AIC AIC1569A Datasheet

AIC1569A

5-bit DAC, Synchronous PWM Power Regulator

 FEATURES

 Compatible with HIP6004.

 Simple Voltage-Mode PWM Control.

 Dual N-Channel MOSFET Synchronous Drive.

 Fast Transient Response.

 ±1% 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.

 APPLICATIONS

 Power Supply for Pentium® II, Power® and

Alpha® Microprocessors.

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

 Low-Voltage Distributed Power Supplies.

 DESCRIPTION

The AIC1569A is a high power, high efficiency

switching regulator controller optimized for high

performance microprocessor applications. It is

designed to drive dual N-channel MOSFETs in a

standard synchronous buck topology. Featuring

a digitally programmable switching regulator, the

AIC1569A 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% over temperature and line

voltage shifts.

The internal oscillator of the AIC1569A 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 an 11MHz

bandwidth and 6V/µS slew rate, which enables

high converter bandwidth for fast transient

response.

The AIC1569A provides adjustable over current

and short circuit protections. It senses the output

current across the on resistance of the upper N-

channel MOSFET without an external low value

sense resistor. It also monitors the output voltage

with a window comparator and issues a power

good signal when the output is within 10% of the

rated output voltage.

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

DS-1569A-00 TEL: [phone] FAX: [phone]

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 ORDERING INFORMATION

AIC1569A

AIC1569A XX

PACKAGE TYPE
S: SMALL OUTLINE

TEMPERATURE RANGE
C: 0°C~70°C

 TYPICAL APPLICATION CIRCUIT

C9

1000pF

R2

2.2K

C8

0.1µF

VID0

VID1

VID2

VID3

VID4

C7

33pF

C6

R6

90.9K
1000pF

VSEN

OCSET

SS

VID0

VID1

VID2

VID3

VID4

COMP

FB

AIC1569A

R7

1.2M

RT

OVP

VCC

LGATE

PGND
BOOT

UGATE

PHASE

PGOOD

GND

R5

3.01K

DC/DC Converter for Pentium

ORDER NUMBER

AIC1569ACS
(PLASTIC SO)

0.1µF

0.1µF



R3

47K

C5

II V

C1

1µF

M2

NDP603AL

R4
15K

C2

R1

47Ω

CORE

PIN CONFIGURATION

TOP VIEW

1

VSEN

2

OCSET

3

SS

4

VID0

VID1

5

6

VID2

7

VID3

8

VID4

9

COMP

10

FB

12V

M1

D1

+

RFP45N03L

1N5820

L1

1µH

C3

1000µF x 3

L2

3µH

+

20

RT

19

OVP

VCC

18

LGATE

17

PGND

16

15

BOOT

14

UGATE

13

PHASE

12

PGOOD

11

GND

5V

C4

1000µF x 8

VOUT

2

 ABSOLUTE MAXIMUM RATINGS

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

Boot Voltage, V

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

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

Recommended Operating Conditions

Supply Voltage, V

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

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

Thermal Information

Thermal Resistance, θ

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

SOIC Package (with 3 in

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

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

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

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

BOOT

....…............................…………..……...................................... 12V±10%

CC

(Typical, Note 1)

JA

2

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

AIC1569A

Note 1:

θ

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

JA

 TEST CIRCUIT

Refer to TYPICAL APPLICATION CIRCUIT.

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

PARAM ETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT

VCC Supply Current

Nominal Supply UGATE Open I

Power-On Reset

VCC Threshold V

Rising V

Oscillator

Free Running Frequency RT Open 170 200 230 KHz

Threshold 1.26 V

OCSET

=4.5V 8.2 9.3 10.2 V

OCSET

°C, unless otherwise specified.)

°°

VCC

1 3 mA

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

Ramp Amplitude RT Open ∆V

OSC

1.5 V

P-P

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