Product details

Output options Fixed Output, Negative Output Iout (Max) (A) 1 Vin (Max) (V) -6 Vin (Min) (V) -26 Vout (Max) (V) -5 Vout (Min) (V) -15 Fixed output options (V) -5, -5.2, -12, -15 Noise (uVrms) 250 Iq (Typ) (mA) 1 Thermal resistance θJA (°C/W) 23 Rating Catalog Load capacitance (Min) (µF) 10 Regulated outputs (#) 1 Features Accuracy (%) 4.9 PSRR @ 100 KHz (dB) 23 Dropout voltage (Vdo) (Typ) (mV) 600 Operating temperature range (C) -40 to 125
Output options Fixed Output, Negative Output Iout (Max) (A) 1 Vin (Max) (V) -6 Vin (Min) (V) -26 Vout (Max) (V) -5 Vout (Min) (V) -15 Fixed output options (V) -5, -5.2, -12, -15 Noise (uVrms) 250 Iq (Typ) (mA) 1 Thermal resistance θJA (°C/W) 23 Rating Catalog Load capacitance (Min) (µF) 10 Regulated outputs (#) 1 Features Accuracy (%) 4.9 PSRR @ 100 KHz (dB) 23 Dropout voltage (Vdo) (Typ) (mV) 600 Operating temperature range (C) -40 to 125
TO-220 (NDE) 3 47 mm² 10.16 x 4.58 TO-263 (KTT) 3 155 mm² 10.16 x 15.24
  • Input Voltage: –26 V to –6 V
  • Fixed Output Voltages: −5 V, −5.2 V, −12 V, and
    −15 V
  • 5% Output Accuracy over Entire Operating Range
  • Output Current in Excess of 1 A
  • Dropout Voltage Typically 0.6 V at 1-A Load
  • Low Quiescent Current
  • Internal Short-Circuit Current Limit
  • Internal Thermal Shutdown with Hysteresis
  • Functional Complement to the LM2940 Series
  • Input Voltage: –26 V to –6 V
  • Fixed Output Voltages: −5 V, −5.2 V, −12 V, and
    −15 V
  • 5% Output Accuracy over Entire Operating Range
  • Output Current in Excess of 1 A
  • Dropout Voltage Typically 0.6 V at 1-A Load
  • Low Quiescent Current
  • Internal Short-Circuit Current Limit
  • Internal Thermal Shutdown with Hysteresis
  • Functional Complement to the LM2940 Series

The LM2990 is a three-terminal, low-dropout, 1-A negative voltage regulator available with fixed output voltages of −5 V, −5.2 V, −12 V, and −15 V.

The LM2990 uses circuit design techniques to provide low-dropout and low-quiescent current. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3 V). Output voltage accuracy is ensured to ±5% over load and temperature extremes.

The LM2990 also implements short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time.

All these features make the LM2990 an ideal negative power supply suited for dual supply systems. The device may also be used as fixed or adjustable current sink load.

The LM2990 is available in two 3-pin packages and is rated for operation over the junction temperature range of −40°C to 125°C.

The LM2990 is a three-terminal, low-dropout, 1-A negative voltage regulator available with fixed output voltages of −5 V, −5.2 V, −12 V, and −15 V.

The LM2990 uses circuit design techniques to provide low-dropout and low-quiescent current. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3 V). Output voltage accuracy is ensured to ±5% over load and temperature extremes.

The LM2990 also implements short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time.

All these features make the LM2990 an ideal negative power supply suited for dual supply systems. The device may also be used as fixed or adjustable current sink load.

The LM2990 is available in two 3-pin packages and is rated for operation over the junction temperature range of −40°C to 125°C.

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Technical documentation

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Type Title Date
* Data sheet LM2990 Negative Low-Dropout Regulator datasheet (Rev. G) 15 May 2015
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Application note Linear and Switching Voltage Regulator Fundamental Part 1 21 Mar 2007

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DDPAK/TO-263 (KTT) 3 View options
TO-220 (NDE) 3 View options

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