MIC5235_09 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – Ultra-Low Quiescent Current, 150mA μCap LDO Regulator

MIC5235
Ultra-Low Quiescent Current, 150mA
µCap LDO Regulator
General Description
The MIC5235 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 MIC5235 ideal for USB and portable
electronics applications, using 1-cell, 2-cell or 3-cell Li-Ion
battery inputs.
A µCap LDO design, the MIC5235 is stable with either
ceramic or tantalum output capacitor. It only requires a
2.2µF capacitor for stability.
Features of the MIC5235 includes enable input, thermal
shutdown, current limit, reverse battery protection, and
reverse leakage protection.
Available in fixed and adjustable output voltage versions,
the MIC5235 is offered in the IttyBitty^® SOT-23-5 package
with a junction temperature range of –40°C to +125°C.
Features
• Wide input voltage range: 2.3V to 24V
• Ultra low ground current: 18µA
• Low dropout voltage: 310mV at 150mA
• High output accuracy: ±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
• Adjustable output from 1.24V-20V
Applications
• USB power supply
• Cellular phones
• Keep-alive supply in notebook and portable computers
• Logic supply for high-voltage batteries
• Automotive electronics
• Battery powered systems
Typical Application
V_IN
C_IN=1.0µF
MIC5235BM5
1
5
2
3
EN
R₁
4
R₂
V_OUT=1.8V
C_OUT=2.2µF
ceramic
I_GND=18µA
Ultra-Low Current Adjustable Regulator Application
40
35
30 _{IOUT = 1mA}
25
I_OUT = 100µA
20
15 _{IOUT = 10µA}
1049
14
19
24
INPUT VOLTAGE (V)
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
May 2008
M9999-051508