642 0.330 0.508 1.194 1.346 0.229 0.330 0.102 0.305 10.008 10.643 0.381 1.270 RT9230 Dimensions In Inches Min Max 0.697 0.713 0.291 0.299 0.093 0.104 0.013 0.020 0.047 0.053 0.009 0.013 0.004 ...

Page 10

... RT9230 RICHTEK TECHNOLOGY CORP. Headquarter 6F, No. 35, Hsintai Road, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749 www.richtek-ic.com.tw 10 RICHTEK TECHNOLOGY CORP. Taipei Office (Marketing) 8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek-ic.com.tw ...

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