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LM2990SX-5.0 Folha de dados(PDF) 1 Page - Texas Instruments

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Nome de Peças LM2990SX-5.0
Descrição Electrónicos  LM2990 Negative Low Dropout Regulator
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

LM2990SX-5.0 Folha de dados(HTML) 1 Page - Texas Instruments

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LM2990
www.ti.com
SNVS093D – JUNE 1999 – REVISED APRIL 2013
LM2990 Negative Low Dropout Regulator
Check for Samples: LM2990
1
FEATURES
DESCRIPTION
The LM2990 is a three-terminal, low dropout, 1
2
5% Output Accuracy over Entire Operating
ampere negative voltage regulator available with fixed
Range
output voltages of
−5, −5.2, −12, and −15V.
Output Current in Excess of 1A
The LM2990 uses new circuit design techniques to
Dropout Voltage Typically 0.6V at 1A Load
provide low dropout and low quiescent current. The
Low Quiescent Current
dropout voltage at 1A load current is typically 0.6V
and an ensured worst-case maximum of 1V over the
Internal Short Circuit Current Limit
entire operating temperature range. The quiescent
Internal Thermal Shutdown with Hysteresis
current is typically 1 mA with 1A load current and an
Functional Complement to the LM2940 Series
input-output voltage differential greater than 3V. A
unique circuit design of the internal bias supply limits
APPLICATIONS
the quiescent current to only 9 mA (typical) when the
regulator is in the dropout mode (VOUT − VIN ≤ 3V).
Post Switcher Regulator
Output voltage accuracy is ensured to ±5% over load,
Local, On-Card, Regulation
and temperature extremes.
Battery Operated Equipment
The LM2990 is short-circuit proof, and thermal
shutdown
includes
hysteresis
to
enhance
the
reliability of the device when overloaded for an
extended period of time. The LM2990 is available in a
3-lead package and is rated for operation over the
automotive temperature range of
−40°C to +125°C.
Typical Application
*Required if the regulator is located further than 6 inches from the power supply filter capacitors. A 1
μF solid
tantalum or a 10
μF aluminum electrolytic capacitor is recommended.
**Required for stability. Must be at least a 10
μF aluminum electrolytic or a 1 μF solid tantalum to maintain stability.
May be increased without bound to maintain regulation during transients. Locate the capacitor as close as possible to
the regulator. The equivalent series resistance (ESR) is critical, and should be less than 10
Ω over the same operating
temperature range as the regulator.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1999–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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