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Datasheet

AS1310

Ultra Low Quiescent Current, Hysteretic DC-DC Step-Up Converter

1 General Description

optimized for light loads (60mA), where it achieves efficiencies of up

to 92%.

AS1310 operates from a 0.7V to 3.6V supply and supports output

voltages between 1.8V and 3.3V. Besides the available AS1310

standard variants any variant with output voltages in 50mV steps are

available. See Ordering Information on page 18 for more information.

If the input voltage exceeds the output voltage the device is in a

feed-through mode and the input is directly connected to the output

voltage.

In light load operation, the device enters a sleep mode when most of

the internal operating blocks are turned off in order to save power.

This mode is active approximately 50µs after a current pulse

provided that the output is in regulation.

In order to save power the AS1310 features a shutdown mode,

where it draws less than 100nA. During shutdown mode the battery

is disconnected from the output.

The AS1310 also offers adjustable low battery detection. If the

battery voltage decreases below the threshold defined by two

external resistors on pin LBI, the LBO output is pulled to logic low.

The AS1310 is available in a TDFN (2x2) 8-pin package.

Figure 1. AS1310 Typical Application Diagram

2 Key Features



Input voltage range: 0.7V to 3.6V



Fixed output voltage range: 1.8V to 3.3V





Quiescent current: 1µA (typ.)



Shutdown current: < 100nA



Up to 92% efficiency



Output disconnect in shutdown





Adjustable low battery detection



No external diode or transistor required



Over temperature protection



TDFN (2x2) 8-pin package

3 Applications

The AS1310 is an ideal solution for single and dual cell powered

devices as blood glucose meters, remote controls, hearing aids,

wireless mouse or any light-load application.

0.7V to 3.6V

AS1310

22µF

On

Off

22µF

GND

2

1.8V to 3.3V

7

EN

8

VIN

4

VOUT

6

LBO

1

LBI

Low Battery Detect

L1

6.8µH

LX

3

100nF

5

REF