MIC5233 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – High Input Voltage, Low IQ uCap LDO Regulator

MIC5233
Micrel
MIC5233
High Input Voltage, Low IQ µCap LDO Regulator
General Description
The MIC5233 is a 100mA 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 MIC5233 ideal for multi-cell Li-Ion battery
systems.
A µCap LDO design, the MIC5233 is stable with either
ceramic or tantalum output capacitor. It only requires a 2.2µF
capacitor for stability.
Features of the MIC5233 include enable input, thermal shut-
down, current limit, reverse battery protection, and
reverse leakage protection.
Available in fixed and adjustable output voltage versions, the
MIC5233 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 36V
• Ultra low ground current: 18µA
• Low dropout voltage of 270mV at 100mA
• High output accuracy of ±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
• Keep-alive supply in notebook and portable computers
• USB power supply
• Logic supply for high-voltage batteries
• Automotive electronics
• Battery powered systems
• 3-4 cell Li-Ion battery input range
Ordering Information
Part Number
MIC5233-1.8BM5
MIC5233-2.5BM5
MIC5233-3.0BM5
MIC5233-3.3BM5
MIC5233-5.0BM5
MIC5233BM5
Marking
L318
L325
L330
L333
L350
L3AA
Voltage
1.8V
2.5V
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
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Typical Application
V_IN
MIC5233BM5
1
5
C_IN=1.0µF
2
3
OFF ON
EN
R₁
4
R₂
V_OUT
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}
104 _{8 12 16 20 24 28 32 36 40}
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 [phone] • fax + 1 [phone] • http://www.micrel.com
August 2003
1
MIC5233