MIC5233_09 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – High Input Voltage Low IQ μCap LDO Regulator

MIC5233
High Input Voltage
Low IQ µCap LDO Regulator
General Description
The MIC5233 is a 100mA highly accurate, low dropout
regulator with high input voltage and ultra-low ground
current. This combination of high voltage and low ground
current makes the MIC5233 ideal for multi-cell Li-Ion
battery systems.
A μCap LDO design, the MIC5233 is stable with either
ceramic or tantalum output capacitor. It only requires a
2.2μF capacitor for stability.
Features of the MIC5233 include enable input, thermal
shutdown, current limit, reverse battery protection, and
reverse leakage protection.
Available in fixed and adjustable output voltage versions,
the MIC5233 is offered in the IttyBitty® SOT-23-5 package
with a junction temperature range of –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• Wide input voltage range: 2.3V to 36V
• Ultra low ground current: 18μA
• Low dropout voltage of 270mV at 100mA
• High output accuracy of ±2.0% over temperature
• μCap: stable with ceramic or tantalum capacitors
• Excellent line and load regulation specifications
• Zero shutdown current
• Reverse battery protection
• Reverse leakage protection
• Thermal shutdown and current limit protection
• IttyBitty® SOT-23-5 package
•
Applications
• Keep-alive supply in notebook and portable computers
• USB power supply
• Logic supply for high-voltage batteries
• Automotive electronics
• Battery powered systems
• 3-4 cell Li-Ion battery input range
___________________________________________________________________________________________________________
Typical Application
V_IN
MIC5233BM5
1
5
C_IN=1.0µF
2
3
OFF ON
EN
R₁
4
R₂
V_OUT
C_OUT=2.2µF
ceramic
I_GND=18µA
Ultra-Low Current Adjustable Regulator Application
Ground Current vs. Input Voltage
IttyBitty is a registered trademark of Micrel, Inc
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
September 2009
M9999-092109