AS1323

1.6µA Quiescent Current, Single Cell, DC-DC

Step-up Converter

www.austriamicrosystems.com/DC-DC_Step-Up/AS1323

Revision 1.07

1 - 14

Datasheet

1 General Description

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

specifically for single-cell, battery-powered 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 13.

Integrated boot circuitry ensures start-up even with very-high load

currents.

The true output disconnect feature completely disconnects the

output from the battery during shutdown.

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

Figure 1. AS1323 - 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

VBATT

4

VOUT

5

LX

10

µF

2

VSS

10

µF

10µH

4 VOUT

3

SHDNN

2

VSS

1

VBATT

5LX

AS1323