MIC2951

The MIC2950 and MIC2951 are "bulletproof" micropower voltage regulators with very low dropout voltage (typically 40mV at light loads and 250mV at 100mA) and very low quiescent currents. Like their predecessors, the LP2950 and LP2951, the quiescent current of the MIC2950/MIC2951 increases only slightly in dropout, thus prolonging battery life. The MIC2950/MIC2951 are pin-for-pin compatible with the LP2950/LP2951, but offer lower dropout, lower quiescent current, reverse battery protection, and automotive load dump protection.

The key additional features and protection offered include higher output current (150mA), positive transient protection for up to 60V (load dump), and the ability to survive an unregulated input voltage transient of -20V below ground (reverse battery).

The plastic DIP and SOIC versions offer additional system functions such as programmable output voltage and logic-controlled shutdown. The 3-pin TO-92 MIC2950 is pin-for-pin compatible with the older 5V regulators.

These system functions also include an error flag output that warns of a low output voltage, which is often due to failing batteries on the input. This may also be used as a power-on reset. A logic-compatible shutdown input is also available that enables the regulator to be switched on and off. This part may also be pin-strapped for a 5V output or programmed from 1.24V to 29V with the use of two external resistors.

产品特性
  • High accuracy: 3.3V, 4.85V, or 5V with guaranteed 150mA output
  • Extremely low quiescent current
  • Low-dropout voltage
  • Extremely tight load and line regulation
  • Very low temperature coefficient
  • Use as regulator or reference
  • Needs only 1.5µF for stability
  • Current and thermal limiting
  • Unregulated DC input can withstand –20V reverse battery and +60V positive transients
  • Error flag warns of output dropout (MIC2951)
  • Logic-controlled electronic shutdown (MIC2951)
  • Output programmable from 1.24V to 29V (MIC2951)
技术参数
aspxParamName aspxParamValue aspxParamValue
Product Type Single LDOs Single LDOs
# of Out 1 1
IOUT #1
IOUT #2
IOUT #3
IOUT #4
IOUT (mA) 150 150
VIN Min (V) 2 2
VIN Max (V) 30 30
VOUT (V) 3.3, 5.0 3.3, 5.0
Voltage Drop Typ (mV) 320 320
IGND Typ (µA) 120 120
Tol Typ % ±1 ±1
Noise (µV) rms 100 100
PSRR 1 kHz (dB) 67 67
Soft Start Pin
Load Dump Yes Yes
Rev Bat Yes Yes
Reverse Current Protect
文档资料
MIC2950/2951 - 150mA Low-Dropout Voltage RegulatorData Sheets11/09/20151055KB
Micrel AN 12 - Design Considerations for 5V to 3.3V Pass RegulatorsAppNote10/01/201528KB
Micrel AN 43 - Improving Adjustable Regulator AccuracyAppNote10/01/201559KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC2951-02YM8SOIC-40C to +125CTUBE1.000.840.760.630.58
MIC2951-02YM-TR8SOIC-40C to +125CT/R1.000.840.760.630.58
MIC2951-03YM8SOIC-40C to +125CTUBE0.950.790.720.600.55
MIC2951-03YMM8MSOP-40C to +125CTUBE1.160.970.880.730.68
MIC2951-03YMM-TR8MSOP-40C to +125CT/R1.160.970.880.730.68
MIC2951-03YM-TR8SOIC-40C to +125CT/R0.950.790.720.600.55
MIC2951-03YN8PDIP-40C to +125CTUBE1.080.900.820.680.63
MIC2951-3.3YM8SOIC-40C to +125CTUBE0.950.790.720.600.55
MIC2951-3.3YM-TR8SOIC-40C to +125CT/R0.950.790.720.600.55
器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2951-03YN0.4867000.9000008PDIP.300inMatte Tine3
MIC29510-3.3WT1.8902002.6600003TO-220-Matte Tine3
MIC29510-5.0WT1.8902002.6600003TO-220-Matte Tine3
MIC29512WT1.9839003.1200005TO-220-Matte Tine3
MIC2951-02YM0.0750000.1632658SOIC3.90mm(.150in)NiPdAue4
MIC2951-02YM-TR0.0750000.2500008SOIC3.90mm(.150in)NiPdAue4
MIC2951-03YM0.0750000.1632658SOIC3.90mm(.150in)NiPdAue4
MIC2951-03YM-TR0.0750000.2500008SOIC3.90mm(.150in)NiPdAue4
MIC2951-3.3YM0.0750000.1632658SOIC3.90mm(.150in)NiPdAue4
MIC2951-3.3YM-TR0.0750000.2500008SOIC3.90mm(.150in)NiPdAue4
MIC2951-4.8YM0.0750000.1632658SOIC3.90mm(.150in)NiPdAue4
MIC2951-4.8YM-TR0.0750000.2500008SOIC3.90mm(.150in)NiPdAue4
MIC2951-3.3YMM-TR0.0251000.3347008MSOP3x3x1.0mmNiPdAue4
MIC2951-03YMM-TR0.0251000.3347008MSOP3x3x1.0mmNiPdAue4
MIC2951-3.3YMM0.0251000.1246008MSOP3x3x1.0mmNiPdAue4
MIC2951-03YMM0.0251000.1246008MSOP3x3x1.0mmNiPdAue4
MIC2950/2951 - 150mA Low-Dropout Voltage Regulator MIC2951
Micrel AN 12 MIC2951
Micrel AN 43 MIC29752