AS13986

Dual Low-Noise, Low-Dropout Vo ltage Regulator

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Revision 1.02

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Datasheet

1 General Description

The AS13986 dual low-dropout regulator provides up to

150mA at each output using a 2.5 to 5.5V input voltage.

The ultra-low drop-out voltage, low quiescent current,

and low noise make the AS13986 perfect for low-power,

battery-operated applications.

Regulator ground current increases only slightly in drop-

out, extending the battery life in low-power applications.

The device features excellent power supply rejection

(55dB @ 1kHz and 50dB at 10kHz). The high power

supply rejection is maintained down to low input voltage

levels used in battery operated devices.

Integrated shutdown logic control function is available

for each output. In cases where the device is used as a

local regulator it is possible to switch some of the cir-

cuitry into standby mode, thus decreasing total power

consumption.

The AS13986 was specifically designed to work with

low-ESR ceramic capacitors.

The AS13986 is available in a 8-pin WLP package.

Figure 1. AS13986 - Block Diagram

2 Key Features

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Input Voltage: 2.5 to 5.5V

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Dual Output Voltages: 1.2 to 5.0V (in 50mV Steps)

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Ultra-Low Dropout Voltage: 45mV @ 150mA Load,

0.3mV @ 1mA Load

!

Very Low Quiescent Current: 135µA @ No Load,

255µA @ 150mA Load, 2µA In Off Mode

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Guaranteed Output Current up to 150mA

!

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Logic-Controlled Shutdown

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Up to 1.5% Output Voltage Accuracy

!

Integrated Current-Limit and Thermal Overload

Protection

!

100kHz)

!

Supply Voltage Rejection.: 55dB @ 1kHz,

50dB @ 10kHz

!

Stable With Low-ESR Ceramic Capacitors

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Temperature Range: -40 to 125ºC

!

8-pin WLP Package

3 Applications

The device is ideal for powering cordless and mobile

phones, MP3 players, CD and DVD players, PDAs,

handheld computers, digital cameras and any other

hand-held battery-powered device.

AS13986

Thermal

Protection

–

+

Fast

Turn On

Enable

+

–

A2

A3

B3

EN1

B1

EN2

C1

BYPASS

A1

C2, C3

GND