LM2990 Series

1-A, negative low-dropout voltage regulator

Catalog

1-A, negative low-dropout voltage regulator

Part	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Output (Min/Fixed)	Output Configuration	Current - Supply (Max) [Max]	Mounting Type	Voltage - Input (Max) [Max]	Number of Regulators	PSRR	Supplier Device Package	Package / Case	Voltage Dropout (Max) [Max]	Current - Quiescent (Iq)	Current - Output	Voltage - Output (Min/Fixed) [Min]
Texas Instruments LM2990T-12/NOPB	1.81 mOhm	125 °C	-40 °C	-12 V	Negative	5 mA	Through Hole	-26 V	1	52 dB	TO-220-3	TO-220-3	1 V	1 mA	1.8 A
Texas Instruments LM2990S-5.0/NOPB	1.81 mOhm	125 °C	-40 °C		Negative	5 mA	Surface Mount	-26 V	1	58 dB	TO-263 (DDPAK-3)	D2PAK (3 Leads + Tab) TO-263-4 TO-263AA	1 V	1 mA	1.8 A	-5 V
Texas Instruments LM2990S-12	1.81 mOhm	125 °C	-40 °C	-12 V	Negative	5 mA	Surface Mount	-26 V	1	52 dB	TO-263 (DDPAK-3)	D2PAK (3 Leads + Tab) TO-263-4 TO-263AA	1 V	1 mA	1.8 A
Texas Instruments LM2990T-15	1.81 mOhm	125 °C	-40 °C	-15 V	Negative	5 mA	Through Hole	-26 V	1	52 dB	TO-220-3	TO-220-3	1 V	1 mA	1.8 A
Texas Instruments LM2990SX-5.0/NOPB	1.81 mOhm	125 °C	-40 °C		Negative	5 mA	Surface Mount	-26 V	1	58 dB	TO-263 (DDPAK-3)	D2PAK (3 Leads + Tab) TO-263-4 TO-263AA	1 V	1 mA	1.8 A	-5 V
Texas Instruments LM2990SX-15	1.81 mOhm	125 °C	-40 °C	-15 V	Negative	5 mA	Surface Mount	-26 V	1	52 dB	TO-263 (DDPAK-3)	D2PAK (3 Leads + Tab) TO-263-4 TO-263AA	1 V	1 mA	1.8 A
Texas Instruments LM2990T-5.2	1.81 mOhm	125 °C	-40 °C		Negative	5 mA	Through Hole	-26 V	1	58 dB	TO-220-3	TO-220-3	1 V	1 mA	1.8 A	-5.2 V
Texas Instruments LM2990SX-5.0	1.81 mOhm	125 °C	-40 °C		Negative	5 mA	Surface Mount	-26 V	1	58 dB	TO-263 (DDPAK-3)	D2PAK (3 Leads + Tab) TO-263-4 TO-263AA	1 V	1 mA	1.8 A	-5 V
Texas Instruments LM2990T-12	1.81 mOhm	125 °C	-40 °C	-12 V	Negative	5 mA	Through Hole	-26 V	1	52 dB	TO-220-3	TO-220-3	1 V	1 mA	1.8 A
Texas Instruments LM2990T-15/NOPB	1.81 mOhm	125 °C	-40 °C	-15 V	Negative	5 mA	Through Hole	-26 V	1	52 dB	TO-220-3	TO-220-3	1 V	1 mA	1.8 A

Catalog

1-A, negative low-dropout voltage regulator

Key Features

• Input Voltage: –26 V to –6 VFixed Output Voltages: −5 V, −5.2 V, −12 V, and−15 V5% Output Accuracy over Entire Operating RangeOutput Current in Excess of 1 ADropout Voltage Typically 0.6 V at 1-A LoadLow Quiescent CurrentInternal Short-Circuit Current LimitInternal Thermal Shutdown with HysteresisFunctional Complement to the LM2940 SeriesInput Voltage: –26 V to –6 VFixed Output Voltages: −5 V, −5.2 V, −12 V, and−15 V5% Output Accuracy over Entire Operating RangeOutput Current in Excess of 1 ADropout Voltage Typically 0.6 V at 1-A LoadLow Quiescent CurrentInternal Short-Circuit Current LimitInternal Thermal Shutdown with HysteresisFunctional Complement to the LM2940 Series

Description

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.