MIC5207
Micrel
MIC5207
180mA Low-Noise LDO Regulator
General Description
The MIC5207 is an efficient linear voltage regulator with ultra-
low-noise output, very low dropout voltage (typically 17mV at
light loads and 165mV at 150mA), and very low ground
current (720µA at 100mA output). The MIC5207 offers better
than 3% initial accuracy.
Designed especially for hand-held, battery-powered devices,
the MIC5207 includes a CMOS or TTL compatible enable/
shutdown control input. When shutdown, power consump-
tion drops nearly to zero.
Key MIC5207 features include a reference bypass pin to
improve its already low-noise performance, reversed-battery
protection, current limiting, and overtemperature shutdown.
The MIC5207 is available in fixed and adjustable output
voltage versions in a small SOT-23-5 package. Contact
Micrel for details.
Features
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Ultra-low-noise output
High output voltage accuracy
Guaranteed 180mA output
Low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Reverse-battery protection
“Zero” off-mode current
Logic-controlled electronic enable
Cellular telephones
Laptop, notebook, and palmtop computers
Battery-powered equipment
PCMCIA V
CC
and V
PP
regulation/switching
Consumer/personal electronics
SMPS post-regulator/dc-to-dc modules
High-efficiency linear power supplies
Applications
For low-dropout regulators that are stable with ceramic
output capacitors, see the
µ
Cap MIC5245/6/7 family.
Ordering Information
Part Number*
MIC5207BM5
MIC5207-1.8BM5
MIC5207-2.5BM5
MIC5207-3.0BM5
MIC5207-3.3BM5
MIC5207-3.6BM5
MIC5207-3.8BM5
MIC5207-4.0BM5
MIC5207-5.0BM5
MIC5207-3.3BZ
Marking
LEAA
LE18
LE25
LE30
LE33
LE36
LE38
LE40
LE50
—
Voltage
Adj
1.8
2.5
3.0
3.3
3.6
3.8
4.0
5.0
3.3
Junction Temp. Range
–40°C to +125°C
0°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
–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
SOT-23-5
TO-92
* Other voltages available. Contact Micrel Marketing for information.
Typical Application
V
IN
MIC5207-x.xBM5
1
2
Enable
Shutdown
3
4
5
V
OUT
C
OUT
= 2.2µF
tantalum
Enable
EN (pin 3) may be
connected directly
to IN (pin 1).
C
BYP
(OPTIONAL)
Low-Noise Operation:
C
BYP
= 470pF, C
OUT
≥
2.2µF
Battery-Powered Regulator Application
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
January 2000
1
MIC5207
MICREL [ MICREL SEMICONDUCTOR ]
