MIC5235
Micrel
MIC5235
Ultra-Low Quiescent Current, 150mA µCap LDO Regulator
General Description
Features
The MIC5235 is a 150mA highly accurate, low dropout
regulatorwithhighinputvoltageandultra-lowgroundcurrent.
This combination of high voltage and low ground current
makes the MIC5235 ideal for USB and portable electronics
applications, using1-cell, 2-cellor3-cellLi-Ionbatteryinputs.
• 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
A µCap LDO design, the MIC5235 is stable with either
ceramicortantalumoutputcapacitor. Itonlyrequiresa2.2µF
capacitor for stability.
Features of the MIC5235 includes enable input, thermal
shutdown, current limit, reverse battery protection, and
reverse leakage protection.
Applications
• USB power supply
• Cellular phones
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.
• Keep-alive supply in notebook and portable computers
• Logic supply for high-voltage batteries
• Automotive electronics
• Battery powered systems
Ordering Information
Part Number
Marking Voltage
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
MIC5235-1.5BM5
MIC5235-1.8BM5
MIC5235-2.5BM5
MIC5235-2.7BM5
MIC5235-3.0BM5
MIC5235-3.3BM5
MIC5235-5.0BM5
MIC5235BM5
L215
L218
L225
L227
L230
L233
L250
L2AA
1.5V
1.8V
2.5V
2.7V
3.0V
3.3V
5.0V
ADJ.
Typical Application
40
35
30
25
20
15
10
MIC5235BM5
VIN
CIN=1.0µF
VOUT=1.8V
1
5
IOUT = 1mA
2
3
R1
R2
COUT=2.2µF
ceramic
IOUT = 100µA
4
OFF ON
IGND=18µA
EN
IOUT = 10µA
4
9
14
19
24
INPUT VOLTAGE (V)
Ultra-Low Current Adjustable Regulator Application
Ground Current vs. Input Voltage
IttyBitty is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
August 2003
1
MIC5235