mic39301 Micrel Semiconductor, mic39301 Datasheet - Page 10

• Manufacturer Part Number: mic39301
• Description: Mic39300/mic39301 3a Low-voltage Low-dropout Regulator
• Manufacturer: Micrel Semiconductor

MIC39300/39301
Minimum Load Current
The MIC39300/1 regulator is specified between finite loads.
If the output current is too small, leakage currents dominate
and the output voltage rises. A 10mA minimum load current
is necessary for proper regulation.
Error Flag
The MIC39301 version features an error flag circuit which
monitors the output voltage and signals an error condition
when the voltage drops 5% below the nominal output voltage.
The error flag is an open-collector output that can sink 10mA
during a fault condition.
Low output voltage can be caused by a number of problems,
including an overcurrent fault (device in current limit) or low
input voltage. The flag is inoperative during overtemperature
shutdown.
M9999-082605-A
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When the error flag is not used, it is best to leave it open. The
flag pin can be tied directly to pin 4, the output pin.
Enable Input
The MIC39301 version features an enable input for on/off
control of the device. Its shutdown state draws “zero” current
(only microamperes of leakage). The enable input is TTL/
CMOS compatible for simple logic interface, but can be
connected to up to 20V. When enabled, it draws approxi-
mately 15 A.
August 2005
Micrel, Inc.