LM2990T-12/NOPB
Active1-A, NEGATIVE LOW-DROPOUT VOLTAGE REGULATOR
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LM2990T-12/NOPB
Active1-A, NEGATIVE LOW-DROPOUT VOLTAGE REGULATOR
Technical Specifications
Parameters and characteristics for this part
| Specification | LM2990T-12/NOPB |
|---|---|
| Current - Output | 1.8 A |
| Current - Quiescent (Iq) | 1 mA |
| Current - Supply (Max) [Max] | 5 mA |
| Mounting Type | Through Hole |
| Number of Regulators | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Negative |
| Output Type | 1.81 mOhm |
| Package / Case | TO-220-3 |
| PSRR | 52 dB |
| Supplier Device Package | TO-220-3 |
| Voltage - Input (Max) [Max] | -26 V |
| Voltage - Output (Min/Fixed) | -12 V |
| Voltage Dropout (Max) [Max] | 1 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 3.13 | |
| 10 | $ 2.81 | |||
| 45 | $ 2.66 | |||
| 135 | $ 2.31 | |||
| 270 | $ 2.19 | |||
| 540 | $ 1.96 | |||
| 1035 | $ 1.66 | |||
| 2520 | $ 1.57 | |||
| 5040 | $ 1.51 | |||
| Texas Instruments | TUBE | 1 | $ 2.36 | |
| 100 | $ 2.07 | |||
| 250 | $ 1.45 | |||
| 1000 | $ 1.17 | |||
Description
General part information
LM2990 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.
