LM2990S-5.0 National Semiconductor, LM2990S-5.0 Datasheet

LM2990S-5.0

Manufacturer Part Number

LM2990S-5.0

Description

IC, LDO VOLT REG, -5V, 1.5A, TO-263

Manufacturer

National Semiconductor

Datasheet

1.LM2990S-5.0.pdf (14 pages)

Specifications of LM2990S-5.0

Primary Input Voltage

-26V

Output Voltage Fixed

-5V

Dropout Voltage Vdo

600mV

No. Of Pins

Output Current

1.5A

Operating Temperature Range

-40Â°C To +125Â°C

Termination Type

SMD

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

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Negative Low Dropout Regulator

General Description

The LM2990 is a three-terminal, low dropout, 1 ampere neg-

ative voltage regulator available with fixed output voltages 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 regulator

is in the dropout mode (V

curacy is guaranteed to ±5% over load, and temperature

extremes.

The LM2990 is short-circuit proof, and thermal shutdown in-

cludes hysteresis to enhance the reliability of the device when

overloaded for an extended period of time. The LM2990 is

available in a 3-lead TO-220 package and is rated for opera-

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

Range

LM2990WG5.0-QML

5962-9571101QEA

5962-9571101QXA

LM2990J-5.0-QML

LM2990T-5.0

LM2990S-5.0

OUT

-5.0

− V

≤

3V). Output voltage ac-

10801

LM2990T-5.2

-5.2

Output Voltage

LM2990

5962-9571001QEA

LM2990J-12-QML

tion over the automotive temperature range of −40°C to +125°

Features

■

Applications

■

LM2990S-12

LM2990T-12

5% output accuracy over entire operating range

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

Functional complement to the LM2940 series

Post switcher regulator

Local, on-card, regulation

Battery operated equipment

-12

1080101

5962-9570901QEA

LM2990J-15-QML

LM2990T-15

LM2990S-15

-15

August 31, 2010

www.national.com

Package

WG16A

TO-220

TO-263

J16A

Related parts for LM2990S-5.0

LM2990S-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 LM2990WG5.0-QML 5962-9571101QXA © 2010 National Semiconductor Corporation LM2990 tion over the automotive temperature range of − ...

Page 2

... 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 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-5.0-QML (5962-9571101QEA), LM2990J-12-QML (5962-9571001QEA), or LM2990J-15-QML (5962-9570901QEA), See NS Package Number J16A www ...

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 Electrical Characteristics V = − (Note 1A O(NOM) O ≤ ≤ temperature range, −40°C T 125° ...

Page 4

Parameter ≤ Quiescent Current ( 1A 1Ω Short Circuit Current R L Maximum Output Current (Note 7) Ripple Rejection ripple ƒ kHz, I ripple ...

Page 5

Typical Performance Characteristics Dropout Voltage LM2990-5.0 and LM2990-5.2 Quiescent Current LM2990-15 Quiescent Current Normalized Output Voltage 1080114 1080116 LM2990-5 and LM2990-5.2 Low Voltage Behavior 1080118 5 1080115 LM2990-12 Quiescent Current 1080117 1080119 www.national.com ...

Page 6

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 LM2990-5 and LM2990-5.2 Load Transient Response 1080120 LM2990-12 and LM2990-15 Line Transient Response 1080122 LM2990-5 and LM2990-5.2 1080124 6 1080121 1080123 ...

Page 7

LM2990-5 and LM2990-5.2 Output Impedance 1080126 LM2990-12 and LM2990-15 Ripple Rejection 1080128 Maximum Output Current 1080130 Maximum Output Current LM2990-12 and LM2990-15 Output Impedance Maximum Power Dissipation (TO-220) 7 1080127 1080129 1080131 www.national.com ...

Page 8

Maximum Power Dissipation (TO-263) (See 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 (Note 3)) 1080132 1080107 8 ...

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

Equivalent Schematic 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

... 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 (5962-9570901QEA), www.national.com TO-263 3-Lead Plastic Surface Mount Package NS Package Number TS3B 16–Lead Ceramic Dual–in–Line Package NS Package Number J16A 12 ...

Page 13

Ceramic Surface–Mount Package LM2990WG5.0-QML (5962-9571101QXA) NS Package Number WG16A 13 www.national.com ...

Page 14

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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