MIC69301_11 Datasheet, PDF (10/13 Pages) Micrel Semiconductor – Single Supply VIN, Low VIN, Low VOUT, 3ALDO

Micrel, Inc.
The heat sink may be significantly reduced in
applications where the minimum input voltage is known
and is large compared with the dropout voltage. Use a
series input resistor to drop excessive voltage and
distribute the heat between this resistor and the
regulator. The low dropout properties of Micrel Super
βeta PNP^® regulators allow significant reductions in
regulator power dissipation and the associated heat sink
MIC69301/2/3
without compromising performance. When this technique
is employed, a capacitor of at least 1.0µF is needed
directly between the input and regulator ground.
Refer to “Application Note 9” for further details and
examples on thermal design and heat sink applications.
March 2011
10
M9999-032111-F