MIC5211 Dual µCap 80mA LDO Regulator 0 pages

May 2006 1 MIC5211
MIC5211 Micrel, Inc.
General Description
The MIC5211 is a dual ìCap 80mA linear voltage regulator
with very low dropout voltage (typically 20mV at light loads),
very low ground current (225ìA 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.
The ìCap regulator design is optimized to work with low-value,
low-cost ceramic capacitors. The outputs typically require
only 0.1ìF of output capacitance for stability.
Designed especially for hand-held, battery-powered devices,
ground current is minimized using Micrel’s proprietary Super
ßeta PNP™ technology to prolong battery life. When disabled,
power consumption drops nearly to zero.
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.
Typical Application
1 6
2
3 4
0.1ìF
0.1ìF
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Shutdown
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VOUTA
MIC5211
VIN
5
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Shutdown
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VOUTB
Features
• 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
• 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
MIC5211
Dual ìCap 80mA LDO Regulator
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com