LM2940T-12.0/NOPB National Semiconductor, LM2940T-12.0/NOPB Datasheet

LM2940T-12.0/NOPB

Manufacturer Part Number

LM2940T-12.0/NOPB

Description

IC REGULATOR LDO 12.0V TO220-3

Manufacturer

National Semiconductor

Type

Voltage Regulatorr

Datasheets

1.LM2940IMP-5.0NOPB.pdf (20 pages)

2.LM2940CT-5.0NOPB.pdf (6 pages)

Specifications of LM2940T-12.0/NOPB

Regulator Topology

Positive Fixed

Voltage - Output

12V

Voltage - Input

13.6 ~ 26 V

Voltage - Dropout (typical)

0.5V @ 1A

Number Of Regulators

Current - Output

Operating Temperature

-40°C ~ 125°C

Mounting Type

Through Hole

Package / Case

TO-220-3 (Straight Leads)

Current, Output

1 A

Current, Supply

30 mA

Package Type

TO-220

Regulation, Line

20 mV

Regulation, Load

55 mV

Regulator Type

Low Dropout

Resistance, Thermal, Junction To Case

4 °C/W

Temperature, Operating, Range

-40 to +125 °C

Voltage, Dropout

0.5 V

Voltage, Input

26 V

Voltage, Noise

360 μV

Voltage, Output

12 V

Voltage Regulator Type

Linear

Topology

LDO

Regulator Output Type

Fixed

Polarity Type

Positive

Number Of Outputs

Single

Input Voltage (min)

13.6V

Input Voltage (max)

26V

Output Voltage

12V

Output Current

1(Typ)A

Load Regulation

120mV

Line Regulation

120mV

Operating Temp Range

-40C to 125C

Operating Temperature Classification

Automotive

Dropout Voltage@current (typ)

0.5@1A/0.11@100mA

Pin Count

3 +Tab

Mounting

Through Hole

Quiescent Current (max)

15mA

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Limit (min)

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LM2940T-12.0
*LM2940T-12.0/NOPB
LM2940T-12.0

Current page: 1 of 20
Download datasheet (566Kb)

LM2940/LM2940C

1A Low Dropout Regulator

General Description

The LM2940/LM2940C positive voltage regulator features the

ability to source 1A of output current with a dropout voltage of

typically 0.5V and a maximum of 1V over the entire temper-

ature range. Furthermore, a quiescent current reduction cir-

cuit has been included which reduces the ground current

when the differential between the input voltage and the output

voltage exceeds approximately 3V. The quiescent current

with 1A of output current and an input-output differential of 5V

is therefore only 30 mA. Higher quiescent currents only exist

when the regulator is in the dropout mode (V

Designed also for vehicular applications, the LM2940/

LM2940C and all regulated circuitry are protected from re-

verse battery installations or 2-battery jumps. During line

transients, such as load dump when the input voltage can

momentarily exceed the specified maximum operating volt-

Typical Application

*Required if regulator is located far from power supply filter.

**C

the regulator. This capacitor must be rated over the same operating temperature range as the regulator and the ESR is critical; see curve.

Ordering Information

Range

≤

−40°C

≤

−40°C

≤

125°C

Temp

0°C

OUT

must be at least 22 μF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to

≤

LM2940CT-5.0

LM2940CS-5.0

LM2940SX-5.0 LM2940SX-8.0 LM2940SX-9.0

LM2940LD-5.0

LM2940S-5.0

LM2940T-5.0

LM2940CSX

LM2940LDX

-5.0

5.0

LM2940LD-8.0

LM2940T-8.0

LM2940S-8.0

LM2940LDX

-8.0

8.0

–

8822

LM2940CT-9.0

LM2940CS-9.0

LM2940LD-9.0

LM2940S-9.0

LM2940T-9.0

− V

LM2940CSX

LM2940LDX

OUT

-9.0

9.0

Output Voltage

≤

3V).

LM2940LD-10

LM2940SX-10

age, the regulator will automatically shut down to protect both

the internal circuits and the load. The LM2940/LM2940C can-

not be harmed by temporary mirror-image insertion. Familiar

regulator features such as short circuit and thermal overload

protection are also provided.

Features

■

LM2940T-10

LM2940S-10

LM2940LDX

Dropout voltage typically 0.5V @I

Output current in excess of 1A

Output voltage trimmed before assembly

Reverse battery protection

Internal short circuit current limit

Mirror image insertion protection

-10

–

Product Enhancement tested

882203

LM2940CT-12

LM2940CS-12

LM2940SX-12

LM2940LD-12

LM2940S-12

LM2940CSX

LM2940T-12

LM2940LDX

-12

LM2940CS-15

LM2940CT-15

LM2940LD-15

LM2940CSX

LM2940LDX

= 1A

-15

–

www.national.com

January 2007

Tape and

Package

1k Units

TO-220

TO-263

TO-220

TO-263

Units

Reel

4.5k

LLP

Related parts for LM2940T-12.0/NOPB

LM2940T-12.0/NOPB Summary of contents

Page 1

... January 2007 = 1A O 882203 Package 12 15 LM2940CT-12 LM2940CT-15 LM2940CS-12 LM2940CS-15 LM2940CSX LM2940CSX -12 -15 1k Units LM2940LD-12 LM2940LD-15 Tape and LM2940LDX LM2940LDX -12 -15 Tape and – LM2940T-12 – LM2940S-12 – LM2940SX-12 www.national.com TO-220 TO-263 LLP Reel LLP 4.5k Units Reel TO-220 TO-263 ...

Page 2

Temp Range 5.0 LM2940IMP-5.0 LM2940IMP-8.0 LM2940IMP-9.0 LM2940IMP-10 LM2940IMP-12 LM2940IMP-15 SOT-223 −40°C ≤ ≤ T LM2940IMPX LM2940IMPX A 85°C -5.0 Marking L53B L54B The physical size of the SOT-223 is too small to contain the full device part number. The package ...

Page 3

... Dropout Voltage 100 mA O SOT-223 (MP) (Note 1) LLP-8 (LD) ESD Susceptibility (Note 4) Operating Conditions 60V Input Voltage Temperature Range 45V LM2940T, LM2940S Internally Limited LM2940CT, LM2940CS 150°C LM2940IMP ≤ ≤ −65°C T +150°C LM2940J, LM2940WG J LM2940LD 260°C, 10s 235°C, 30s = T = 25° ...

Page 4

Output Voltage ( Parameter Conditions Short Circuit (Note 7) Current = 100Ω Maximum Line R O ≤ Transient LM2940, T 100 ms LM2940/883, T ≤ LM2940C 100Ω Reverse Polarity Input Voltage ...

Page 5

Output Voltage ( Parameter Conditions Dropout Voltage 100 mA O Short Circuit (Note 7) Current = 100Ω Maximum Line R O ≤ Transient T 100 ms LM2940 LM2940C = 100Ω Reverse Polarity ...

Page 6

Output Voltage ( Parameter Conditions Ripple Rejection f = 120 Hz rms I = 100 mA O LM2940 LM2940C kHz rms Long Term Stability ...

Page 7

Typical Performance Characteristics Dropout Voltage Output Voltage vs. Temperature Quiescent Current Dropout Voltage vs. Temperature 882213 Quiescent Current vs. Temperature 882215 Quiescent Current 882217 7 882214 882216 882218 www.national.com ...

Page 8

Line Transient Response Ripple Rejection Low Voltage Behavior www.national.com Load Transient Response 882219 Low Voltage Behavior 882221 Low Voltage Behavior 882226 8 882220 882225 882227 ...

Page 9

Low Voltage Behavior 882228 Low Voltage Behavior 882230 Output at Voltage Extremes 882232 Low Voltage Behavior Output at Voltage Extremes Output at Voltage Extremes 9 882229 882231 882233 www.national.com ...

Page 10

Output at Voltage Extremes Output at Voltage Extremes Peak Output Current www.national.com Output at Voltage Extremes 882234 Output Capacitor ESR 882236 Output Impedance 882208 10 882235 882206 882222 ...

Page 11

Maximum Power Dissipation (TO-220) 882223 Maximum Power Dissipation (TO-263) 882210 Maximum Power Dissipation (SOT-223) 11 882224 www.national.com ...

Page 12

Equivalent Schematic Diagram www.national.com 12 882201 ...

Page 13

Application Information EXTERNAL CAPACITORS The output capacitor is critical to maintaining regulator stabil- ity, and must meet the required conditions for both ESR (Equivalent Series Resistance) and minimum amount of ca- pacitance. MINIMUM CAPACITANCE: The minimum output capacitance required to ...

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LM2940T-12.0/NOPB datasheet
LM2940T-12.0/NOPB data sheet
LM2940T-12.0/NOPB pdf datasheet
LM2940T-12.0/NOPB component
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LM2940T-12.0/NOPB datasheet download

LM2940T-12.0/NOPB National Semiconductor, LM2940T-12.0/NOPB Datasheet

LM2940T-12.0/NOPB

Specifications of LM2940T-12.0/NOPB

Related parts for LM2940T-12.0/NOPB

LM2940T-12.0/NOPB Summary of contents

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