LM2940T-12.0 datasheet(4/35 Pages) TI

Part #	LM2940T-12.0

Description	Dropout Voltage Typically 0.5V @IO = 1A, Output Current in Excess of 1A

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LM2940-N, LM2940C

SNVS769I – MARCH 2000 – REVISED APRIL 2013

www.ti.com

Electrical Characteristics

VIN = VO + 5V, IO = 1A, CO = 22 μF, unless otherwise specified. Boldface limits apply over the entire operating

temperature range of the indicated device. All other specifications apply for TA = TJ = 25°C.

Output Voltage (VO)

5V

8V

Parameter

Conditions

Typ

LM2940-N

LM2940-

Typ

LM2940-N

LM2940-

Units

Limit(1)

N/883

Limit(1)

N/883

Limit(2)

Output Voltage

5 mA

≤ IO ≤ 1A

6.25V

≤ VIN ≤ 26V

9.4V

≤ VIN ≤ 26V

5.00

4.85/4.75

8.00

7.76/7.60

VMIN

5.15/5.25

8.24/8.40

VMAX

Line Regulation

VO + 2V ≤ VIN ≤ 26V,

20

50

40/50

20

80

50/80

mVMAX

IO = 5 mA

Load Regulation

50 mA

≤ IO ≤ 1A

LM2940-N, LM2940-N/883

35

50/80

50/100

55

80/130

mVMAX

LM2940C

35

50

55

80

Output Impedance

100 mADC and

20 mArms,

35

1000/1000

55

1000/1000

m

Ω

fO = 120 Hz

Quiescent Current

VO +2V ≤ VIN ≤ 26V,

IO = 5 mA

LM2940-N, LM2940-N/883

10

15/20

10

15/20

mAMAX

LM2940C

10

15

VIN = VO + 5V,

30

45/60

50/60

30

45/60

50/60

mAMAX

IO = 1A

Output Noise Voltage 10 Hz

− 100 kHz,

150

700/700

240

1000/1000

μVrms

IO = 5 mA

Ripple Rejection

fO = 120 Hz, 1 Vrms,

IO = 100 mA

LM2940-N

72

60/54

66

54/48

dBMIN

LM2940C

72

60

66

54

fO = 1 kHz, 1 Vrms,

60/50

54/48

dBMIN

IO = 5 mA

Long Term Stability

20

32

mV/

1000 Hr

Dropout Voltage

IO = 1A

0.5

0.8/1.0

0.7/1.0

0.5

0.8/1.0

0.7/1.0

VMAX

IO = 100 mA

110

150/200

110

150/200

mVMAX

Short Circuit

See (3)

1.9

1.6

1.5/1.3

1.9

1.6

1.6/1.3

AMIN

Current

Maximum Line

RO = 100Ω

Transient

LM2940-N, T

≤ 100 ms

75

60/60

75

60/60

VMIN

LM2940-N/883, T

≤ 20 ms

40/40

LM2940C, T

≤ 1 ms

55

45

55

45

Reverse Polarity

RO = 100Ω

DC Input Voltage

LM2940-N, LM2940-N/883

−30

−15/−15

−30

−15/−15

VMIN

LM2940C

−30

−15

−30

−15

(1)

All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device

(boldface type). All limits at TA = TJ = 25°C are 100% production tested. All limits at temperature extremes are specified via correlation

using standard Statistical Quality Control methods.

(2)

All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device

(boldface type). All limits are 100% production tested and are used to calculate Outgoing Quality Levels.

(3)

Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature.

4

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