MIC5264 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – 150mA UCap Dual LDO Regulator

MIC5264
150mA µCap Dual LDO Regulator
General Description
The MIC5264 is a dual 150mA LDO in tiny 2.5mm x
2.5mm MLF™ packaging ideal for applications where cost
is the priority. The MIC5264 is ideal for any application in
portable electronics, including both RF and Digital
applications. With low output noise and high PSRR, the
MIC5264 is ideal for noise sensitive RF applications. While
the fast transient response and active shutdown circuitry
makes it well-suited for powering digital circuitry.
The MIC5264 has a 2.7V to 5.5V input operating voltage
range, making it ideal for operation from a single cell
lithium ion battery or fixed 3.3V and 5V systems. Each
LDO is completely independent and can be powered
independently, making it easier to use in distributed power
applications.
The MIC5264 offers low dropout voltage (210mV at
150mA), low output noise (57µVrms), high PSRR and
integrates an active shutdown circuit on the output of each
regulator to discharge the output voltage when disabled.
Data sheets and supporting documentation can be found
on Micrel’s web site at: www.micrel.com
Features
• 2.7V to 5.5V supply voltage.
• Low 75µA quiescent current per LDO.
• Tiny 2.5mm x 2.5mm MLF™ package.
• Low Noise – 57µVrms.
• High PSRR – 60dB at 1kHz.
• Low dropout voltage – 210mV at 150mA.
• Stable with ceramic output capacitors.
• Independent enable pins.
• Fast transient response.
• Active shutdown on both outputs.
Applications
• Cellular Telephones
• PDAs
• GPS Receivers
Typical Application
MIC5264-xxYML
VIN 1
VIN 2
OUT 1
OUT 2
EN 1
EN 2
1µF
1µF
BYP1 _GND BYP2
0.01µF
0.01µF
Rx/Synth
Tx
1µF
RF
Transceiver
RF Power Supply
Power Supply
Rejection Ratio
-80
-70
-60
-50
-40
-30
-20 VIN = VOUT + 1V
VOUT = 3.0V
-10 BYP = 0.1µF
COUT = 1µF
00.01 _{0.1 1 10 100}
FREQUENCY (kHz)
1000
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
April 2005
M9999-041505
[phone]