AS1310
Ultra Low Quiescent Current, Hysteretic DC-DC Step-Up Converter
www.austriamicrosystems.com/DC-DC_Step-Up/AS1310 Revision 1.04 1 - 15
Datasheet
1 General Description
The AS1310 is an ultra low IQ hysteretic step-up DC-DC converter
optimized for light lo ads (60mA), where it achieves e fficiencies 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 14 for more information.
If the input voltage exceeds the output voltage the device is in a
feed-through mode and the input is direc tly connected to the outpu t
voltage.
In order to save power the AS1310 features a shutdown mode,
where it draws less th an 100nA. During shutdown mode the batte ry
is disconnected from the output.
The AS1310 also offers adjustable low battery detection. If the bat-
tery 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.
2 Key Features
Input Voltage Range: 0.7V to 3.6V
Fixed Output Voltage Range: 1.8V to 3.3V
Output Current: 60mA @ VIN=0.9V, VOUT=1.8V
Quiescent Current: 1µA (typ.)
Shutdown Current: < 100nA
Up to 92% efficiency
Output Disconnect in Shutdown
Feedthrough Mode when VIN > VOUT
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.
Figure 1. AS1310 - Typical Application Diagram
VIN
0.7V to 3.6V
AS1310
C2
22µF
On
Off
C
1
22µF
GND
2
V
OUT
1.8V to 3.3V
7
EN
8
VIN
4
VOUT
6
LBO
1
LBI
R3
Low Battery Detect
R
1
R
2
L1
6.8µH
LX
3
CREF
100nF
5
REF
