MIC5303 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – Single 300mA CMOS Ultra Small ULDO

MIC5303
Single 300mA CMOS
Ultra Small ULDO™
General Description
The MIC5303 is an ultra small, Ultra Low Dropout CMOS
regulator, ULDO™ that is ideal for today’s most demand-
ing portable applications including cellular phone RF
power, camera modules, imaging sensors for digital still
and video cameras, PDAs, portable media players (PMP)
and PC cameras where board space is limited. It offers
extremely low dropout voltage, very low output noise and
can operate from a 2.3V to 5.5V input while delivering up
to 300mA.
It offers 2% initial accuracy, low ground current (typically
85µA total), thermal and current limit protection. The
MIC5303 can also be put into a zero-off-mode current
state, drawing no current when disabled.
The MIC5303 is available in the ultra small 4-pin 1.2mm x
1.6mm Thin MLF^® package, occupying only 1.92mm² of
PCB area, a 50% reduction in board area compared to
SC-70 and 2mm x 2mm MLF^® packages. It’s operating
junction temperature range is –40°C to +125°C and is
available in fixed output voltages in lead-free (RoHS
compliant) Thin MLF^® package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Ultra Small 1.2mm x 1.6mm Thin MLF^® package
• Low Dropout Voltage: 100mV at 300mA
• Output noise 120µVrms
• Input voltage range: 2.3V to 5.5V
• 300mA guaranteed output current
• Stable with ceramic output capacitors
• Low quiescent current 85µA total
• 35µs turn-on time
• High output accuracy
– ±2% initial accuracy
– ±3% over temperature
• Thermal shutdown and current limit protection
Applications
• Mobile Phones
• PDAs
• GPS Receivers
• Portable Media Players
• Portable Electronics
• Digital Still & Video Cameras
Typical Application
1µF
MIC5303-x.xYMT
VIN VOUT
EN
GND
1µF
RF LDO Application
Dropout Voltage
vs. Output Current
150
125
100
75
50
25
V_OUT = 2.8V
C_OUT = 1µF
00 _{50 100 150 200 250 300}
OUTPUT CURRENT (mA)
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
October 2006
1
M9999-102506-B