AS1374

Dual 200mA, Low-Noise, High-PSRR, Low Dropout Regulators

Datasheet

www.austriamicrosystems.com/LDOs/AS1374

Revision 1.8

1 - 18

1 General Description

The AS1374 is a low-noise, low-dropout linear regulator with two

separated outputs. Designed to deliver 200mA continuous output

current at each output pin, the LDOs can achieve a low 120mV

dropout for 200mA load current and are designed and optimized to

work with low-cost, small-capacitance ceramic capacitors.

An integrated P-channel MOSFET pass transistor allows the devices

to maintain extremely low quiescent current (30µA).

The AS1374 uses an advanced architecture to achieve ultra-low

of better than 85dB (@ 1kHz).

Two active-High enable pins allows to switch on or off each output

independently from each other.

The AS1374 requires only 1µF output capacitor for stability at any

load.

The device is available in a 6-bump WLP package.

Figure 1. AS1374 - Typical Application Circuit

2 Key Features



Preset Output Voltages: 1.2V to 3.6V (in 50mV steps)





Power-Supply Rejection Ratio: 85dB @ 1kHz



Low Dropout: 120mV @ 200mA Load



Stable with 1µF Ceramic Capacitor for any Load

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Guaranteed 200mA output



Pull-Down Option in Shutdown (factory set)

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Extremely-Low Quiescent Current: 30µA

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Excellent Load/Line Transient



Overcurrent and Thermal Protection



6-bump WLP Package

3 Applications

The devices are ideal for mobile phones, wireless phones, PDAs,

handheld computers, mobile phone base stations, Bluetooth portable

radios and accessories, wireless LANs, digital cameras, personal

audio devices, and any other portable, battery-powered application.

AS1374

5

GND

4

EN 2

2

VDD

3

OUT 1

6

EN 1

C1

1µF

Input

2V to 5.5V

Output1

1.2V to 3.6V

1

OUT 2

C2

1µF

C3

1µF

Output2

1.2V to 3.6V