|Package | PIN:||KC | 5|
|Temp:||Q (-40 to 125)|
- Output Voltage Adjustable from −3 V to −24 V, Typically −2 V to −25 V
- 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
- TTL, CMOS Compatible ON/OFF Switch
- Functional Complement to the LM2941 Series
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Texas Instruments LM2991T/NOPB
The LM2991 is a low dropout adjustable negative regulator with a output voltage rangebetween −3 V to −24 V. The LM2991 provides up to 1 A of load current and features aON /OFF pin for remote shutdown capability.
The LM2991 uses new circuit design techniques to provide a low dropout voltage, lowquiescent current and low temperature coefficient precision reference. The dropout voltage at 1-Aload current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operatingtemperature range. The quiescent current is typically 1 mA with a 1-A load current and aninput-output voltage differential greater than 3 V. A unique circuit design of the internal biassupply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropoutmode (VOUT − VIN ≤ 3 V).
The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhancethe reliability of the device when inadvertently overloaded for extended periods. The LM2991 isavailable in 5-lead TO-220 and DDPAK/TO-263 packages and is rated for operation over the automotivetemperature range of −40°C to +125°C. Mil-Aero versions are also available.