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LM2991J-QMLV Scheda tecnica(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte LM2991J-QMLV
Spiegazioni elettronici  Negative Low Dropout Adjustable Regulator
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

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LM2991QML
Negative Low Dropout Adjustable Regulator
General Description
The LM2991 is a low dropout adjustable negative regulator
with a output voltage range between −2V to −25V. 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 tempera-
ture 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 regu-
lator is in the dropout mode (V
O −VI
≤ 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.
Features
n
Output voltage adjustable from −2V to −25V
n
Output current in excess of 1A
n
Dropout voltage typically 0.6V at 1A load
n
Low quiescent current
n
Internal short circuit current limit
n
Internal thermal shutdown with hysteresis
n
TTL, CMOS compatible ON/OFF switch
n
Functional complement to the LM2941 series
Applications
n
Post switcher regulator
n
Local, on-card, regulation
n
Battery operated equipment
Ordering Information
NS Part Number
SMD Part Number
NS Package Number
Package Description
LM2991J-QML
5962-9650501QEA
J16A
16LD Ceramic Dip
LM2991J-QMLV
5962-9650501VEA
J16A
16LD Ceramic Dip
LM2991WG-QML
5962-9650501QXA
WG16A
16LD Ceramic SOIC
Connection Diagrams
16-Lead Ceramic Dual-in-Line Package
20158729
Top View
See NS Package Number J16A
16-Lead Ceramic Surface-Mount Package
20158730
Top View
See NS Package Number WG16A
March 2006
© 2006 National Semiconductor Corporation
DS201587
www.national.com


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