LM2990T-5.0 National Semiconductor, LM2990T-5.0 Datasheet

IC, V REG LDO -5.0V, 2990, TO-220-3

LM2990T-5.0

Manufacturer Part Number
LM2990T-5.0
Description
IC, V REG LDO -5.0V, 2990, TO-220-3
Manufacturer
National Semiconductor
Datasheet

Specifications of LM2990T-5.0

Primary Input Voltage
-10V
Output Voltage
-5V
Dropout Voltage Vdo
600mV
No. Of Pins
3
Output Current
1A
Voltage Regulator Case Style
TO-220
Operating Temperature Range
-40°C To +125°C
Output Voltage Fixed
-5V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

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Quantity
Price
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LM2990T-5.0
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Quantity:
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© 2005 National Semiconductor Corporation
LM2990
Negative Low Dropout Regulator
General Description
The LM2990 is a three-terminal, low dropout, 1 ampere
negative voltage regulator available with fixed output volt-
ages of −5, −5.2, −12, and −15V.
The LM2990 uses new circuit design techniques to provide
low dropout and low quiescent current. 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 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
voltage accuracy is guaranteed to
perature extremes.
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
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 10Ω over the same operating temperature range as the regulator.
Ordering Information and Connection Diagrams
Temperature
−40˚C to
−55˚C to
+125˚C
+125˚C
Range
LM2990WG5.0-QML
5962-9571101QEA
5962-9571101QXA
LM2990J-5.0-QML
LM2990T-5.0
LM2990S-5.0
-5.0
OUT
±
5% over load, and tem-
− V
DS010801
IN
LM2990T-5.2
≤ 3V). Output
-5.2
Output Voltage
5962-9571001QEA
LM2990J-12-QML
LM2990 is available in a 3-lead TO-220 package and is rated
for operation over the automotive temperature range of
−40˚C to +125˚C.
Features
n 5% output accuracy over entire operating range
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 Functional complement to the LM2940 series
Applications
n Post switcher regulator
n Local, on-card, regulation
n Battery operated equipment
LM2990S-12
LM2990T-12
-12
01080101
5962-9570901QEA
LM2990J-15-QML
LM2990S-15
LM2990T-15
-15
www.national.com
June 2005
Package
WG16A
TO-220
TO-263
J16A

Related parts for LM2990T-5.0

LM2990T-5.0 Summary of contents

Page 1

... Locate the capacitor as close as possible to the regulator. The equivalent series resistance (ESR) is critical, and should be less than 10Ω over the same operating temperature range as the regulator. Ordering Information and Connection Diagrams Temperature Range -5.0 −40˚C to LM2990T-5.0 +125˚C LM2990S-5.0 −55˚C to LM2990J-5.0-QML +125˚C 5962-9571101QEA LM2990WG5 ...

Page 2

... Ordering Information and Connection Diagrams 3-Lead TO-220 Front View Order Number LM2990T-5.0, LM2990T-5.2, LM2990T-12 or LM2990T-15 See NS Package Number T03B TO-263 Surface-Mount Package Top View 01080112 Side View Order Number LM2990S-5.0, LM2990S-12 or LM2990S-15 See NS Package Number TS3B 16-Lead Ceramic Dual-in-Line Package Top View Order Number LM2990J-5 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage ESD Susceptibility (Note 2) Power Dissipation (Note 3) Junction Temperature (T ) Jmax Storage Temperature Electrical Characteristics V = − (Note 1A O(NOM) O ing temperature range, −40˚C ≤ T ≤ ...

Page 4

Electrical Characteristics V = − (Note 1A O(NOM) O ing temperature range, −40˚C ≤ T ≤ 125˚C, all other limits apply for T J Parameter ≤ 1A Quiescent Current ( ...

Page 5

Typical Performance Characteristics Dropout Voltage LM2990-5.0 and LM2990-5.2 Quiescent Current LM2990-15 Quiescent Current Normalized Output Voltage 01080114 01080116 LM2990-5 and LM2990-5.2 01080118 5 01080115 LM2990-12 Quiescent Current 01080117 Low Voltage Behavior 01080119 www.national.com ...

Page 6

Typical Performance Characteristics LM2990-5 and LM2990-5.2 Line Transient Response LM2990-12 and LM2990-15 Low Voltage Behavior LM2990-12 and LM2990-15 Load Transient Response www.national.com (Continued) LM2990-5 and LM2990-5.2 Load Transient Response 01080120 LM2990-12 and LM2990-15 Line Transient Response 01080122 LM2990-5 and LM2990-5.2 ...

Page 7

Typical Performance Characteristics LM2990-5 and LM2990-5.2 Output Impedance LM2990-12 and LM2990-15 Ripple Rejection Maximum Output Current (Continued) Maximum Output Current 01080126 LM2990-12 and LM2990-15 01080128 01080130 7 01080127 Output Impedance 01080129 Maximum Power Dissipation (TO-220) 01080131 www.national.com ...

Page 8

Typical Performance Characteristics Maximum Power Dissipation (TO-263) (See (Note 3)) Typical Applications Post Regulator for an Isolated Switching Power Supply The LM2940 is a positive 1A low dropout regulator; refer to its datasheet for further information. Fixed Current Sink www.national.com ...

Page 9

Application Hints EXTERNAL CAPACITORS The LM2990 regulator requires an output capacitor to main- tain stability. The capacitor must be at least 10 µF aluminum electrolytic or 1 µF solid tantalum. The output capacitor’s ESR must be less than 10Ω, or ...

Page 10

www.national.com 10 ...

Page 11

... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM2990T-5.0, LM2990T-5.2, LM2990T-12 or LM2990T-15 TO-220 3–Lead Molded Package NS Package Number T03B 11 www.national.com ...

Page 12

Physical Dimensions Order Number LM2990S-5.0, LM2990S-12 or LM2990S-15 LM2990J-5.0-QML (5962-9571101QEA), LM2990J-12-QML (5962-9571001QEA), or LM2990J-15-QML www.national.com inches (millimeters) unless otherwise noted (Continued) TO-263 3-Lead Plastic Surface Mount Package NS Package Number TS3B 16–Lead Ceramic Dual–in–Line Package (5962-9570901QEA), NS Package Number J16A ...

Page 13

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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