SNVS694C – JANUARY 2011 – REVISED APRIL 2013
Micropower Voltage Regulator
Check for Samples: SM72238
•2 Renewable Energy Grade
• High-Accuracy Output Voltage
• Ensured 100mA Output Current
• Extremely Low Quiescent Current
• Low Dropout Voltage
• Extremely Tight Load and Line Regulation
• Very Low Temperature Coefficient
• Use as Regulator or Reference
• Needs Minimum Capacitance for Stability
• Current and Thermal Limiting
• Stable With Low-ESR Output Capacitors
(10mΩ to 6Ω)
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.
The SM72238 is available in the surface-mount D-
Careful design of the SM72238 has minimized all
contributions 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.
Block Diagram and Typical Applications
Figure 1. SM72238
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