AS1323

1.6µA Quiescent Current, Single Cell, DC-DC Step-Up Converter

Dat a Sh eet

www.austriamicrosystems.com

Revision 1.02

1 - 13

1 General Description

The AS1323 high-efficiency step-up DC-DC converter

was designed specifically for single-cell, battery-pow-

ered devices where lowest quiescent current and high

efficiency are essential.

The compact device is available in three fixed-voltage

variations and is perfect for a wide variety of applications

where extremely-low quiescent currents and very-small

form factors are critical.

The devices are available as the standard products

shown in Table 1. See also Ordering Information on

page 12.

Integrated boot circuitry ensures start-up even with very-

high load currents.

The true output disconnect feature completely discon-

nects the output from the battery during shutdown.

The device is available in a TSOT23-5 pin package.

Figure 1. Typical Operating Circuit

2 Key Features

!

1.6µA Quiescent Current

!

Input Voltage Range: 0.75 to 2V

!

Up to 100mA Output Current

!

Fixed Output Voltages: 2.7, 3.0 and 3.3V

!

Shutdown Current: 0.1µA

!

Output Voltage Accuracy: ±3%

!

Efficiency: Up to 85%

!

No External Diode or FETs Needed

!

Output Disconnect in Shutdown

!

Guaranteed 0.95V Start-Up Voltage

!

TSOT23-5 Package

3 Applications

The devices are ideal for single-cell portable devices

including mobile phones, MP3 players, PDAs, remote

controls, personal medical devices, wireless transmitters

and receivers, and any other battery-operated, portable

device.

Table 1. Standard Products

Model

Fixed Output Voltage

Package

AS1323-27

2.7V

TSOT23-5

AS1323-30

3.0V

TSOT23-5

AS1323-33

3.3V

TSOT23-5

AS1323

3

SHDNN

1

4

5

LX

10µF

2

10µF

10µH

3

SHDNN

2

1

5LX

AS1323