AS1330

4MHz, Low Vo ltage, DC-DC Step-Up Converter

www.austriamicrosystems.com/DC-DC_Step-Up/AS1330

Revision 1.04

1 - 16

Data sheet

1 General Description

The AS1330 is a synchronous, low voltage, high

efficiency DC-DC boost converter running at a constant

frequency of 4MHz. This very high oscillator frequency

allows the usage of a very a small and low profile

inductor with only 470nH. This results in a board space

requirement of only 43mm² for the complete solutions

including all external components.

AS1330 generates an output voltage between 1.8 and

3.3V from input voltages down to 0.6V. Therefore it is

ideal for application powered by a single cell battery.

AS1330 provides an output current of 150mA @ 3.3V

from a single cell.

To support high efficiency across the entire load range

the AS1330 is equipped with a synchronous rectifier and

features a power save mode for light loads.

To avoid harmful deep discharge of the battery during

shutdown the AS1330 is equipped with an output

disconnect function.

AS1330 can either monitor the battery voltage (Sense

pin) or report the status of the output voltage (POK).

The AS1330 is available in a TDFN (2x2mm) 8-pin pack-

age.

2 Key Features

!

Input Voltage Range: 0.6V to 3.0V

!

Adjustable Output Voltage Range: 1.8V to 3.3V

!

Fixed Output Voltage: 1.8V, 3.0V

!

0.85V Low Start-Up Voltage

!

4MHz Fixed-Frequency

!

91% Efficiency

!

Delivers 150mA @ 3.3V (from Single AA Cell)

!

Automatic Powersave Operation for light Loads

!

Output Disconnect during Shutdown

!

Anti-Ringing Control minimizes EMI

!

Power Okay and Sense pin

!

TDFN (2x2mm) 8-pin Package

3 Applications

The AS1330 is ideal for space critical applications where

ultra-small size is critical as in medical diagnostic equip-

ment, hand-held instruments, digital cameras, MP3 play-

ers, GPS receivers, and PC or Memory cards.

AA Battery

AS1330-1.8

C2

On

Off

L1

C1

GND

SW

1.8V

EN

FB

VIN

VOUT

Figure 1. AS1330 - Typical Application Diagram

SENSE

POK