AIC AIC1567CS, AIC1567 Datasheet

AIC1567

5-bit DAC, Synchronous PWM Power Regulator

with Linear Controller

Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw

DS-1567-00 TEL: [phone] FAX: [phone]

1

 FEATURES

 Switching Regulator and Low Dropout Linear

Regulator on single chip.

 Simple Voltage-Mode PWM Control.

 Dual N-Channel MOSFET Synchronous Drive.

 Fast Transient Response.

 ±1.0% 5-Bit Digital-to-Analog Output Voltage.

 Adjustable Current Limit Without External Sense

Resistor.

 Full 0% to 100% Duty Ratio.

 200KHz Free-Running Oscillator Programmable

up to 350KHz.

 Power-Good Output Voltage Monitor.

 Short Circuit Protection with Low Short Circuit

Output Current.

 APPLICATIONS

 Power Supply for Pentium II, Power PC and

Alpha Microprocessors.

 High-Power 5V to 3.xV DC/DC Regulators.

 Low-Voltage Distributed Power Supplies.

 DESCRIPTION

The AIC1567 is a high power, high efficiency

switching regulator controller optimized for high

performance microprocessor applications. It is

designed to drive dual N-channel MOSFET in a

standard synchronous buck topology.

Featuring a low dropout linear regulator and a

digitally programmable switching regulator, the

AIC1567 includes monitoring and protection

capabilities in addition to all the essential

synchronous PWM control functions.

The internal 5-bit Digital-to-Analog Converter

(DAC) adjusts the output voltage from 2.0V to

3.5V in 0.1V increments and 1.3V to 2.0V in

0.05V increments. The precision reference and

voltage-mode control can provide output

regulation within ±1.0% over temperature and

line voltage shifts.

The internal oscillator of the AIC1567 free-runs

at 200KHz and can be adjusted up to 350KHz.

The resulting PWM duty ratio ranges from 0% to

100%. The error amplifier features a 11MHz

bandwidth and 6V/µS slew rate, which enables

high converter bandwidth for fast transient

response.

AIC1567

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 ORDERING INFORMATION

AIC1567 XX

PACKAGE TYPE
S: SMALL OUTLINE

TEMPERATURE RANGE
C: 0°C~70°C

PIN CONFIGURATION

ORDER NUMBER

AIC1567CS
(PLASTIC SO)

TOP VIEW

RT

OVP

VCC

LGATE

PGND

BOOT

UGATE

PHASE

PGOOD

GND

LIDRI

VLFB

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

VSEN

OCSET

SS

VID0

VID1

VID2

VID3

VID4

COMP

FB

CLP

CLN

9

10

11

12

16

15

14

13

 TYPICAL APPLICATION CIRCUIT

VSEN RT
OCSET OVP
SS VCC

VID0 LGATE

VID1 PGND
VID2 BOOT

VID3 UGATE
VID4 PHASE
COMP PGOOD
FB GND
CLP LIDRI
CLN VLFB

C2

0.1

µ

F

C1

1

µ

F

C5

1000pF

C7

33pF

C6

1000pF

0.1µF

+

C1

1000

µ

F

5V

137
1%

R3

47K

R5

3.01K

Ω

R6

90.9K

R2

2.2K

C8

R1

237
1%

R7

+

1000µF

x 8

R4
15K

D1

1N5820

M2

NDP603AL

VID0

VID1
VID2

VID3
VID4

V

CORE

V

I/O

3.3V
10A

12V

AIC1567

M3
FD3055

0.1µF

R8

1.2M

C3
1000µF x 3

3µH

L2

M1

RFP45N03L

+

L1

1

µ

H

5V

C4

Pentium



II V

CORE

and V

I/O

DC/DC Converter

AIC1567

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 ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VCC....…..................................……………........................................... 15V

Boot Voltage, V

BOOT

………...................……………...................................................... 15V

Input, Output, or I/O Voltage .....…….........……………......…....... GND - 0.3V to VCC+0.3V

ESD Classification ...........................…………......................……......................... Class 2

Recommended Operating Conditions

Supply Voltage, VCC....…...................…………………..........................…….......... 12V±10%

Ambient Temperature Range ....……………………............................................ 0°C ~ 70°C

Junction Temperature Range ....…………………….......................................... 0°C ~100°C

Thermal Information

Thermal Resistance, θJA (Typical, Note 1)

SOIC Package .....................…….........……………………………….........…. 100°C/W

SOIC Package (with 3 in

2

of Copper) …………………………………......….. 90°C/W

Maximum Junction Temperature (Plastic Package) ….……………….…................... 150°C

Maximum Storage Temperature Range ……………………..……......…......... -65°C~150°C

Maximum Lead Temperature (Soldering 10 sec) …………………………......…......... 300°C

Note 1: symbol

θ

JA

is measured with the component mounted on an evaluation PC board in free air.

 TEST CIRCUIT

Refer to TYPICAL APPLICATION CIRCUIT.

 ELECTRICAL CHARACTERISTICS (VCC= 12V, Ta=25°

°°

°C, unless otherwise

specified.)

PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT

VCC Supply Current

Nominal Supply UGATE Open I

VCC

2mA

Power-On Reset

VCC Threshold V

OCSET

=4.5V 7 8.5 V

Rising V

OCSET

Threshold 1.26 V

Oscillator

Free Running Frequency RT Open 170 200 230 KHz

Total Variation 6KΩ< RT<200KΩ -20 +20 %

Ramp Amplitude RT Open ∆V

OSC

1.5 V

P-P