AS13985 Datasheet, PDF (1/2 Pages) ams AG – Micropower 150mA Low-Noise LDO

austriamicrosystems
AS13985
Micropower 150mA Low-Noise LDO
Product Brief
1 General Description
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.
Stability is guaranteed with a ceramic output capacitor of
from 1 to 22µF. The low equivalent series resistance (5Ω) of
these capacitors ensures low output impedance at high fre-
quencies.
Automatic sleep mode requires less than 1µA quiescent
current when pin EN is pulled low.
Regulation performance is excellent even under low drop-
out conditions, when the power transistor has to operate in
linear mode.
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.
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.
Figure 1. Block Diagram
2 Key Features
! Ultra-Low Dropout Voltage: (typically
45mV @ 150mA, 0.3mV @ 1mA)
! Supply Range: 2.5 to 5.5V
! Output Voltage Range: 1.2 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)
! Output Voltage Accuracy: 1%
! Minimal External Components Required
! High Peak-Current Capability
! Low Shutdown Current: ≤1µA
! Operating Temperature Junction Range: -40 to +125°C
! Smallest Available Packages:
- 5-bump WLP
- 5-pin SOT23
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.
1
VIN
3
EN
4
BYPASS
2
GND
VREF
–
+
Over-Current/
Over-Temperature
Protection
AS13985
5
VOUT
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Revision 1.03
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