AS1323
1.6µA Quiescent Current, Single Cell, DC-DC Step-Up Converter
D a ta S he e t
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
See also
Table 1. Standard Products
Model
AS1323-27
AS1323-30
AS1323-33
Fixed Output Voltage
2.7V
3.0V
3.3V
Package
TSOT23-5
TSOT23-5
TSOT23-5
2 Key Features
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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
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.
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.
Figure 1. Typical Operating Circuit
10µH
1
V
BATT
10µF
5
LX
V
BATT
1
5
LX
AS1323
3
SHDNN
2
V
SS
V
SS
2
AS1323
4
V
OUT
10µF
SHDNN
3
4
V
OUT
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