Datasheet LM340T, LM340AT Datasheet (Motorola)

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Page 1

 



SEMICONDUCTOR

TECHNICAL DATA

THREE–TERMINAL

POSITIVE FIXED

VOLTAGE REGULATORS

Order this document by LM340/D

Pin 1. Input

2. Ground

3. Output

T SUFFIX

PLASTIC PACKAGE

CASE 221A

Heatsink surface is connected to Pin 2.

Simplified Application

A common ground is required between the input and the output voltages. The input voltage must remain typically 1.7 V above the output voltage even during the low point on the input ripple voltage.

XX these two digits of the type number indicate

voltage.

*Cin is required if regulator is located an

appreciable distance from power supply filter.

** CO is not needed for stability; however, it does

improve transient response. If needed, use a

0.1 µF ceramic disc.

LM340–XX

Input

Cin*

0.33

CO**

Output

MOTOROLA ANALOG IC DEVICE DATA

    

This family of fixed voltage regulators are monolithic integrated circuits capable of driving loads in excess of 1.0 A. These three–terminal regulators employ internal current limiting, thermal shutdown, and safe–area compensation. Devices are available with improved specifications, including a 2% output voltage tolerance, on A–suffix 5.0, 12 and 15 V device types.

Although designed primarily as a fixed voltage regulator, these devices can be used with external components to obtain adjustable voltages and currents. This series of devices can be used with a series–pass transistor to boost output current capability at the nominal output voltage.

• Output Current in Excess of 1.0 A

• No External Components Required

• Output Voltage Offered in 2% and 4% Tolerance*

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe–Area Compensation

ORDERING INFORMATION

Device

Output Voltage

and Tolerance

Operating

Temperature Range

Package

LM340T–5.0 5.0 V ± 4% LM340A T–5.0 5.0 V ± 2% LM340T–6.0 6.0 V ± 4% LM340T–8.0 8.0 V ± 4% LM340T–12 12 V ± 4%

LM340A T–12 12 V ± 2%

= 0° to +

125°C

Plastic P

ower

LM340T–15 15 V ± 4% LM340A T–15 15 V ± 2% LM340T–18 18 V ± 4% LM340T–24 24 V ± 4%

* 2% regulators are available in 5, 12 and 15 V devices.

 Motorola, Inc. 1996 Rev 1

Page 2

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

(TA = +25°C unless otherwise noted.)

Rating Symbol Value Unit

Input Voltage (5.0 V – 18 V)

Input Voltage (24 V)

35 40

Vdc

Power Dissipation and Thermal Characteristics

Plastic Package

TA = +25°C Derate above TA = +25°C Thermal Resistance, Junction–to–Air

TC= +25°C Derate above TC = +75°C (See Figure 1) Thermal Resistance, Junction–to–Case

θJA

Internally Limited

15.4 65

Internally Limited

200

5.0

mW/°C

°C/W

mW/°C

°C/W

Storage Temperature Range T

stg

–65 to +150 °C

Operating Junction Temperature Range T

0 to +150 °C

Representative Schematic Diagram

1.0k 210

Input

16k

6.7V

300

1.0k

100

200

3.6k

6.4k

520

3.0k

5.6k

10pF

300

0.12

Output

200

2.6k

6.0k

40 pF

Gnd

2.8k

3.9k2.0k

6.0k

1.0k

Page 3

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340–5.0 ELECTRICAL CHARACTERISTICS

(Vin = 10 V, IO = 500 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

4.8 5.0 5.2 Vdc

Line Regulation (Note 2)

8.0 Vdc to 20 Vdc

7.0 Vdc to 25 Vdc (TJ = +25°C)

8.0 Vdc to 12 Vdc, IO = 1.0 A

7.3 Vdc to 20 Vdc, IO = 1.0 A (TJ = +25°C)

Reg

line

– – – –

50 50 25 50

Load Regulation (Note 2)

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

50 50 25

Output Voltage

7.0 ≤ Vin ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

4.75 – 5.25 Vdc

Quiescent Current

IO = 1.0 A TJ = +25°C

– –

–

4.0

8.5

8.0

Quiescent Current Change

7.0 ≤ Vin ≤ 25 Vdc, IO = 500 mA

5.0 mA ≤ IO ≤ 1.0 A, Vin = 10 V

7.5 ≤ Vin ≤ 20 Vdc, IO = 1.0 A

∆I

– – –

1.0

0.5

1.0

Ripple Rejection

IO = 1.0 A (TJ = +25°C)

RR 62 80 – dB

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 2.0 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 40 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±0.6 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C)

IO = 1.0 A

7.3 – – Vdc

NOTES: 1. T

low

to T

high

= 0° to +125°C

2.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used.

DEFINITIONS

Line Regulation – The change in output voltage for a

change in the input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average chip temperature is not significantly affected.

Load Regulation – The change in output voltage for a change in load current at constant chip temperature.

Maximum Power Dissipation – The maximum total device dissipation for which the regulator will operate within specifications.

Quiescent Current – That part of the input current that is not delivered to the load.

Output Noise Voltage – The rms AC voltage at the output, with constant load and no input ripple, measured over a specified frequency range.

Page 4

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340A–5.0 ELECTRICAL CHARACTERISTICS

(Vin = 10 V, IO = 1.0 A, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

4.9 5.0 5.1 Vdc

Line Regulation

7.5 Vdc to 20 Vdc, IO = 500 mA

7.3 Vdc to 25 Vdc (TJ = +25°C)

8.0 Vdc to 12 Vdc

8.0 Vdc to 12 Vdc (TJ = +25°C)

Reg

line

– – – –

–

3.0 – –

10 10 12

4.0

Load Regulation

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

25 25 15

Output Voltage

7.5 ≤ Vin ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

4.8 – 5.2 Vdc

Quiescent Current

TJ = +25°C

– –

–

3.5

6.5

6.0

Quiescent Current Change

5.0 mA ≤ IO ≤ 1.0 A, Vin = 10 V

8.0 ≤ Vin ≤ 25 Vdc, IO = 500 mA

7.5 ≤ Vin ≤ 20 Vdc, IO = 1.0 A (TJ = +25°C)

∆I

– – –

0.5

0.8

Ripple Rejection

8.0 ≤ Vin ≤ 18 Vdc, f = 120 Hz IO = 500 mA IO = 1.0 A (TJ = +25°C)

68 68

–

– –

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 2.0 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 40 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±0.6 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C)

IO = 1.0 A

7.3 – – Vdc

NOTE: 1. T

low

to T

high

= 0° to +125°C

Page 5

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340–6.0 ELECTRICAL CHARACTERISTICS

(Vin = 11 V, IO = 500 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

5.75 6.0 6.25 Vdc

Line Regulation

9.0 Vdc to 21 Vdc

8.0 Vdc to 25 Vdc (TJ = +25°C)

9.0 Vdc to 13 Vdc, IO = 1.0 A

8.3 Vdc to 21 Vdc, IO = 1.0 A (TJ = +25°C)

Reg

line

– – – –

60 60 30 60

Load Regulation

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C)

250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

60 60 30

Output Voltage

8.0 ≤ Vin ≤ 21 Vdc, 6.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

5.7 – 6.3 Vdc

Quiescent Current

IO = 1.0 A TJ = +25°C

– –

–

4.0

8.5

8.0

Quiescent Current Change

8.0 ≤ Vin ≤ 25 Vdc, IO = 500 mA

5.0 mA ≤ IO ≤ 1.0 A, Vin = 11 V

8.6 ≤ Vin ≤ 21 Vdc, IO = 1.0 A

∆I

– – –

1.0

0.5

1.0

Ripple Rejection

IO = 1.0 A (TJ = +25°C)

RR 59 78 – dB

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 1.9 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 45 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±0.7 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C)

IO = 1.0 A

8.3 – – Vdc

NOTE: 1. T

low

to T

high

= 0° to +125°C

Page 6

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340–8.0 ELECTRICAL CHARACTERISTICS

(Vin = 14 V, IO = 500 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

7.7 8.0 8.3 Vdc

Line Regulation

11 Vdc to 23 Vdc

10.5 Vdc to 25 Vdc (TJ = +25°C)

11 Vdc to 17 Vdc, IO = 1.0 A

10.5 Vdc to 23 Vdc, IO = 1.0 A (TJ = +25°C)

Reg

line

– – – –

80 80 40 80

Load Regulation

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C)

250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

80 80 40

Output Voltage

10.5 ≤ Vin ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

7.6 – 8.4 Vdc

Quiescent Current

IO = 1.0 A TJ = +25°C

– –

–

4.0

8.5

8.0

Quiescent Current Change

10.5 ≤ Vin ≤ 25 Vdc, IO = 500 mA

5.0 mA ≤ IO ≤ 1.0 A, Vin = 14 V

10.6 ≤ Vin ≤ 23 Vdc, IO = 1.0 A

∆I

– – –

1.0

0.5

1.0

Ripple Rejection

IO = 1.0 A (TJ = +25°C)

RR 56 76 – dB

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 1.5 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 52 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±1.0 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C)

IO = 1.0 A

10.5 – – Vdc

NOTE: 1. T

low

to T

high

= 0° to +125°C

Page 7

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340–12 ELECTRICAL CHARACTERISTICS

(Vin = 19 V, IO = 500 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

11.5 12 12.5 Vdc

Line Regulation (Note 2)

15 Vdc to 27 Vdc

14.6 Vdc to 30 Vdc (TJ = +25°C)

16 Vdc to 22 Vdc, IO = 1.0 A

14.6 Vdc to 27 Vdc, IO = 1.0 A (TJ = +25°C)

Reg

line

– – – –

120 120

120

Load Regulation (Note 2)

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C)

250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

120 120

Output Voltage

14.5 ≤ Vin ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

11.4 – 12.6 Vdc

Quiescent Current

IO = 1.0 A TJ = +25°C

– –

–

4.0

8.5

8.0

Quiescent Current Change

14.5 ≤ Vin ≤ 30 Vdc, IO = 500 mA

5.0 mA ≤ IO ≤ 1.0 A, Vin = 19 V

14.8 ≤ Vin ≤ 27 Vdc, IO = 1.0 A

∆I

– – –

1.0

0.5

1.0

Ripple Rejection

IO = 1.0 A (TJ = +25°C)

RR 55 72 – dB

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 1.1 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 75 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±1.5 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C)

IO = 1.0 A

14.6 – – Vdc

NOTES: 1. T

low

to T

high

= 0° to +125°C

2.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used.

Page 8

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340A–12 ELECTRICAL CHARACTERISTICS

(Vin = 19 V, IO = 1.0 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

11.75 12 12.25 Vdc

Line Regulation

14.8 Vdc to 27 Vdc, IO = 500 mA

14.5 Vdc to 30 Vdc (TJ = +25°C) 16 Vdc to 22 Vdc 16 Vdc to 22 Vdc (TJ = +25°C)

Reg

line

– – – –

–

4.0 – –

18 18 30

9.0

Load Regulation

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

60 32 19

Output Voltage

14.8 ≤ Vin ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

11.5 – 12.5 Vdc

Quiescent Current

TJ = +25°C

– –

–

3.5

6.5

6.0

Quiescent Current Change

5.0 mA ≤ IO ≤ 1.0 A, Vin = 19 V 15 ≤ Vin ≤ 30 Vdc, IO = 500 mA

14.8 ≤ Vin ≤ 27 Vdc, IO = 1.0 A(TJ = +25°C)

∆I

– – –

0.5

0.8

Ripple Rejection

15 ≤ Vin ≤ 25 Vdc, f = 120 Hz

IO = 500 mA IO = 1.0 A (TJ = +25°C)

61 61

–

– –

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 1.1 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 75 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±1.5 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C) 14.5 – – Vdc

NOTE: 1. T

low

to T

high

= 0° to +125°C

Page 9

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340–15 ELECTRICAL CHARACTERISTICS

(Vin = 23 V, IO = 500 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

14.4 15 15.6 Vdc

Line Regulation (Note 2)

18.5 Vdc to 30 Vdc

17.5 Vdc to 30 Vdc (TJ = +25°C) 20 Vdc to 26 Vdc, IO = 1.0 A

17.7 Vdc to 30 Vdc, IO = 1.0 A (TJ = +25°C)

Reg

line

– – – –

150 150

150

Load Regulation (Note 2)

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

150 150

Output Voltage

17.5 ≤ Vin ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

14.25 – 15.75 Vdc

Quiescent Current

IO = 1.0 A TJ = +25°C

– –

–

4.0

8.5

8.0

Quiescent Current Change

17.5 ≤ Vin ≤ 30 Vdc, IO = 500 mA

5.0 mA ≤ IO ≤ 1.0 A, Vin = 23 V

17.9 ≤ Vin ≤ 30 Vdc, IO = 1.0 A

∆I

– – –

1.0

0.5

1.0

Ripple Rejection

IO = 1.0 mA (TJ = +25°C)

RR 54 70 – dB

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 800 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 90 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±1.8 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C)

IO = 1.0 A

17.7 – – Vdc

NOTES: 1. T

low

to T

high

= 0° to +125°C

2.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used.

Page 10

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340A–15 ELECTRICAL CHARACTERISTICS

(Vin = 23 V, IO = 1.0 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

14.7 15 15.3 Vdc

Line Regulation

17.9 Vdc to 30 Vdc, IO = 500 mA

17.5 Vdc to 30 Vdc (TJ = +25°C) 20 Vdc to 26 Vdc, IO = 1.0 A 20 Vdc to 26 Vdc, IO = 1.0 A (TJ = +25°C)

Reg

line

– – – –

–

4.0 – –

22 22 30 10

Load Regulation

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C) 250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

–

75 35 21

Output Voltage

17.9 ≤ Vin ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

14.4 – 15.6 Vdc

Quiescent Current

TJ = +25°C

– –

–

3.5

6.5

6.0

Quiescent Current Change

5.0 mA ≤ IO ≤ 1.0 A, Vin = 23 V

17.9 ≤ Vin ≤ 30 Vdc, IO = 500 mA

17.9 ≤ Vin ≤ 30 Vdc, IO = 1.0 A (TJ = +25°C)

∆I

– – –

0.5

0.8

Ripple Rejection

18.5 ≤ Vin ≤ 28.5 Vdc, f = 120 Hz IO = 500 mA IO = 1.0 A (TJ = +25°C)

60 60

–

– –

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 800 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 90 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±1.8 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C) 17.5 – – Vdc

NOTE: 1. T

low

to T

high

= 0° to +125°C

Page 11

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340–18 ELECTRICAL CHARACTERISTICS

(Vin = 27 V, IO = 500 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

17.3 18 18.7 Vdc

Line Regulation

21.5 Vdc to 33 Vdc

21 Vdc to 33 Vdc (TJ = +25°C) 24 Vdc to 30 Vdc, IO = 1.0 A 21 Vdc to 33 Vdc, IO = 1.0 A (TJ = +25°C)

Reg

line

– – – –

180 180

180

Load Regulation

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C)

250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

180 180

Output Voltage

21 ≤ Vin ≤ 33 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

17.1 – 18.9 Vdc

Quiescent Current

IO = 1.0 A TJ = +25°C

– –

–

4.0

8.5

8.0

Quiescent Current Change

21 ≤ Vin ≤ 33 Vdc, IO = 500 mA

5.0 mA ≤ IO ≤ 1.0 A, Vin = 27 V

21 ≤ Vin ≤ 33 Vdc, IO = 1.0 A

∆I

– – –

1.0

0.5

1.0

Ripple Rejection

IO = 1.0 mA (TJ = +25°C)

RR 53 69 – dB

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 500 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 110 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA

TCV

– ±2.3 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C)

IO = 1.0 A

21 – – Vdc

NOTE: 1. T

low

to T

high

= 0° to +125°C

Page 12

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

LM340–24 ELECTRICAL CHARACTERISTICS

(Vin = 33 V, IO = 500 mA, TJ = T

low

to T

high

[Note 1], unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Output Voltage (TJ = +25°C)

IO = 5.0 mA to 1.0 A

23 24 25 Vdc

Line Regulation

28 Vdc to 38 Vdc 27 Vdc to 38 Vdc (TJ = +25°C) 30 Vdc to 36 Vdc, IO = 1.0 A

27.1 Vdc to 38 Vdc, IO = 1.0 A (TJ = +25°C)

Reg

line

– – – –

240 240 120 240

Load Regulation

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A (TJ = +25°C)

250 mA ≤ IO ≤ 750 mA (TJ = +25°C)

Reg

load

– – –

240 240 120

Output Voltage

27 ≤ Vin ≤ 38 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W

22.8 – 25.2 Vdc

Quiescent Current

IO = 1.0 A TJ = +25°C

– –

–

4.0

8.5

8.0

Quiescent Current Change

27 ≤ Vin ≤ 38 Vdc, IO = 500 mA

5.0 mA ≤ IO ≤ 1.0 A, Vin = 33 V

27.3 ≤ Vin ≤ 38 Vdc, IO = 1.0 A

∆I

– – –

1.0

0.5

1.0

Ripple Rejection

IO = 1.0 mA (TJ = +25°C)

RR 50 66 – dB

Dropout Voltage VI – V

– 1.7 – Vdc

Output Resistance (f = 1.0 kHz) r

– 2.0 – mΩ

Short Circuit Current Limit (TJ = +25°C) I

– 200 – A

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

– 170 – µV

Average Temperature Coefficient of Output Voltage

IO = 5.0 m

TCV

– ±3.0 – mV/°C

Peak Output Current (TJ = +25°C) I

– 2.4 – A

Input Voltage to Maintain Line Regulation (TJ = +25°C)

IO = 1.0 A

27.1 – – Vdc

NOTE: 1. T

low

to T

high

= 0° to +125°C

Page 13

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

VOL TAGE REGULATOR PERFORMANCE

The performance of a voltage regulator is specified by its immunity to changes in load, input voltage, power dissipation, and temperature. Line and load regulation are tested with a pulse of short duration (< 100 µs) and are strictly a function of electrical gain. However, pulse widths of longer duration (> 1.0 ms) are sufficient to affect temperature gradients across the die. These temperature gradients can cause a change in the output voltage, in addition to changes caused by line and load regulation. Longer pulse widths and thermal gradients make it desirable to specify thermal regulation.

Thermal regulation is defined as the change in output voltage caused by a change in dissipated power for a specified time, and is expressed as a percentage output voltage change per watt. The change in dissipated power can

be caused by a change in either input voltage or the load current. Thermal regulation is a function of IC layout and die attach techniques, and usually occurs within 10 ms of a change in power dissipation. After 10 ms, additional changes in the output voltage are due to the temperature coefficient of the device.

Figure 1 shows the line and thermal regulation response of a typical LM340AT–5.0 to a 10 W input pulse. The variation of the output voltage due to line regulation is labeled À and the thermal regulation component is labeled Á. Figure 2 shows the load and thermal regulation response of a typical LM340AT–5.0 to a 15 W load pulse. The output voltage variation due to load regulation is labeled À and the thermal regulation component is labeled Á.

out

, OUTPUT

∆

out

, OUTPUT

out

, OUTPUT

∆

, INPUT

out

= 5.0 V Vin = 7.5 V I

out

= 1.0 A CO = 0 TJ = 25

Vin – V

out

= 5.0 V

out

= 100 mA

Figure 1. Line and Thermal Regulation Figure 2. Load and Thermal Regulation

LM340A T–5.0 V

out

= 5.0 V Vin = 15 V I

out

= 0 A

→

1.5 A → 0 A

= Reg

line

= 4.4 mV

t, TIME (2.0 ms/DIV)

CURRENT (A) VOL TAGE DEVIATION (V)

(2.0 mV/DIV)

1 2

2.0

LM340A T–5.0 V

out

= 5.0 V

Vin = 8.0 V

→

18 V → 8.0 V

out

= 1.0 A

= Reg

line

= 2.4 mV

t, TIME (2.0 ms/DIV)

VOLTAGE (V)

VOLTAGE DEVIATION (V)

(2.0 mV/DIV)

1 2

18 V

8.0 V

Figure 3. Temperature Stability Figure 4. Output Impedance

1.02

1.00

0.98 –90 –50 –10 30 70 110 150 190

TJ, JUNCTION TEMPERATURE (

NORMALIZED OUTPUT VOLTAGE

–1

–2

–3

–4

1.0 10 100 1.0 k 10 k 100 k 1.0 M 10 M 100 M f, FREQUENCY (Hz)

1.01

0.99

= Reg

therm

= 0.0030% VO/W = Reg

therm

= 0.0020% VO/W

Ω

, OUTPUT IMPEDANCE ( )

Page 14

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

out

, OUTPUT CURRENT (A)

–V

out

, INPUT–OUTPUT VOLTAGE

DIFFERENTIAL (V)

, QUIESCENT CURRENT (mA)

out

= 5.0 V Vin = 10 V Vin = 10 V CO = 0 f = 120 Hz TJ = 25

out

= 1.5 A

out

= 5.0 V Vin = 10 V CO = 0 TJ = 25

Figure 5. Ripple Rejection versus Frequency Figure 6. Ripple Rejection versus Output Current

Figure 7. Quiescent Current versus

Input Voltage

Figure 8. Quiescent Current versus

Output Current

Figure 9. Dropout Voltage Figure 10. Peak Output Current

100

1.0 10 100 1.0 k 10 k 100 k 1.0 M 10 M 100 M f, FREQUENCY (Hz)

RR, RIPPLE REJECTION (dB)

out

= 50 mA

4.0

3.0

2.0

1.0

010 203040

, INPUT VOLTAGE (Vdc)

5.0

4.0

3.0

2.0

1.0

0.01 0.1 1.0 10 I

out

, OUTPUT CURRENT (A)

100

40 30

0.01 0.1 1.0 10 I

out

, OUTPUT CURRENT (A)

RR, RIPPLE REJECTION (dB)

TJ = 25°C

out

= 5.0 V

out

= 1.0 A

TJ = 25°C Vin – V

out

= 5.0 V

2.5

2.0

1.5

1.0

0.5

–75 –50 –25 0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (

∆

out

= 100 mV

IO = 1.0 A

IO = 500 mA

IO = 10 mA

4.0

3.0

2.0

1.0

0 10203040

in–Vout

, INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V)

TJ = 25°C

Page 15

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

out

, OUTPUT VOL TAGE

∆

DEVIATION (V)

out

, OUTPUT

out

, OUTPUT VOL TAGE

∆

DEVIATION (V)

, INPUT VOLTAGE

∆

CHANGE (V)

–0.1

Figure 11. Line Transient Response Figure 12. Load Transient Response

Figure 13. Worst Case Power Dissipation

versus Ambient Temperature (Case 221A)

010203040

0.8

0.6

0.4

0.2 0

–0.2 –0.4 –0.6

1.0

0.5 0

t, TIME (

out

= 5.0 V

out

= 150 mA CO = 0 TJ = 25

1.0

CURRENT (A)

010203040

t, TIME (

out

= 5.0 V Vin = 10 V CO = 0 TJ = 25

0.3

0.2

0.1 0

–0.2 –0.3

1.5

0.5 0

8.0

4.0

–50 –25 0 25 50 75 100 125 150

TA, AMBIENT TEMPERATURE (

, POWER DISSIPATION (W)

θJC = 5°C/W θJA = 65°C/W

J(max)

= 150

θHS = 0°C/W

θHS = 5°C/W

θHS = 15°C/W

No Heatsink

Page 16

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

APPLICATIONS INFORMATION

Design Considerations

The LM340, A series of fixed voltage regulators are designed with Thermal Overload Protection that shuts down the circuit when subjected to an excessive power overload condition, Internal Short Circuit Protection that limits the maximum current the circuit will pass, and Output Transistor Safe–Area Compensation that reduces the output short circuit current as the voltage across the pass transistor is increased.

In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the

regulator is connected to the power supply filter with long wire lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high–frequency characteristics to insure stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead.

Figure 14. Current Regulator Figure 15. Adjustable Output Regulator

Figure 16. Current Boost Regulator Figure 17. Short Circuit Protection

5.0 V R

Input

0.33

LM340–5.0

These regulators can also be used as a current source when connected as above. In order to minimize dissipation the LM340–5.0 is chosen in this application. Resistor R determines the current as follows:

IO =

+ I

1.5 mA over line and load changes

For example, a 1 A current source would require R to be a 5

Ω

, 10 W resistor and the output voltage compliance would be the input voltage less 7.0 V.

Constant

Current to

Grounded Load

Input

Output

–

0.1µF

10k

MC1741G

out

, 7.0 V to 20 V

Vin – VO

≥

2.0 V

The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. The minimum voltage obtainable with this arrangement is 2.0 V greater than the regulator voltage.

0.33µF

0.1

Output

1.0µF

The LM340, A series can be current boosted with a PNP transistor. The MJ2955 provides current to 5.0 A. Resistor R in conjuction with the V

of the PNP determines when the pass transistor begins conducting; this circuit is not short circuit proof. Input–output differential voltage minimum is increased by VBE of the pass transistor.

MJ2955 or Equiv

LM340

Input R

MJ2955

or Equiv.

Output

2N6049

or Equiv.

1.0

The circuit of Figure 17 can be modified to provide supply protection against short circuits by adding a short circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP must be able to handle the short circuit current of the three–terminal regulator. Therefore, 4.0 A plastic power transistor is specified.

LM340–5.0

Input

Page 17

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

OUTLINE DIMENSIONS

T SUFFIX

PLASTIC PACKAGE

CASE 221A–06

ISSUE Y

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION Z DEFINES A ZONE WHERE ALL BODY AND LEAD IRREGULARITIES ARE ALLOWED.

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.570 0.620 14.48 15.75 B 0.380 0.405 9.66 10.28 C 0.160 0.190 4.07 4.82 D 0.025 0.035 0.64 0.88 F 0.142 0.147 3.61 3.73 G 0.095 0.105 2.42 2.66 H 0.110 0.155 2.80 3.93 J 0.018 0.025 0.46 0.64 K 0.500 0.562 12.70 14.27 L 0.045 0.060 1.15 1.52 N 0.190 0.210 4.83 5.33 Q 0.100 0.120 2.54 3.04 R 0.080 0.110 2.04 2.79 S 0.045 0.055 1.15 1.39 T 0.235 0.255 5.97 6.47 U 0.000 0.050 0.00 1.27 V 0.045 ––– 1.15 ––– Z ––– 0.080 ––– 2.04

123

SEATING PLANE

–T–

Page 18

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

NOTES

Page 19

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

NOTES

Page 20

LM340, A Series

MOTOROLA ANALOG IC DEVICE DATA

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.

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LM340/D

*LM340/D*

◊