ADP3026 データシートの表示（PDF） - Analog Devices

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ADP3026

High Efficiency Dual Power Supply Controller

Analog Devices 

FEATURES

Wide input voltage range: 5.5 V to 25 V

High conversion efficiency > 96%

Integrated current sense—no external resistor required

Low shutdown current: 19 µA (typical)

Voltage mode PWM with input feed-forward for fast line

transient response

Dual synchronous buck controllers

Built-in gate drive boost circuit for driving external

N-channel MOSFETs

2 fixed output voltages: 3.3 V and 5 V

PWM frequency: 200 kHz

Extensive circuit protection functions

APPLICATIONS

Portable instruments

General-purpose dc-to-dc converters

High Efficiency Dual

Power Supply Controller

ADP3026

GENERAL DESCRIPTION

The ADP3026 is a highly efficient dual synchronous buck

switching regulator controller optimized for converting a

battery or adapter input into multiple supply voltages. The

ADP3026 provides accurate and reliable short-circuit protection

using an internal current sense circuit, which reduces cost and

increases overall efficiency. Other protection features include

programmable soft start, UVLO, and integrated output

undervoltage/overvoltage protection.

The ADP3026 is specified over the 0°C to 70°C commercial

temperature range and is available in a 28-lead TSSOP package.

VIN

5.5V TO 25V

Q3

L2

5V

Q4

FUNCTIONAL BLOCK DIAGRAM

5V LINEAR

REF

5V

SMPS

3.3V

SMPS

Q1

L1

Q2

3.3V

SS5

SS3

PWRGD

POWER-ON

RESET

ADP3026

Figure 1.

Rev. 0

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 that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

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

Tel: 781.329.4700

www.analog.com

Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.

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