MIC5203
Cap 80mA Low-Dropout Regulator
General Description Features
The MIC5203 is a Cap 80mA linear voltage regulator with
Tiny 4- 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 (225A at
Guaranteed 80mA output
20mA output), offering better than 3% initial accuracy with
Low quiescent current
a logic-compatible enable input.
Low dropout voltage
TheCap regulator design is optimized to work with low-
value, low-cost ceramic capacitors. The outputs typically Low temperature coefficient
require only 0.47F of output capacitance for stability.
Current and thermal limiting
Designed especially for hand-held, battery-powered
Reversed input polarity protection
devices, the MIC5203 can be controlled by a CMOS or
Zero off-mode current
TTL compatible logic signal. When disabled, power
Logic-controlled shutdown
consumption drops nearly to zero. If on-off control is not
Stability with low-ESR ceramic capacitors
required, the enable pin may be tied to the input for 3-
terminal operation. The ground current of the MIC5203
increases only slightly in dropout, further prolonging
Applications
battery life. Key MIC5203 features include current limiting,
overtemperature shutdown, and protection against
Cellular telephones
reversed battery.
Laptop, notebook, and palmtop computers
The MIC5203 is available in 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,
Battery-powered equipment
4.0V, 4.5V, 4.75V, and 5.0V fixed voltages. Other voltages
Barcode scanners
are available.
SMPS post-regulator/DC-to-DC modules
Data sheets and support documentation can be found on
High-efficiency linear power supplies
Micrels web site at www.micrel.com.
_________________________________________________________________________________________________________________________
Typical Application
Enable
Shutdown
LAxx
15
V
OUT
2
0.47F
V
OUT
Enable 34
0.47F
Shutdown
SOT-143 Version SOT-23-5 Version
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5203
(1)
Ordering Information
Part Number
Voltage Temperature Range Package
Standard Marking Pb-Free Marking
MIC5203-2.6BM4 LA26 MIC5203-2.6YM4 LA26 2.6V 40 to +125C SOT-143
MIC5203-2.8BM4 LA28 MIC5203-2.8YM4 LA28 2.8V 40 to +125C SOT-143
MIC5203-3.0BM4 LA30 MIC5203-3.0YM4 LA30 3.0V 40 to +125C SOT-143
MIC5203-3.3BM4 LA33 MIC5203-3.3YM4 LA33 3.3V 40 to +125C SOT-143
MIC5203-3.6BM4 LA36 MIC5203-3.6YM4 LA36 3.6V 40 to +125C SOT-143
MIC5203-3.8BM4 LA38 MIC5203-3.8YM4 LA38 3.8V 40 to +125C SOT-143
MIC5203-4.0BM4 LA40 MIC5203-4.0YM4 LA40 4.0V 40 to +125C SOT-143
MIC5203-4.5BM4 LA45 MIC5203-4.5YM4 LA45 4.5V 40 to +125C SOT-143
MIC5203-4.7BM4 LA47 MIC5203-4.7YM4 LA47 4.7V 40 to +125C SOT-143
MIC5203-5.0BM4 LA50 MIC5203-5.0YM4 LA50 5.0V 40 to +125C SOT-143
MIC5203-2.6BM5 LK26 MIC5203-2.6YM5 LK26 2.6V 40 to +125C SOT-23-5
MIC5203-2.8BM5 LK28 MIC5203-2.8YM5 LK28 2.8V 40 to +125C SOT-23-5
MIC5203-3.0BM5 LK30 MIC5203-3.0YM5 LK30 3.0V 40 to +125C SOT-23-5
MIC5203-3.3BM5 LK33 MIC5203-3.3YM5 LK33 3.3V 40 to +125C SOT-23-5
MIC5203-3.6BM5 LK36 MIC5203-3.6YM5 LK36 3.6V 40 to +125C SOT-23-5
MIC5203-3.8BM5 LK38 MIC5203-3.8YM5 LK38 3.8V 40 to +125C SOT-23-5
MIC5203-4.0BM5 LK40 MIC5203-4.0YM5 LK40 4.0V 40 to +125C SOT-23-5
MIC5203-4.5BM5 LK45 MIC5203-4.5YM5 LK45 4.5V 40 to +125C SOT-23-5
MIC5203-4.7BM5 LK47 MIC5203-4.7YM5 LK47 4.7V 40 to +125C SOT-23-5
MIC5203-5.0BM5 LK50 MIC5203-5.0YM5 LK50 5.0V 40 to +125C SOT-23-5
Note:
1. Other Voltage available. Contact Micrel for details.
M9999-111909
November 2009 2