Negative Low Dropout Regulator

The LM2990 is a three-terminal, low dropout, 1 ampere negative voltage Regulator available with fixed output voltages of -5, -5.2, -12, and -15V.
The LM2990 uses new circuit design techniques to provide low dropout and low quiescent current. The dropout voltage at 1A load current is typically 0.6V and a guaranteed worst-case maximum of 1V over the entire operating temperature range. The quiescent current is typically 1 mA with 1A load current and an input-output voltage differential greater than 3V. 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 <= 3V). Output voltage accuracy is guaranteed to 5% over load, and temperature extremes.
The LM2990 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time. The LM2990 is available in a 3-lead TO-220 package and is rated for operation over the automotive temperature range of -40C to +125C.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM2990S-15 Texas Instruments Negative Low Dropout Regulator 3-DDPAK/TO-263 -40 to 125
LM2990SX-15/NOPB Texas Instruments Negative Low Dropout Regulator 3-DDPAK/TO-263 -40 to 125
LM2990T-5.0/NOPB Texas Instruments Negative Low Dropout Regulator 3-TO-220 -40 to 125
LM2990T-5.2 Texas Instruments Negative Low Dropout Regulator 3-TO-220 -40 to 125
LM2990S-5.0/NOPB Texas Instruments Negative Low Dropout Regulator 3-DDPAK/TO-263 -40 to 125
LM2990T-15 Texas Instruments Negative Low Dropout Regulator 3-TO-220 -40 to 125
LM2990SX-12 Texas Instruments Negative Low Dropout Regulator 3-DDPAK/TO-263 -40 to 125
LM2990T-12 Texas Instruments Negative Low Dropout Regulator 3-TO-220 -40 to 125
LM2990T-15/NOPB Texas Instruments Negative Low Dropout Regulator 3-TO-220 -40 to 125
LM2990SX-5.0/NOPB Texas Instruments Negative Low Dropout Regulator 3-DDPAK/TO-263 -40 to 125
LM2990 's PackagesLM2990 's pdf datasheet
LM2990T-12 TO-220
LM2990T-15 TO-220
LM2990T-5.0 TO-220
LM2990T-5.2 TO-220
LM2990S-12 TO-263
LM2990S-15 TO-263
LM2990S-5.0 TO-263
LM2990SX-12 TO-263
LM2990SX-15 TO-263
LM2990SX-5.0 TO-263
LM2990-5.0-MD8
LM2990-15-MD8
LM2990-15-MW8
LM2990-5.0-MW8




LM2990 Pinout, Pinouts
LM2990 pinout,Pin out
This is one package pinout of LM2990,If you need more pinouts please download LM2990's pdf datasheet.

LM2990 Application circuits
LM2990 circuits
This is one application circuit of LM2990,If you need more circuits,please download LM2990's pdf datasheet.


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