MIC2920A Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 400mA Low-Dropout Voltage Regulator

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