MIC5225 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – Ultra-Low Quiescent Current 150mA μCap Low Dropout Regulator

MIC5225
Ultra-Low Quiescent Current
150mA µCap Low Dropout Regulator
General Description
Features
The MIC5225 is a 150mA 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 MIC5225 ideal for a wide variety of
applications including USB and portable electronics
applications, using 1-cell, 2-cell or 3-cell Li-Ion battery
inputs.
• Wide input voltage range: 2.3V to 16V
• High output accuracy of ±2.0% over temperature
• Guaranteed 150mA output
• Very low ground current: 29µA
• Low dropout voltage of 310mV at 150mA
• µCap: Stable with ceramic or tantalum capacitors
A µCap LDO design, the MIC5225 is stable with either a
ceramic or tantalum output capacitor. It only requires a
2.2µF capacitor for stability.
Features of the MIC5225 includes enable input, thermal
shutdown, current limit, reverse battery protection, and
reverse leakage protection.
Available in fixed and adjustable output voltage versions,
the MIC5225 is offered in the IttyBitty^® SOT23-5 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.
• Excellent line and load regulation specifications
• Reverse battery protection
• Reverse leakage protection
• Zero shutdown current
• Thermal shutdown and current limit protection
• IttyBitty^® SOT23-5 Package
Applications
• Cellular phones
• Keep alive supply in notebook and portable computers
• Battery-powered equipment
• Consumer/personal electronics
• High-efficiency linear power supplies
• Automotive electronics
_______________________________________________________________________________________________________
Typical Application
V_IN
C_IN = 1.0µF
OFF _{ON EN}
MIC5225YM5
1
5
2
R₁
3
4
R₂
V_OUT = 1.8V
C_OUT = 2.2µF
ceramic
I_GND = 18µA
Ultra-Low Current Adjustable Regulator Application
Ground Pin Current
vs. Input Voltage
40
38
36
34 ^{IOUT = 1mA}
32
30
I_OUT = 100µA
28
26
I_OUT = 10µA
24
22
204 _{6 8 10 12 14 16}
INPUT VOLTAGE (V)
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
July 2008
M9999-072908-A