MIC5232
10mA Ultra-Low Quiescent Current
µCap LDO
General Description
The MIC5232 is an ultra-low quiescent current, low-
dropout linear regulator that is capable of operating
from a single-cell lithium ion battery. Consuming only
Features
• Input voltage range: 2.7V to 7.0V
• Ultra-low Iq: Only 1.8 A operating current
µ
• Stable with 0.47µF ceramic output capacitor
• Low dropout voltage of 100mV @ 10mA
• Reverse Battery Protection
1.8µA of quiescent current while operating, the
MIC5232 is ideal for stand-by applications like
powering real-time clocks or memory in battery
operated electronics.
• High output accuracy:
– +2.0% initial accuracy
– +3.0% over temperature
The MIC5232 is capable of providing 10mA of output
current and has low output noise, providing a small,
efficient solution ideal for any keep-alive application.
Including reverse current protection, keeping reverse
leakage (VOUT > VIN) down to 20nA.
• Logic-Level Enable Input
• Miniature 6-pin 2mm x 2mm MLF® package
• Lead-Free Thin SOT-23-5 Package
• Tight Load and Line Regulation
The MIC5232 is a µCap design, operating with very
small ceramic output capacitors for stability, reducing
required board space and component cost.
Applications
• Real-Time Clock Power Supply
• Stand-by Power Supply
• SRAM Memory Back-up Supply
• Cellular Telephones and Notebook Computers
The MIC5232 is available in fixed output voltages in
the miniature 6-pin 2mm x 2mm MLF® package and
thin SOT-23-5 package with an operating junction
temperature range of -40°C to 125°C.
Typical Application
Ground Pin Current
vs. Input Voltage
MIC5232-1.2YD5
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
VIN
VOUT
1.2V
VOUT
VIN
EN
3.6V
0.47µF
ceramic
1µF
GND
V
OUT
C
= 1.2V
0.6
0.3
0
OUT
I
= 100µA
= 0.47µF
OUT
2.5 3 3.5 4 4.5 5 5.5 6 6.5
INPUT VOLTAGE (V)
7
1.5 Real-Time Clock Back-up Supply
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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
1
M9999-112006-B
November 2006