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LM2991

Texas Instruments
Part Number LM2991
Manufacturer Texas Instruments
Description Negative Low-Dropout Adjustable Regulator
Published Aug 28, 2020
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community LM2991 SNVS099I – MAY 1999 – REVI...
Datasheet PDF File LM2991 PDF File

LM2991
LM2991


Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community LM2991 SNVS099I – MAY 1999 – REVISED OCTOBER 2016 LM2991 Negative Low-Dropout Adjustable Regulator 1 Features •1 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 2 Applications • Post Switcher Regulator • Local, On-Card, Regulation • Battery Operated Equipment • Industrial • Instrumentation 3 Description The LM2991 is a low dropout adjustable negative regulator with a output voltage range between −3 V to −24 V.
The LM2991 provides up to 1 A 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 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 a 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).
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 5lead TO-220 and DDPAK/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.
Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM2991 DDPAK/TO-263 (5) TO-220 (5) 10.
20 mm × 9.
00 mm 14.
99 mm × 10.
16 mm (1) For all av...


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