MIC5235(2003) 查看數據表（PDF） - Micrel
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MIC5235 Datasheet PDF : 9 Pages
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MIC5235
Micrel
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
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
Ordering Information
Part Number
MIC5235-1.5BM5
MIC5235-1.8BM5
MIC5235-2.5BM5
MIC5235-2.7BM5
MIC5235-3.0BM5
MIC5235-3.3BM5
MIC5235-5.0BM5
MIC5235BM5
Marking
L215
L218
L225
L227
L230
L233
L250
L2AA
Voltage
1.5V
1.8V
2.5V
2.7V
3.0V
3.3V
5.0V
ADJ.
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
Typical Application
VIN
MIC5235BM5
1
5
CIN=1.0µF
2
3
OFF ON EN
R1
4
R2
VOUT=1.8V
COUT=2.2µF
ceramic
IGND=18µA
Ultra-Low Current Adjustable Regulator Application
40
35
30 IOUT = 1mA
25
IOUT = 100µA
20
15 IOUT = 10µA
104
9
14
19
24
INPUT VOLTAGE (V)
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
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