ANPEC APW7004KC-TU, APW7004KC-TR Datasheet

APW7004

Synchronous-Rectifier PWM Controller for PentiumTM II Microprocessor

Features

••

•

Simple Single-Loop Control Design-Voltage-

••

Mode PWM Control

••

•

Fast Transient Response

••

• High-Bandwidth Error Amplifier

••

•

5-Bit Digital-to-Analog Output Voltage Selec-

••

tion

TM

6´ 86
Alpha

is a trademark of Cyrix Corporation

TM

is a trademark of Digital Equipment

Corporation

TM

K6

is a trademark of Advanced Micro Devices,

Inc.

Pentium

TM

is a trademark of Intel Corpora­tion
PowerPC

TM

is a trademark of IBM

• Wide Range from1.3VDC to 3.5V

• 0.1V Binary Steps from 2.1VDC to 3.5V
.05V Binary Steps from 1.3VDC to 2.05 V

••

• VID0-4 Input Pins with Pull High Resistors Built

••

DC

DC

DC

in

••

• Power-Good Output Voltage Monitor, PGOOD

••

Pin with an Open Collector Configuration

••

• Over-Voltage and Over-Current Fault Monitors

••

• Uses MOSFET’s R

as Current Sensing,

DS(ON)

No Extra Element Required

••

• Programmable Switching Frequency Setting

••

• 200kHz Free-Running Oscillator

Applications

••

• Power Supply for Pentium

••

Pentium
Alpha

••

• High-Power 5V to 3.xV (or below) DC-DC Regu-

••

TM

II,PowerPC

TM

Microprocessors

lators

••

• Low-Voltage Distributed Power Supplies

••

TM

, Pentium ProTM,

TM

TM

, K6

, 6´86

TM

and

General Description

The APW7004 provides a complete control and mul­tiple protection for a DC-DC converter optimized for
high performance microprocessor applications. It is
designed to drive two N-Channel MOSFETs in a syn­chronous-rectified buck topology. The APW7004 in­tegrates output voltage control, output voltage
programming, monitoring and protection functions into
a single chip IC.
The APW7004 includes a 5-bit digital-to-analog con­verter (DAC) that provides a easily adjustable and
precisely output voltage from 2.1VDC to 3.5V
1 increments and from 1.3 VDC to 2.05 V
05V increments. Any selected output voltage can be
maintained within ±1% accuracy over temperature
and line voltage variations.
With a 200kHz free-running triangle-wave oscillator
and a error amplifier featuring a 15MHz unity-gain
bandwidth and 6V/us slew rate inside the chip,
APW7004 can implement a simple, single feedback
loop, voltage-mode control topology with high tran­sient performance.
The APW7004 also features with multiple protections
against over-current and over-voltage conditions by
inhibiting PWM operation. The APW7004 uses the
R

of the upper MOSFET as the current sensing

DS(ON)

element which eliminates the demend for an extra
component. The APW7004 also monitors the output
voltage using a comparator with hysteresis that tracks
the DAC output and issues a Power Good signal once
the output is within ±10%.

DC

in 0.

DC

in 0.

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.

Copyright  ANPEC Electronics Corp.
Rev. P.4 - Mar., 2001

www.anpec.com.tw1

APW7004

Pin Description

V

OCSET

VID0
VID1
VID2
VID3
VID4

COMP

Ordering Information

APW7004

Handling Code
Temp. Range
Package Code

Block Diagram

SEN

SS

FB

1
2
3
4
5
6
7
8
9

10

20
19
18
17
16
15
14
13
12

11

RT
OVP
V

cc

LGATE
PGND
BOOT
UGATE
PHASE
PGOOD
GND

Package Code
K : SOP - 20
Temp. Range
C : 0 to 70 C

°

Handling Code
TU : Tube TR : Tape & Reel

V

SEN

1

110%

90%

115%

OC

DETN
(Power on Reset)

DAC OUT

DETN
(Power on Reset)

RT

VID0
VID1
VID2
VID3
VID4

SS

FB

3

4

TTL D/A

5

CONVERER

6

(DAC)

7
8

10

920

COMP

Copyright  ANPEC Electronics Corp.
Rev. P.4 - Mar., 2001

+

-

+

-

+

-

ERRAMP

+

-

CP2

CP2

CP2

OSC

SOFT

START

OVP

+
+

-

OVP

DETN, OC

CP4

PHASE

V

CC

1819

200µA

Power on

Reset

CP1

+

-

UGATE

DRIVER

DETN
(Power on Reset)

OC

PGOOD

12

OCSET

2

BOOT

15

UGATE

14

PHASE

13

LGATE

17

PGND

16

GND

11

www.anpec.com.tw2

APW7004

Absolute Maximum Ratings

Symbol Parameter Rating Unit

V

CC

V

–V

BOOT

,

V

V

I

T

A

T

J

T

STG

T

S

Thermal Characteristics

Symbol Parameter Value Unit

R

JA

θ

Supply Voltage 15 V
Boot Voltage 15 V

PHASE

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

O

Operating Ambient Temperature Range 0 to 70
Junction Temperature Range 0 to 150
Storage Temperature Range -65 to +150
Soldering Temperature 300,10 seconds

Thermal Resistance in Free Air

SOP

110

°C
°C
°C
°C

°C/W

SOP (with 3in2 of Copper)

86

Electrical Characteristics

Recommended operating conditions , unless otherwise noted

Symbol Parameter Test Conditions
V

Supply Current

CC

I

Nominal Supply UGA TE and LGATE open 3 mA

CC

Power-on Reset

Rising VCC Threshold Vocset=4.5V 9.0 V
Falling VCC Threshold Vocset=4.5V 8.8 V

Oscillator

Free Running Frequency RT= Open 185 200 215 kHz
Ramp Amplitude RT= Open 2 V

V

∆

OSC

Reference and DAC

DAC(VID0-VID4) Input Low Voltage 0.8 V
DAC(VID0-VID4) Input High Voltage 3.0 V
DACOUT Voltage acc ur a cy -1.0 + 1.0 %

Error Amplifier

DC Gain 88 dB

GBW Gain-Bandwidth Product 15 MHz

SR Slew Rate COMP=20pF 6

APW7004

Min. Typ. Max.

Unit

P-P

V/µs

Copyright  ANPEC Electronics Corp.
Rev. P.4 - Mar., 2001

www.anpec.com.tw3