Features: ·Output voltage adjustable from −3V to −24V, typically −2V to −25V·Output current in excess of 1A·Dropout voltage typically 0.6V at 1A load·Low quiescent current·Internal short circuit current limit·Internal thermal shutdown with hysteresis·TTL, CMOS compatible ON...
LM2991: Features: ·Output voltage adjustable from −3V to −24V, typically −2V to −25V·Output current in excess of 1A·Dropout voltage typically 0.6V at 1A load·Low quiescent current·In...
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Output Current | 1000 mA |
Output Min | -24 Volt |
Input Min Voltage | -26 Volt |
Input Max Voltage | 0.3 Volt |
Dropout Voltage | 0.6 Volt |
Adjustable Output | Yes |
Quiescent Current | 0.7 mA |
On/Off Pin | Yes |
Error Flag | No |
RegType | LDO |
Temperature Min | -40 deg C |
Temperature Max | 125 deg C |
Output Max | -3 Volt |
Output Voltage | Undefined Volt |
View Using Catalog |
The LM2991 is a low dropout adjustable negative regulator with a output voltage range between -3V to -24V. The LM2991 provides up to 1A of load current and features a On# /Off pin for remote shutdown capability.
The LM2991 uses new circuit design techniques to provide a low dropout voltage, low quiescent current and low temperature coefficient precision reference. 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 a 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).
The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods. The LM2991 is available in 5-lead TO-220 and TO-263 packages and is rated for operation over the automotive temperature range of -40°C to +125°C. Mil-Aero versions are also available.
Reliability Metrics
Part Number | Process | EFR Reject | EFR Sample Size | PPM | LTA Rejects | LTA Device Hours | FITS | MTTF (Hours) |
LM2991S | SLM | 0 | 42786 | 0 | 0 | 3352500 | 2 | 951281028 |
LM2991SX | SLM | 0 | 42786 | 0 | 0 | 3352500 | 2 | 951281028 |
LM2991T | SLM | 0 | 42786 | 0 | 0 | 3352500 | 2 | 951281028 |