MIC5321 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – Dual, High Performance 150mA UCap ULDO

MIC5321
Dual, High Performance 150mA µCap ULDO™
General Description
The MIC5321 is a tiny Dual Ultra Low-Dropout
(ULDO™) linear regulator ideally suited for those
applications that require high PSRR because it
provides a bypass pin for those noise sensitive
portable electronics. The MIC5321 integrates two
high-performance; 150mA ULDOs into a very compact
1.6mm x 1.6mm leadless Thin MLF^® package that
provides exceptional thermal package characteristics.
The MIC5321 is a µCap design which enables
operation with very small ceramic output capacitors
for stability, thereby reducing required board space
and component cost. The combination of extremely
low-drop-out voltage, very high power supply
rejection, very low output noise and exceptional
thermal package characteristics makes it ideal for
powering RF application, cellular phone camera
modules, imaging sensors for digital still cameras,
PDAs, MP3 players and WebCam applications.
The MIC5321 ULDO™ is available in fixed-output
voltages in the tiny 6-pin 1.6mm x 1.6mm leadless
Thin MLF^® package which is only 2.56mm² in area,
less than 30% the area of the SOT-23, TSOP and
MLF^® 3x3 packages. It’s also available in the thin
SOT-23-6 lead package. Additional voltage options
are available. For more information, contact Micrel
marketing department.
Data sheets and support documentation can be found
on Micrel’s web site at www.micrel.com.
Features
• 2.3V to 5.5V input voltage range
• Ultra-low dropout voltage ULDO™ 35mV @
150mA
• Tiny 6-pin 1.6mm x 1.6mm Thin MLF^® leadless
package
• Low cost TSOT-23-6 package
• Bypass pin for improved noise performance
High PSRR – >75dB on each LDO
• Ultra low noise output - > 30µVrms
• Dual 150mA outputs
• µCap stable with 1µF ceramic capacitor
• Low quiescent current – 150µA
• Fast turn-on time – 45µs
• Thermal shutdown protection
• Current Limit protection
Applications
• Mobile phones
• PDAs
• GPS receivers
• Portable electronics
• Portable media players
• Digital still and video cameras
Typical Application
MIC5321-x.xYML
VIN VOUT 1
VOUT 2
EN
1µF
BYP
GND
0.01µF
Rx/Synth
Tx
RF
1µF 1µF Transceiver
RF Power Supply Circuit
ULDO is a trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
January 2007
M9999-012407-C