MIC5232 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – 10mA Ultra-Low Quiescent Current uCap LDO

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
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.
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 (V_OUT > V_IN) down to 20nA.
The MIC5232 is a µCap design, operating with very
small ceramic output capacitors for stability, reducing
required board space and component cost.
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.
Features
• Input voltage range: 2.7V to 7.0V
• Ultra-low Iq: Only 1.8µA operating current
• Stable with 0.47µF ceramic output capacitor
• Low dropout voltage of 100mV @ 10mA
• Reverse Battery Protection
• High output accuracy:
– +2.0% initial accuracy
– +3.0% over temperature
• Logic-Level Enable Input
• Miniature 6-pin 2mm x 2mm MLF^® package
• Lead-Free Thin SOT-23-5 Package
• Tight Load and Line Regulation
Applications
• Real-Time Clock Power Supply
• Stand-by Power Supply
• SRAM Memory Back-up Supply
• Cellular Telephones and Notebook Computers
Typical Application
V_IN
3.6V
1µF
MIC5232-1.2YD5
VIN VOUT
EN
GND
V_OUT
1.2V
0.47µF
ceramic
1.5 Real-Time Clock Back-up Supply
Ground Pin Current
vs. Input Voltage
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
V_OUT = 1.2V
0.3
I_OUT = 100µA
C_OUT = 0.47µF
20.5 3 3.5 4 4.5 5 5.5 6 6.5 7
INPUT VOLTAGE (V)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
November 2006
1
M9999-112006-B