MIC5211
Micrel
MIC5211
Dual µCap 80mA LDO Regulator
Preliminary Information
General Description
Features
The MIC5211 is a dual µCap 80mA linear voltage regulator
with very low dropout voltage (typically 20mV at light loads),
very low ground current (225µA at 20mA output current), and
better than 3% initial accuracy. This dual device comes in the
miniature SOT-23-6 package, featuring independent logic
control inputs.
• Stable with low-value ceramic or tantalum capacitors
• Independent logic controls
• Low quiescent current
• Low dropout voltage
• Mixed voltages available
• Tight load and line regulation
• Low temperature coefficient
• Current and thermal limiting
• Reversed input polarity protection
• Zero off-mode current
The µCap regulator design is optimized to work with low-
value, low-cost ceramic capacitors. The outputs typically
require only 0.1µF of output capacitance for stability.
Designedespeciallyforhand-held,battery-powereddevices,
ground current is minimized using Micrel’s proprietary Super
ßeta PNP™ technology to prolong battery life. When dis-
abled, power consumption drops nearly to zero.
• Dual regulator in tiny SOT-23 package
• 2.5V to 16V input range
Applications
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
• Bar code scanners
• SMPS post regulator/dc-to-dc modules
• High-efficiency linear power supplies
Key features include SOT-23-6 packaging, current limiting,
overtemperature shutdown, and protection against reversed
battery conditions.
The MIC5211 is available in dual 1.8V, 2.5V, 2.7V, 2.8V,
3.0V, 3.3V, 3.6V, and 5.0V versions. Certain mixed voltages
are also available. Contact Micrel for other voltages.
Ordering Information
Part Number
Marking Voltage
Junction Temp. Range
0°C to +125°C
Package
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
MIC5211-1.8BM6
MIC5211-2.5BM6
MIC5211-2.7BM6
MIC5211-2.8BM6
MIC5211-3.0BM6
MIC5211-3.3BM6
MIC5211-3.6BM6
MIC5211-5.0BM6
LFBB
LFCC
LFDD
LFEE
LFGG
LFLL
1.8V
2.5V
2.7V
2.8V
3.0V
3.3V
3.6V
5.0V
–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
LFQQ
LFXX
Dual-Voltage Regulators
MIC5211-1.8/2.5BM6
MIC5211-1.8/3.3BM6
MIC5211-2.5/3.3BM6
MIC5211-3.3/5.0BM6
LFBC
LFBL
LFCL
LFLX
1.8V/2.5V
1.8V/3.3V
2.5V/3.3V
3.3V/5.0V
0°C to +125°C
0°C to +125°C
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
–40°C to +125°C
–40°C to +125°C
Typical Application
Other voltages available. Contact Micrel for details.
VIN
MIC5211
1
2
3
6
5
4
Enable
Shutdown
VOUTA
0.1µF
Enable A
Enable
VOUTB
Shutdown
0.1µF
Enable B
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
November 2000
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MIC5211