Copyright

© ANPEC Electronics Corp.

Rev. A.2 - Apr., 2008

APL5336

www.anpec.com.tw

1

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.

Source and Sink, 1.5A, Fast Transient Response Linear Regulator

•

Provide Bi-direction Output Currents

-Sourcing and Sinking Current up to 1.5A

•

Built-in Soft-Start

•

Power-On-Reset Monitoring on VCNTL and VIN

pins

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Fast Transient Response

•

Stable with Ceramic Output Capacitors

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±20mV High System Output Accuracy over Load

and Temperature Ranges

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Adjustable Output Voltage by External Resistors

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Current-Limit Protection

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On-Chip Thermal Shutdown

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Shutdown for Standby or Suspend Mode

•

Simple SOP-8 and SOP-8 with Exposed Pad

(SOP-8P) Packages

•

Lead Free and Green Devices Available

(RoHS Compliant)

The APL5336 linear regulator is designed to provide a

regulated voltage with bi-direction output current for DDR-

SDRAM termination voltage. The APL5336 integrates two

power transistors to source or sink load current up to

1.5A. It also features internal soft-start, current-limit, ther-

mal shutdown and enable control functions into a single

chip.

The internal soft-start controls the rising rate of the output

voltage to prevent inrush current during start-up. The

current-limit circuit detects the output current and limits

the current during short-circuit or current overload

conditions. The on-chip thermal shutdown provides ther-

mal protection against any combination of overload that

would create excessive junction temperatures.

The output voltage of APL5336 is regulated to track the

voltage on VREF pin. An proper resistor divider connected

to VIN, GND, and VREF pins is used to provide a half

voltage of VIN to VREF pin. In addition, connect an exter-

nal ceramic capacitor and a open-drain transistor to VREF

pin for external soft-start and shutdown control.

Pulling and holding the voltage on VREF below the en-

able voltage threshold shuts down the output. The output

of APL5336 will be high impedance after being shut down

by VREF or the thermal shutdown function.

Features

General Description

Applications

•

DDRII/III SDRAM Termination Voltage

•

Motherboard and VGA Card Power Supplies

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Setop Box

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SSTL-2/3 Termination Voltage

Pin Configuration

Simplified Application Circuit

V

CNTL

+5V

V

OUT

0.9V / 0.75V

V

IN

+1.8V/+1.5V

Shutdown

GND

VREF

VIN

VOUT

VCNTL

1

2

3

4

6

Enable

APL5336

GND 2

7 VCNTL

VREF 3

VOUT 4

6 VCNTL

5 VCNTL

8 VCNTL

VIN 1

Top View of SOP-8

GND 2

7 NC

VREF 3

VOUT 4

6 VCNTL

5 NC

8 NC

VIN 1

Exposed Pad (connected to GND plane

for better heat dissipation)

Top View of SOP-8P