MIC2937A

The MIC2937A family are "bulletproof" efficient voltage regulators 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 increases 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 3-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 that enables the regulator to be switched on and off.

Features
  • 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 positive 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
Parameter
Parameter Name Value Value
Product Type Single LDOs Single LDOs
# of Out 1 1
IOUT #1
IOUT #2
IOUT #3
IOUT #4
IOUT (mA) 750 750
VIN Min (V) 4.3 4.3
VIN Max (V) 26 26
VOUT (V) 3.3, 5.0, 12 3.3, 5.0, 12
Voltage Drop Typ (mV) 370 370
IGND Typ (µA) 160 160
Tol Typ % ±1 ±1
Noise (µV) rms 260 260
Soft Start Pin
Load Dump Yes Yes
Rev Bat Yes Yes
Reverse Current Protect Yes Yes
Documents
MIC2937A/29371/29372 - 750mA Low-Dropout Voltage RegulatorData Sheets11/09/2015252KB
Micrel AN 12 - Design Considerations for 5V to 3.3V Pass RegulatorsAppNote10/01/201528KB
Micrel AN 43 - Improving Adjustable Regulator AccuracyAppNote10/01/201559KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC2937A-3.3WT3TO-220-40C to +125CTUBE2.241.871.701.421.31
MIC2937A-3.3WU3TO-263-40C to +125CTUBE2.371.981.801.501.38
MIC2937A-3.3WU-TR3TO-263-40C to +125CT/R2.371.981.801.501.38
MIC2937A-5.0WT3TO-220-40C to +125CTUBE2.371.981.801.501.38
MIC2937A-5.0WU3TO-263-40C to +125CTUBE**********
MIC2937A-5.0WU-TR3TO-263-40C to +125CT/R2.512.091.901.581.46
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2937A-5.0WT1.8902002.6600003TO-220-Matte Tine3
MIC2937A-3.3WT1.8902002.6600003TO-220-Matte Tine3
MIC2937A-12WT1.8902002.6600003TO-220-Matte Tine3
MIC2937A-12WU-TR1.5110002.5066673TO-263-Matte Tine3
MIC2937A-5.0WU1.5110002.3600003TO-263-Matte Tine3
MIC2937A-3.3WU-TR1.5110002.5066673TO-263-Matte Tine3
MIC2937A-3.3WU1.5110002.3600003TO-263-Matte Tine3
MIC2937A-5.0WU-TR1.5110002.5066673TO-263-Matte Tine3
MIC2937A-12WU1.5110002.3600003TO-263-Matte Tine3
MIC2937A/29371/29372 - 750mA Low-Dropout Voltage Regulator MIC2937A
Micrel AN 12 MIC2951
Micrel AN 43 MIC29752