Datasheet
AS13986
D u a l L o w - N o i s e , L o w - D r o p o u t Vo l ta g e R e g u l a t o r
1 General Description
The AS13986 dual low-dropout regulator provides up to
150mA at each output using a 2.5 to 5.5V input voltage.
The ultra-low drop-out voltage, low quiescent current,
and low noise make the AS13986 perfect for low-power,
battery-operated applications.
Regulator ground current increases only slightly in drop-
out, extending the battery life in low-power applications.
The device features excellent power supply rejection
(55dB @ 1kHz and 50dB at 10kHz). The high power
supply rejection is maintained down to low input voltage
levels used in battery operated devices.
Integrated shutdown logic control function is available
for each output. In cases where the device is used as a
local regulator it is possible to switch some of the cir-
cuitry into standby mode, thus decreasing total power
consumption.
The AS13986 was specifically designed to work with
low-ESR ceramic capacitors.
The AS13986 is available in a 8-pin WLP package.
2 Key Features
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Input Voltage: 2.5 to 5.5V
Dual Output Voltages: 1.2 to 5.0V (in 50mV Steps)
Ultra-Low Dropout Voltage: 45mV @ 150mA Load,
0.3mV @ 1mA Load
Very Low Quiescent Current: 135µA @ No Load,
255µA @ 150mA Load, 2µA In Off Mode
Guaranteed Output Current up to 150mA
Fast Turn-On Time: 160µs (C
OUT
= 1µF,
C
BYPASS
= 10nF, I
OUT
= 1mA)
Logic-Controlled Shutdown
Up to 1.5% Output Voltage Accuracy
Integrated Current-Limit and Thermal Overload
Protection
Output Low-Noise Voltage: 30µV
RMS
(10Hz to
100kHz)
Supply Voltage Rejection.: 55dB @ 1kHz,
50dB @ 10kHz
Stable With Low-ESR Ceramic Capacitors
Temperature Range: -40 to 125ºC
8-pin WLP Package
3 Applications
The device is ideal for powering cordless and mobile
phones, MP3 players, CD and DVD players, PDAs,
handheld computers, digital cameras and any other
hand-held battery-powered device.
Figure 1. AS13986 - Block Diagram
A2
V
IN
B3
EN1
B1
EN2
Fast
Turn On
C1
BYPASS
+
Thermal
Protection
+
–
V
REF
–
Enable
A3
V
OUT1
A1
V
OUT2
AS13986
C2, C3
GND
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