MIC5219_09 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – 500mA-Peak Output LDO Regulator

Micrel, Inc.
MIC5219
MIC5219
500mA-Peak Output LDO Regulator
General Description
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.
The MIC5219 is designed to provide a peak output current for
start-up conditions where higher inrush current is demanded.
It features a 500mA peak output rating. Continuous output
current is limited only by package and layout.
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
help prolong battery life. Other key features include reversed-
battery protection, current limiting, overtemperature shutdown,
and low noise performance with an ultra-low-noise option.
The MIC5219 is available in adjustable or fixed output volt-
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.
All support documentation can be found on Micrel’s web site
at www.micrel.com.
Features
• 500mA output current capability
SOT-23-5 package - 500mA peak
2mm×2mm MLF^® package - 500mA continuous
2mm×2mm Thin MLF^® package - 500mA
continuous
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
Applications
• Laptop, notebook, and palmtop computers
• Cellular telephones and battery-powered equipment
• Consumer and personal electronics
• PC Card V_CC and V_PP regulation and switching
• SMPS post-regulator/DC-to-DC modules
• High-efficiency linear power supplies
Typical Applications
ENABLE
SHUTDOWN
V_IN 6V
V_{O U T}5 V
2.2µF
tantalum
MIC5219-5.0BMM
1
8
2
7
3
6
4
5
470pF
MIC5219-3.3BM5
V_IN 4V
1
2
ENABLE
3
SHUTDOWN
5
V_OUT3.3V
2.2µF
4
tantalum
470pF
5V Ultra-Low-Noise Regulator
3.3V Ultra-Low-Noise Regulator
ENABLE
SHUTDOWN
V_IN
EN
MIC5219-x.xYML
1
6
2
5
3
4
C_BYP
(optional)
Ultra-Low-Noise Regulator (Fixed)
V_OUT
C_OUT
ENABLE
SHUTDOWN
V_IN
EN
MIC5219YMT
1
6
2
5
3
4
470pF
V_OUT
R1
+
2.2µF
R2
Ultra-Low-Noise Regulator (Adjustable)
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 [phone] • fax + 1 [phone] • http://www.micrel.com
June 2009
1
M0371-061809