Datasheet
AS13985
Micropower 150mA Low-Noise LDO
1 General Description
2 Key Features
ꢀ
Ultra-Low Dropout Voltage (typically
45mV @ 150mA, 0.3mV @ 1mA)
The AS13985 is a high-performance low-dropout 150mA
voltage regulator designed for use with very-low ESR out-
put capacitors. The device can deliver superior perfor-
mance in all specifications critical to battery-powered
designs, and is perfectly suited for mobile phones, PDAs,
MP3 players, and other battery powered devices.
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Supply Range: 2.5V to 5.5V
Output Voltage Range: 1.2V to 5.0V (in 25mV Steps)
Output Current: 150mA (Guaranteed)
Stable with Low-ESR Output Capacitor
Integrated Over-Temperature/Over-Current Protection
Low GND Pin Current (only 95µA)
Stability is guaranteed with a ceramic output capacitor from
1 to 22µF. The low equivalent series resistance of these
capacitors ensures low output impedance at high frequen-
cies.
Automatic sleep mode requires less than 1µA quiescent
current when pin EN is pulled low.
Output Voltage Accuracy: 1%
Regulation performance is excellent even under low drop-
out conditions, when the power transistor has to operate in
linear mode.
Minimal External Components Required
High Peak-Current Capability
A 10nF bypass capacitor can be added to reduce output
noise to 30µV. The low-noise performance allows direct
connection of noise sensitive circuits without additional fil-
tering networks.
Low Shutdown Current: ≤1µA
Operating Temperature Junction Range: -40 to +125°C
Smallest Available Packages:
- 5-bump WLP
- 5-pin SOT23
Multiple output voltage options are available as standard
products. Contact austriamicrosystems AG for details.
The AS13985 is available in a 5-bump WLP package and a
5-pin SOT23 package.
3 Applications
The AS13985 is ideal for powering cordless and mobile
phones, MP3 players, CD and DVD players, PDAs, hand-
held computers, digital cameras, and any other hand-held
battery-powered device.
Figure 1. AS13985 - Block Diagram
VIN
EN
–
+
VREF
VOUT
Over-Current/
Over-Temperature
Protection
BYPASS
GND
AS13985
www.austriamicrosystems.com
Revision 1.13
1 - 12
AMSCO [ AMS(艾迈斯) ]
