Micrel, Inc.
MIC5219
MIC5219
500mA-Peak Output LDO Regulator
General Description
Features
The MIC5219 is an efficient linear voltage regulator with high
peak output current capability, very-low-dropout voltage, and
better than 1% output voltage accuracy. Dropout is typically
10mV at light loads and less than 500mV at full load.
• 500mA output current capability
SOT-23-5 package - 500mA peak
®
2mm×2mm MLF package - 500mA continuous
®
2mm×2mm Thin MLF package - 500mA
continuous
TheMIC5219isdesignedtoprovideapeakoutputcurrentfor
start-upconditionswherehigherinrushcurrentisdemanded.
It features a 500mA peak output rating. Continuous output
current is limited only by package and layout.
MSOP-8 package - 500mA continuous
• Low 500mV maximum dropout voltage at full load
• Extremely tight load and line regulation
• Tiny SOT-23-5 and MM8™ power MSOP-8 package
• Ultra-low-noise output
• Low temperature coefficient
• Current and thermal limiting
• Reversed-battery protection
• CMOS/TTL-compatible enable/shutdown control
• Near-zero shutdown current
The MIC5219 can be enabled or shut down by a CMOS or
TTL compatible signal. When disabled, power consumption
drops nearly to zero. Dropout ground current is minimized to
helpprolongbatterylife.Otherkeyfeaturesincludereversed-
batteryprotection,currentlimiting,overtemperatureshutdown,
and low noise performance with an ultra-low-noise option.
The MIC5219 is available in adjustable or fixed output volt-
®
Applications
• Laptop, notebook, and palmtop computers
• Cellular telephones and battery-powered equipment
• Consumer and personal electronics
ages in the space-saving 6-pin (2mm × 2mm) MLF , 6-pin
®
®
(2mm × 2mm) Thin MLF SOT-23-5 and MM8 8-pin power
MSOP packages. For higher power requirements see the
MIC5209 or MIC5237.
• PC Card V and V regulation and switching
• SMPS post-regulator/DC-to-DC modules
• High-efficiency linear power supplies
All support documentation can be found on Micrel’s web site
at www.micrel.com.
CC
PP
Typical Applications
MIC5219-5.0BMM
1
2
3
4
8
7
6
5
ENABLE
SHUTDOWN
MIC5219-3.3BM5
VIN 6V
VOUT5V
1
2
3
5
VIN 4V
VOUT3.3V
2.2µF
tantalum
4
ENABLE
SHUTDOWN
2.2µF
tantalum
470pF
470pF
5V Ultra-Low-Noise Regulator
3.3V Ultra-Low-Noise Regulator
VOUT
VOUT
COUT
VIN
EN
VIN
EN
MIC5219YMT
MIC5219-x.xYML
+
ENABLE
SHUTDOWN
ENABLE
SHUTDOWN
R1
R2
6
1
6
5
4
1
2
3
CBYP
(optional)
2.2µF
5
4
2
3
470pF
Ultra-Low-Noise Regulator (Adjustable)
Ultra-Low-Noise Regulator (Fixed)
MM8 is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc..
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2009
1
M0371-061809