Startseite Energiemanagement Linear- und Low-Dropout-Regler (LDO)

LM137

AKTIV

Negativer Spannungsregler/LDO mit einstellbarem Ausgang, 1,5 A, erweiterter Temperaturbereich

Produktdetails

Output options Adjustable Output Iout (max) (A) 1.5 Vin (max) (V) -4.2 Vin (min) (V) -40 Vout (max) (V) -1.2 Vout (min) (V) -37 Noise (µVrms) 1110 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 137 Rating Military Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 4 PSRR at 100 KHz (dB) 30 Dropout voltage (Vdo) (typ) (mV) 3000 Operating temperature range (°C) -55 to 150
Output options Adjustable Output Iout (max) (A) 1.5 Vin (max) (V) -4.2 Vin (min) (V) -40 Vout (max) (V) -1.2 Vout (min) (V) -37 Noise (µVrms) 1110 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 137 Rating Military Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 4 PSRR at 100 KHz (dB) 30 Dropout voltage (Vdo) (typ) (mV) 3000 Operating temperature range (°C) -55 to 150
TO-CAN (NDT) 3 91.6742 mm² 10.03 x 9.14
  • 1.5-A Output Current
  • Line Regulation 0.01%/V (Typical)
  • Load Regulation 0.3% (Typical)
  • 77-dB Ripple Rejection
  • 50 ppm/°C Temperature Coefficient
  • Thermal Overload Protection
  • Internal Short-Circuit Current Limiting
    Protections
  • 1.5-A Output Current
  • Line Regulation 0.01%/V (Typical)
  • Load Regulation 0.3% (Typical)
  • 77-dB Ripple Rejection
  • 50 ppm/°C Temperature Coefficient
  • Thermal Overload Protection
  • Internal Short-Circuit Current Limiting
    Protections

The LM137 and LM337-N are adjustable 3-terminal negative voltage regulators capable of supplying –1.5 A or more currents over an output voltage range of –1.25 V to –37 V. It requires only two external resistors to set the output voltage and one output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 and LM337-N feature internal current limiting, thermal shutdown and safe-area compensation, making it virtually blowout-proof against overloads.

The LM137 and LM337-N are ideal complements to the LM117 and LM317 adjustable positive regulators. The LM137 has a wider operating temperature range than the LM337-N and is also offered in military and space qualified versions.

The LM137 and LM337-N are adjustable 3-terminal negative voltage regulators capable of supplying –1.5 A or more currents over an output voltage range of –1.25 V to –37 V. It requires only two external resistors to set the output voltage and one output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 and LM337-N feature internal current limiting, thermal shutdown and safe-area compensation, making it virtually blowout-proof against overloads.

The LM137 and LM337-N are ideal complements to the LM117 and LM317 adjustable positive regulators. The LM137 has a wider operating temperature range than the LM337-N and is also offered in military and space qualified versions.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM137, LM337-N 3-Terminal Adjustable Negative Regulators datasheet (Rev. E) PDF | HTML 13 Jan 2016
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Application note AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) 06 Mai 2013
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 06 Mai 2013
Application note AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) 05 Mai 2013
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 05 Mai 2013
More literature Die D/S LM137H MDS MCD2120A 3-Terminal Adjustable Negative Regulator 20 Dez 2012
Application note Packaging Limits Range of Linear Regulators 08 Mai 2010
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 04 Jun 2008
Application note A New Production Technique for Trimming Voltage Regulators 03 Okt 2002
Application note Understanding the Terms and Definitions of LDO Voltage Regulators 21 Okt 1999

Design und Entwicklung

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