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AS9123

Micro-Power consumption
24V, 300mA, Low Low-Dropout
Voltage Linear Regulator

General Description
The AS9123 is a CMOS low dropout, low noise,
low power consumption, low quiescent current
positive linear regulator with wide input voltage
range. The AS9123 can deliver a guaranteed 300mA
load current with a low dropout voltage. Quiescent
current of only 1.5uA makes these devices ideal for
powering the battery-powered, always-on systems
that require very little idle-state power dissipation to a
longer service life. There is an option of shutdown
function by selecting the parts with the EN pin and
pulling it low. The off state of AS9123 that consumes
less than 0.1uA during shutdown mode.
The AS9123 is designed and optimized to work
with low cost ceramic capacitors 1.0uF, which
consumes less than 0.1μA during shutdown mode.
Besides, its current limit protection and on-chip
thermal shutdown function provide protection against
any combination of over-load or ambient temperature
which could cause junction temperature exceeding
maximum rating.
The space-saving tiny DFN1014-4L, SOT23-3L,
SOT23-5L, SOT223 and SOT89-3L packages are
attractive for hand-held applications. The device is
specified over an ambient temperature range of
-40˚C to 125˚C.

Features
 Output Current Up to 300mA
 Wide Voltage VIN Range: 2.0V to 24V
 Very Low Quiescent Current at 1.5uA
 Low Dropout voltage of 350mV at 100mA/VIN=5V
 Output Voltage Accuracy at ±2.0%
 Support Fixed Output Voltage: 1.8V, 3.3V, 3.6V, 4.2V, 5V
 Support Adjustable Output Voltage
 PSRR 70dB at 1KHz
 Needs Only 1.0uF Capacitor for Stability
 Current Limit Protection
 Without EMI and Switch Noise
 Stable with Ceramic Capacitor or Tantalum
Capacitor
 Over Temperature Protection
 RoHS and Green Compliant
 DFN1014-4L, SOT23-3L, SOT89-3L, SOT223 and
SOT23-5L Packages
 -40℃ to +125 ℃ Temperature Range

Applications
 Portable, Battery Powered Equipment
 Low Power Microcontrollers
 Laptop, Palmtops & PDAs
 Audio/Video Equipment
 Car Navigation Systems
 Industrial Control
 Weighting Scales
 Meters/Home Automation

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