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MIC5203 Datasheet, PDF (1/7 Pages) Micrel Semiconductor – μCap™ 80mA Low-Dropout Voltage Regulator
MIC5203
Micrel
MIC5203
µCap™ 80mA Low-Dropout Voltage Regulator
General Description
Features
The MIC5203 is a µCap™ 80mA linear voltage regulator with • Tiny 4-lead and 5-lead surface-mount packages
very low dropout voltage (typically 20mV at light loads and • Wide Selection of output voltages
300mV at 80mA) and very low ground current (225µA at • Guaranteed 80mA output
20mA output), offering better than 3% initial accuracy with a • Low quiescent current
logic-compatible enable input.
• Low dropout voltage
The µCap™ regulator design is optimized to work with low-
value, low-cost ceramic capacitors. The outputs typically
require only 0.47µF of output capacitance for stability.
Designed especially for hand-held, battery-powered devices,
the MIC5203 can be controlled by a CMOS or TTL compatible
logic signal. When disabled, power consumption drops nearly
to zero. If on-off control is not required, the enable pin may be
• Tight load and line regulation
• Low temperature coefficient
• Current and thermal limiting
• Reversed input polarity protection
• Zero off-mode current
• Logic-controlled shutdown
• Stability with low-ESR ceramic capacitors
tied to the input for 3-terminal operation. The ground current
of the MIC5203 increases only slightly in dropout, further Applications
3
prolonging battery life. Key MIC5203 features include current
limiting, overtemperature shutdown, and protection against
reversed battery.
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
The MIC5203 is available in 2.8V, 3.0V, 3.3V, 3.6V, 3.8V, • Bar code scanners
4.0V, 4.5V, 4.75V, and 5.0V fixed voltages. Other voltages • SMPS post-regulator/dc-to-dc modules
are available; contact Micrel for details.
• High-efficiency linear power supplies
Typical Applications
Ordering Information
Enable
Shutdown
Enable
Shutdown
LAxx
VOUT
0.47µF
SOT-143 Version
1
5
VOUT
2
0.47µF
3
4
SOT-23-5 Version
Part Number
Marking Voltage
MIC5203-3.0BM4
LA30
3.0V
MIC5203-3.3BM4
LA33
3.3V
MIC5203-3.6BM4
LA36
3.6V
MIC5203-3.8BM4
LA38
3.8V
MIC5203-4.0BM4
LA40
4.0V
MIC5203-4.5BM4
LA45
4.5V
MIC5203-4.7BM4
LA47
4.75V
MIC5203-5.0BM4
LA50
5.0V
MIC5203-2.8BM5
LA28
2.8V
MIC5203-3.0BM5
LK30
3.0V
MIC5203-3.3BM5
LK33
3.3V
MIC5203-3.6BM5
LK36
3.6V
MIC5203-3.8BM5
LK38
3.8V
MIC5203-4.0BM5
LK40
4.0V
MIC5203-4.5BM5
LK45
4.5V
MIC5203-4.7BM5
LK47
4.75V
MIC5203-5.0BM5
LK50
5.0V
Other voltages available. Contact Micrel for details.
Junction Temp. Range
–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
–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
–40°C to +125°C
Package
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
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
December 1998
3-141
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