REV. PrB

3/12/02

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

a

Preliminary Technical Data

ADP3026

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

High-Efficiency Notebook Computer

Power Supply Controller

FUNCTIONAL BLOCK DIAGRAM

FEATURES

FEATURES

FEATURES

FEATURES

FEATURES

Wide Input Voltage Range: 6.5 V to 25 V

Wide Input Voltage Range: 6.5 V to 25 V

Wide Input Voltage Range: 6.5 V to 25 V

Wide Input Voltage Range: 6.5 V to 25 V

Wide Input Voltage Range: 6.5 V to 25 V

High Conversion Efficiency > 96%

High Conversion Efficiency > 96%

High Conversion Efficiency > 96%

High Conversion Efficiency > 96%

High Conversion Efficiency > 96%

Int

Int

Int

Int

Integrated Current Sense—No External Resistor Re-

egrated Current Sense—No External Resistor Re-

egrated Current Sense—No External Resistor Re-

egrated Current Sense—No External Resistor Re-

egrated Current Sense—No External Resistor Re-

quired

quired

quired

quired

quired

Low Shutdown Current: 14

Low Shutdown Current: 14

Low Shutdown Current: 14

Low Shutdown Current: 14

Low Shutdown Current: 14

A (Typical)

A (Typical)

A (Typical)

A (Typical)

A (Typical)

Voltage Mode PWM with Input Feed Forward for Fast

Voltage Mode PWM with Input Feed Forward for Fast

Voltage Mode PWM with Input Feed Forward for Fast

Voltage Mode PWM with Input Feed Forward for Fast

Voltage Mode PWM with Input Feed Forward for Fast

Line Transient Response

Line Transient Response

Line Transient Response

Line Transient Response

Line Transient Response

Dual Synchronous Buck Controllers with PWM/

Dual Synchronous Buck Controllers with PWM/

Dual Synchronous Buck Controllers with PWM/

Dual Synchronous Buck Controllers with PWM/

Dual Synchronous Buck Controllers with PWM/

Power-Saving Mode Operation

Power-Saving Mode Operation

Power-Saving Mode Operation

Power-Saving Mode Operation

Power-Saving Mode Operation

Built-In Gate Drive Boost Circuit for Driving Exter-

Built-In Gate Drive Boost Circuit for Driving Exter-

Built-In Gate Drive Boost Circuit for Driving Exter-

Built-In Gate Drive Boost Circuit for Driving Exter-

Built-In Gate Drive Boost Circuit for Driving Exter-

nal

nal

nal

nal

nal

N-Channel MOSFETs

N-Channel MOSFETs

N-Channel MOSFETs

N-Channel MOSFETs

N-Channel MOSFETs

Two Fixed Output Voltages: 3.3 V, 5 V

Two Fixed Output Voltages: 3.3 V, 5 V

Two Fixed Output Voltages: 3.3 V, 5 V

Two Fixed Output Voltages: 3.3 V, 5 V

Two Fixed Output Voltages: 3.3 V, 5 V

PWM Frequency: 300 kHz

PWM Frequency: 300 kHz

PWM Frequency: 300 kHz

PWM Frequency: 300 kHz

PWM Frequency: 300 kHz

Extensive Circuit Protection Functions

Extensive Circuit Protection Functions

Extensive Circuit Protection Functions

Extensive Circuit Protection Functions

Extensive Circuit Protection Functions

28-Lead TSSOP Package

28-Lead TSSOP Package

28-Lead TSSOP Package

28-Lead TSSOP Package

28-Lead TSSOP Package

APPLICATIONS

APPLICATIONS

APPLICATIONS

APPLICATIONS

APPLICATIONS

Notebook Computers and PDAs

Notebook Computers and PDAs

Notebook Computers and PDAs

Notebook Computers and PDAs

Notebook Computers and PDAs

Portable Instruments

Portable Instruments

Portable Instruments

Portable Instruments

Portable Instruments

General Purpose DC-DC Converters

General Purpose DC-DC Converters

General Purpose DC-DC Converters

General Purpose DC-DC Converters

General Purpose DC-DC Converters

GENERAL DESCRIPTION

The ADP3026 is a highly efficient dual synchronous buck

switching regulator controller optimized for converting the

battery or adapter input into the system supply voltages re-

quired in notebook computers. The ADP3026 uses a

dual-mode PWM/Power Saving Mode architecture to maintain

efficiency over a wide load range.

The ADP3026 provides accurate and reliable short circuit

protection using an internal current sense circuit, which re-

duces cost and increases overall efficiency. Other protection

features include programmable soft-start, UVLO, and inte-

grated output undervoltage/overvoltage protection.

POWER-ON

RESET

6.5V TO 25V

3.3V

SS3

Q1

Q2

Q3

SS5

Q4

5V

L1

L2

PWRGD

ADP3026

REF

5V LINEAR

3.3V

SMPS

5V

SMPS

PRELIMINARY TECHNICAL DATA