MIC29371-3.3BT Micrel Inc, MIC29371-3.3BT Datasheet

IC REG LDO 750MA 3.3V TO-220-5

MIC29371-3.3BT

Manufacturer Part Number
MIC29371-3.3BT
Description
IC REG LDO 750MA 3.3V TO-220-5
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC29371-3.3BT

Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
Up to 26V
Voltage - Dropout (typical)
0.37V @ 750mA
Number Of Regulators
1
Current - Output
750mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Straight Leads)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-
MIC2937A/29371/29372
General Description
The MIC2937A family are “bulletproof” efficient voltage regu-
lators with very low dropout voltage (typically 40mV at light
loads and 300mV at 500mA), and very low quiescent current
(160µA typical). The quiescent current of the MIC2937A in-
creases only slightly in dropout, thus prolonging battery life.
Key MIC2937A features include protection against reversed
battery, fold-back current limiting, and automotive “load dump”
protection (60V positive transient).
The MIC2937 is available in several configurations. The
MIC2937A-xx devices are three pin fixed voltage regulators
with 3.3V, 5V, and 12V outputs available. The MIC29371 is
a fixed regulator offering logic compatible ON/OFF switching
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 MIC29372, which enables the
regulator to be switched on and off.
Pin Configuration
Five Lead Package Pin Functions:
1)
2)
3)
4)
5)
The TAB is Ground on the TO-220 and TO-263 packages.
May 2006
INPUT
MIC29371
Error
Input
Ground
Output
Shutdown
(MIC2937A-xxBU/WU)
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
TO-263 Package
GROUND OUTPUT
1
2
MIC29372
Adjust
Shutdown
Ground
Input
Output
3
(MIC29371/29372BU/WU)
TO-263-5 Package
1 2 3 4 5
1
Features
Applications
750mA Low-Dropout Voltage Regulator
High output voltage accuracy
Guaranteed 750mA output
Low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Input can withstand –20V reverse battery and +60V posi-
tive transients
Error flag warns of output dropout
Logic-controlled electronic shutdown
Output programmable from 1.24V to 26V(MIC29372)
Available in TO-220, TO-263, TO-220-5, and TO-263-5
packages.
Battery Powered Equipment
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
PCMCIA V
Bar Code Scanners
Automotive Electronics
SMPS Post-Regulator/ DC to DC Modules
High Efficiency Linear Power Supplies
INPUT
MIC2937A/29371/29372
(MIC2937A-xxBT/WT)
TO-220 Package
GROUND OUTPUT
1
CC
2
and V
3
PP
Regulation/Switching
(MIC29371/29372BT/WT)
MIC2937A/29371/29372
TO-220-5 Package
1 2 3 4 5
Micrel, Inc.

Related parts for MIC29371-3.3BT

MIC29371-3.3BT Summary of contents

Page 1

... The MIC2937 is available in several configurations. The MIC2937A-xx devices are three pin fixed voltage regulators with 3.3V, 5V, and 12V outputs available. The MIC29371 is a fixed regulator offering logic compatible ON/OFF switching input and an error flag output. This flag may also be used as a power-on reset signal ...

Page 2

... Part Number Standard RoHS Compliant* MIC2937A-3.3BU MIC2937A-3.3WU MIC2937A-3.3BT MIC2937A-3.3WT MIC2937A-5.0BU MIC2937A-5.0WU MIC2937A-5.0BT MIC2937A-5.0WT MIC2937A-12BU MIC2937A-12WU MIC2937A-12BT MIC2937A-12WT MIC29371-3.3BU MIC29371-3.3WU MIC29371-3.3BT MIC29371-3.3WT MIC29371-5.0BU MIC29371-5.0WU MIC29371-5.0BT MIC29371-5.0WT MIC29371-12BU MIC29371-12WU MIC29371-12BT MIC29371-12WT MIC29372BU MIC29372WU MIC29372BT MIC29372WT * RoHS compliant with ‘high-melting solder’ exemption. MIC2937A/29371/29372 Voltage Junction Temp ...

Page 3

... Electrical Characteristics Limits in standard typeface are for T = 25°C and limits in boldface apply over the full operating temperature range. Unless other- J wise specified 1V 5mA OUT L (MIC29371-xx and MIC29372 only). Symbol Parameter V Output Voltage O Accuracy ΔV Output Voltage O ΔT Temperature Coef. ...

Page 4

... Current Output Low V = 4.5V IN Voltage I = 250µA OL Upper Threshold (Note 9) Voltage Lower Threshold (Note 9) Voltage Hysteresis (Note 9) MIC29371/MIC29372 Shutdown Input Input Logic Voltage Low (ON) High (OFF) Shutdown Pin V = 2.4V SHUTDOWN Input Current V = 26V SHUTDOWN Regulator Output (Note 10) Current in Shutdown MIC2937A/29371/29372 (Continued) 4 Micrel, Inc ...

Page 5

... R15 100 k Ω R14 350 R16 k Ω R17 30 kΩ 10Ω Q29 Q19 Q28 R21 8 Ω Q31 Q30 SHDN R23 60 k Ω R22 R24 150 k Ω 50 kΩ DENOTES CONNECTION ON MIC2937A-xx AND MIC29371-xx VERSIONS ONLY MIC2937A/29371/29372 Micrel, Inc. . The maximum A ...

Page 6

MIC2937A/29371/29372 Typical Characteristics Dropout Voltage vs. Output Current 500 400 300 200 100 0 0 200 400 600 800 OUTPUT CURRENT (mA) Ground Current vs. Output Current 0 100 1000 OUTPUT CURRENT (mA) Ground Current ...

Page 7

... MIC2937A/29371/29372 MIC29371/2 Shutdown Current vs. Temperaure 125 100 -60 - 120 150 TEMPERATURE ( °C) MIC29372/3 Adjust Pin Current vs. Temperature 1mA 10 LOAD 0 -60 - 120 150 TEMPERATURE ( °C) May 2006 Load Transient 300 µF 150 OUT 0 -150 1000 -300 750 500 5mA 250 0 -250 - TIME (ms) ...

Page 8

... AC filter capacitor battery is used as the input. Error Detection Comparator Output (MIC29371) A logic low output will be produced by the comparator when- ever the MIC29371 output falls out of regulation by more than approximately 5%. This figure is the comparator’s built-in offset of about 75mV divided by the 1.235V reference volt- age. (Refer to the block diagram on Page 1). This trip level remains “ ...

Page 9

MIC2937A/29371/29372 with a bypass capacitor across R , since it reduces the high 1 frequency gain from 4 to unity. Pick C ≅ BYPASS π about 0.01µF. When doing this, the output capacitor must be increased ...

Page 10

MIC2937A/29371/29372 Package Information MIC2937A/29371/29372 3-Pin TO-263 (U) 3-Pin TO-220 (T) 10 Micrel, Inc. May 2006 ...

Page 11

MIC2937A/29371/29372 4 θ May 2006 1 θ 2 θ 1 θ 1 θ 3 θ 2 θ 3 θ 4 θ 5-Pin TO-263 (U) 5-Pin TO-220 (T) 11 Micrel, Inc. MIC2937A/29371/29372 ...

Page 12

... MIC2937A/29371/29372 MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...

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