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
• Excellent line and load regulation specifications
• Reverse battery protection
• Reverse leakage protection
• Zero shutdown current
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.
• Thermal shutdown and current limit protection
• IttyBitty® SOT23-5 Package
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.
Applications
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
• 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
Ground Pin Current
vs. Input Voltage
MIC5225YM5
40
38
36
34
32
30
28
26
24
22
20
VIN
VOUT = 1.8V
1
5
2
I
= 1mA
R1
R2
OUT
CIN = 1.0µF
OFF
COUT = 2.2µF
ceramic
3
4
I
= 100µA
OUT
ON
EN
IGND = 18µA
I
= 10µA
OUT
8
4
6
10 12 14 16
Ultra-Low Current Adjustable Regulator Application
INPUT VOLTAGE (V)
IttyBitty is a registered trademark of Micrel, 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
M9999-072908-A
July 2008