May 9, 2011
SM72238
SolarMagic Micropower Voltage Regulator
General Description
Features
The SM72238 is a micropower voltage regulator with very low
quiescent current (75μA typ.) and very low dropout voltage
(typ. 40mV at light loads and 380mV at 100mA). It is ideally
suited for use in battery-powered systems. Furthermore, the
quiescent current of the SM72238 increases only slightly in
dropout, prolonging battery life.
Renewable Energy Grade
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High accuracy output voltage
Guaranteed 100mA output current
Extremely low quiescent current
Low dropout voltage
Extremely tight load and line regulation
The SM72238 is available in the surface-mount D-Pak pack-
age.
Very low temperature coefficient
Careful design of the SM72238 has minimized all contribu-
tions to the error budget. This includes a tight initial tolerance
(.5% typ.), extremely good load and line regulation (.05% typ.)
and a very low output voltage temperature coefficient, making
the part useful as a low-power voltage reference.
Use as Regulator or Reference
Needs minimum capacitance for stability
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Current and Thermal Limiting
Stable with low-ESR output capacitors (10mΩ to 6Ω)
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Block Diagram and Typical Applications
SM72238
30141325
© 2011 National Semiconductor Corporation
301413
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