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1-A, negative low-dropout voltage regulator

Inventory: 5,329

Quality information

RoHS Exempt
REACH Affected
Lead finish / Ball material SN
MSL rating / Peak reflow Level-3-245C-168 HR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View

Packaging information

Package | Pins Package qty | Carrier Operating temperature range (°C)
TO-263 (KTT) | 3 45 | TUBE
-40 to 125
Package | Pins TO-263 (KTT) | 3
Package qty | Carrier 45 | TUBE
Operating temperature range (°C) -40 to 125
View TI packaging information

Features for the LM2990

  • 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

Description for the LM2990

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.


Qty Price (USD)
1-99 $2.765
100-249 $2.423
250-999 $1.699
1,000+ $1.369

Additional package qty | carrier options

Package qty | Carrier 500 | LARGE T&R
Inventory 21,958
Qty | Price (USD) 1ku | $1.144 1-99 $2.311 100-249 $2.025 250-999 $1.420 1,000+ $1.144