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MIC2920A Fiches technique(PDF) 1 Page - Micrel Semiconductor

No de pièce MIC2920A
Description  400mA Low-Dropout Voltage Regulator
Download  9 Pages
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Fabricant  MICREL [Micrel Semiconductor]
Site Internet  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2920A Fiches technique(HTML) 1 Page - Micrel Semiconductor

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MIC2920A/29201/29202/29204
Micrel
January 1998
3-9
3
12
3
MIC2920A/29201/29202/29204
400mA Low-Dropout Voltage Regulator
Features
High output voltage accuracy
Guaranteed 400mA output
Low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Input withstands –20V reverse battery and
60V positive transients
Error flag warns of output dropout
Logic-controlled electronic shutdown
Output programmable from 1.24V to 26V
(MIC29202/MIC29204)
Available in TO-220, TO-220-5, and surface-mount
TO-263-5, SOT-223, and SO-8 packages.
Applications
Battery-powered equipment
Cellular telephones
Laptop, notebook, and palmtop computers
PCMCIA V
CC and VPP regulation/switching
Bar code scanners
Automotive electronics
SMPS post-regulators
Voltage reference
High-efficiency linear power supplies
General Description
The MIC2920A family are “bulletproof,” efficient voltage
regulators with very low dropout voltage (typically 40mV at
light loads and 370mV at 250mA), and very low quiescent
current (140
µAtypical).ThequiescentcurrentoftheMIC2920A
increases only slightly in dropout, prolonging battery life. Key
MIC2920A features include protection against reversed battery,
fold-back current limiting, and automotive “load dump”
protection (60V positive transient).
The MIC2920 is available in several configurations. The
MIC2920A-x.x devices are three pin fixed voltage regulators
available in 3.3V, 4.85V, 5V, and 12V outputs. The MIC29201
is a fixed regulator offering a logic compatible ON/OFF
(shutdown) input and an error flag output. This flag may also
be used as a power-on reset signal. A logic-compatible
shutdown input is provided on the adjustable MIC29202
which allows the regulator to be switched on and off. The
MIC29204 8-pin SOIC adjustable regulator includes both
shutdown and error flag pins and may be pin-strapped for 5V
output or programmed from 1.24V to 26V using two external
resistors.
MIC2920A-xxBT
(TO-220)
MIC29201/29202BT
(TO-220-5)
12345
MIC29201/29202BU
(TO-263-5)
5-Lead Package Pinouts
MIC29201
MIC29202
1)
Error
Adjust
2)
Input
Shutdown
3)
Ground
Ground
4)
Output
Input
5)
Shutdown
Output
Tab is Ground on SOT-223, TO-220, and TO-263 packages.
13
2
TAB
INPUT
OUTPUT
GROUND
MIC2920A-x.xBS
(SOT-223)
Pin Configuration
12345
INPUT
OUTPUT
GROUND
1
2
3
4
8
7
6
5
INPUT
NC
NC
ERROR
OUTPUT
SENSE
SHUTDOWN
GROUND
MIC29201-3.3BM (SO-8)
1
2
3
4
8
7
6
5
INPUT
ADJUST
5V TAP
ERROR
OUTPUT
SENSE
SHUTDOWN
GROUND
MIC29204BM (SO-8)


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