601-00506 Parallax Inc, 601-00506 Datasheet

601-00506

Manufacturer Part Number

601-00506

Description

IC LDO REG 5V 1A TO-220

Manufacturer

Parallax Inc

Datasheet

1.601-00506.pdf (19 pages)

Specifications of 601-00506

Regulator Topology

Positive Fixed

Voltage - Output

Voltage - Input

Up to 26V

Voltage - Dropout (typical)

0.5V @ 1A

Number Of Regulators

Current - Output

Operating Temperature

0°C ~ 125°C

Mounting Type

Through Hole

Package / Case

TO-220

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Limit (min)

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Current page: 1 of 19
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0˚C ≤ T

−40˚C ≤ T

125˚C

−40˚C ≤ T

125˚C

−40˚C ≤ T

85˚C

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 temperature range. Furthermore, a quiescent current

reduction circuit has been included which reduces the

ground current when the differential between the input volt-

age 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

Typical Application

to 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

Required if regulator is located far from power supply filter.

Temperature

OUT

Marking

Range

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

≤ 125˚C

≤

LM2940CT-5.0

LM2940CS-5.0

LM2940CSX-5.0

LM2940LD-5.0

LM2940LDX-5.0

LM2940T-5.0

LM2940S-5.0

LM2940SX-5.0

LM2940IMP-5.0

LM2940IMPX-5.0 LM2940IMPX-8.0 LM2940IMPX-9.0 LM2940IMPX-10 LM2940IMPX-12 LM2940IMPX-15

− V

L53B

5.0

OUT

≤ 3V).

LM2940T-8.0

LM2940S-8.0

LM2940SX-8.0

LM2940IMP-8.0

LM2940LDX-8.0 LM2940LDX-9.0

LM2940LD-8.0

L54B

8.0

DS008822

LM2940CT-9.0

LM2940CS-9.0

LM2940CSX-9.0

LM2940LD-9.0

LM2940T-9.0

LM2940S-9.0

LM2940SX-9.0

LM2940IMP-9.0

L0EB

9.0

Output Voltage

momentarily exceed the specified maximum operating volt-

age, the regulator will automatically shut down to protect

both the internal circuits and the load. The LM2940/

LM2940C cannot be harmed by temporary mirror-image in-

sertion. Familiar regulator features such as short circuit and

thermal overload protection are also provided.

Features

n Dropout voltage typically 0.5V

n Output current in excess of 1A

n Output voltage trimmed before assembly

n Reverse battery protection

n Internal short circuit current limit

n Mirror image insertion protection

n P

LM2940T-10

LM2940S-10

LM2940SX-10

LM2940IMP-10

LM2940LDX-10 LM2940LDX-12

LM2940LD-10

Product Enhancement tested

L55B

00882203

LM2940CT-12

LM2940CS-12

LM2940CSX-12

LM2940LD-12

LM2940T-12

LM2940S-12

LM2940SX-12

LM2940IMP-12

L56B

LM2940CT-15

LM2940CS-15

LM2940CSX-15

LM2940LD-15

LM2940LDX-15

LM2940IMP-15

= 1A

L70B

February 2006

www.national.com

TO-220

TO-263

LLP

1k Units

Tape and

Reel

LLP

4.5k Units

Tape and

Reel

TO-220

TO-263

SOT-223

in Tape

and Reel

Package

Related parts for 601-00506

601-00506 Summary of contents

Page 1

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 temperature range. Furthermore, a ...

Page 2

Ordering Information The physical size of the SOT-223 is too small to contain the full device part number. The package markings indicated are what will appear on the actual device. Temperature Range 5.0 −55˚C ≤ T ≤ 125˚C LM2940J-5.0/883 J ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. LM2940S ≤ 100 ms LM2940CS, T ≤ Internal Power Dissipation (Note 2) Maximum ...

Page 4

Electrical Characteristics 5V 1A µF, unless otherwise specified. Boldface limits apply over the entire operating tempera ture range of the indicated device. All other specifications apply for ...

Page 5

Electrical Characteristics 5V 1A µF, unless otherwise specified. Boldface limits apply over the entire operating tempera ture range of the indicated device. All other specifications apply for ...

Page 6

Electrical Characteristics 5V 1A µF, unless otherwise specified. Boldface limits apply over the entire operating tempera ture range of the indicated device. All other specifications apply for ...

Page 7

Typical Performance Characteristics Dropout Voltage Output Voltage vs. Temperature Quiescent Current Dropout Voltage vs. Temperature 00882213 Quiescent Current vs. Temperature 00882215 00882217 7 00882214 00882216 Quiescent Current 00882218 www.national.com ...

Page 8

Typical Performance Characteristics Line Transient Response Ripple Rejection Low Voltage Behavior www.national.com (Continued) Load Transient Response 00882219 Low Voltage Behavior 00882221 Low Voltage Behavior 00882226 8 00882220 00882225 00882227 ...

Page 9

Typical Performance Characteristics Low Voltage Behavior Low Voltage Behavior Output at Voltage Extremes (Continued) Low Voltage Behavior 00882228 Output at Voltage Extremes 00882230 Output at Voltage Extremes 00882232 9 00882229 00882231 00882233 www.national.com ...

Page 10

Typical Performance Characteristics Output at Voltage Extremes Output at Voltage Extremes Peak Output Current www.national.com (Continued) Output at Voltage Extremes 00882234 Output Capacitor ESR 00882236 00882208 10 00882235 00882206 Output Impedance 00882222 ...

Page 11

Typical Performance Characteristics Maximum Power Dissipation (TO-220) Maximum Power Dissipation (TO-263) See (Note 2) (Continued) Maximum Power Dissipation (TO-3) 00882223 00882210 11 00882224 www.national.com ...

Page 12

Equivalent Schematic Diagram www.national.com 12 00882201 ...

Page 13

Application Hints EXTERNAL CAPACITORS The output capacitor is critical to maintaining regulator sta- bility, 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 ...

Page 14

Application Hints (Continued) When a value for θ is found using the equation shown, (H−A) a heatsink must be selected that has a value that is less than or equal to this number. θ is specified numerically by the heatsink ...

Page 15

Application Hints (Continued) FIGURE 6. Maximum Power Dissipation vs. T 00882241 for the SOT-223 Package AMB 15 www.national.com ...

Page 16

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 3-Lead SOT-223 Package NS Package Number MP04A 16 Lead Dual-in-Line Package (J) See NS Package Number J16A 16 ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16 Lead Surface Mount Package (WG) See NS Package Number WG16A 3-Lead TO-220 Plastic Package (T) NS Package Number TO3B 17 www.national.com ...

Page 18

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) 3-Lead TO-263 Surface Mount Package (MP) NS Package Number TS3B 8-Lead LLP Order Number LM2940LD-5.0, LM2940LD-8.0, LM2940LD-9.0, LM2940LD-10, LM2940LD-12 or LM2940LD-15 NS Package Number LDC08A 18 ...

Page 19

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information ...

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