MCT7800 查看數據表（PDF） - Motorola => Freescale

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MCT7800

THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS

Motorola => Freescale 

MCT7800

ELECTRICAL CHARACTERISTICS (Vin = 27 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)

MCT7818B

MCT7818C

Characteristics

Symbol Min

Typ

Max

Min

Typ

Max

Output Voltage (TJ = +25°C)

Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)

21 Vdc ≤ Vin ≤ 33 Vdc

22 Vdc ≤ Vin ≤ 33 Vdc

Line Regulation, TJ = +25°C (Note 2)

21 Vdc ≤ Vin ≤ 33 Vdc

24 Vdc ≤ Vin ≤ 30 Vdc

Load Regulation, TJ = +25°C (Note 2)

5.0 mA ≤ Vin ≤ 1.5 A

250 mA ≤ Vin ≤ 750 mA

Quiescent Current (TJ = +25°C)

Quiescent Current Change

21 Vdc ≤ Vin ≤ 33 Vdc

22 Vdc ≤ Vin ≤ 33 Vdc

5.0 mA ≤ IO ≤ 1.0 A

Ripple Rejection

22 Vdc ≤ Vin ≤ 32 Vdc, f = 120 Hz

Dropout Voltage (IO = 1.0 A, TJ = +25°C)

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

VO

17.3

18

18.7 17.3

18

18.7

VO

—

—

—

17.1

18

18.9

17.1

18

18.9

—

—

—

Regline

—

11

360

—

11

360

—

5.0

180

—

5.0

180

Regload

—

4.0

360

—

4.0

360

—

3.0

180

—

3.0

180

IB

—

5.5

8.0

—

5.5

8.0

∆IB

—

—

—

—

—

1.0

—

—

1.0

—

—

—

—

—

0.5

—

—

0.5

RR

—

59

—

—

59

—

ViI – VO

—

2.0

—

—

2.0

—

Vn

—

10

—

—

10

—

Output Resistance f = 1.0 kHz

Short Circuit Current Limit (TA = +25°C)

Vin = 35 Vdc

rO

—

19

—

—

19

—

ISC

—

0.2

—

—

0.2

—

Peak Output Current (TJ = +25°C)

Average Temperature Coefficient of Output Voltage

Imax

—

2.2

—

TCVO

—

–1.0

—

—

2.2

—

—

–1.0

—

Unit

Vdc

Vdc

mV

mV

mA

mA

dB

Vdc

µV/VO

mΩ

A

A

mV/°C

ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)

MCT7824B

MCT7824C

Characteristics

Symbol Min

Typ

Max

Min

Typ

Max Unit

Output Voltage (TJ = +25°C)

Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PO ≤15 W)

27 Vdc ≤ Vin ≤ 38 Vdc

28 Vdc ≤ Vin ≤ 38 Vdc

Line Regulation, TJ = +25°C (Note 2)

27 Vdc ≤ Vin ≤ 38 Vdc

30 Vdc ≤ Vin ≤ 36 Vdc

Load Regulation, TJ = +25°C (Note 2)

5.0 mA ≤ IO ≤ 1.5 A

250 mA ≤ IO ≤ 750 mA

Quiescent Current (TJ = +25°C)

Quiescent Current Change

27 Vdc ≤ Vin ≤ 38 Vdc

28 Vdc ≤ Vin ≤ 38 Vdc

5.0 mA ≤ IO ≤ 1.0 A

Ripple Rejection

28 Vdc ≤ Vin ≤ 38 Vdc, f = 120 Hz

Dropout Voltage (IO = 1.0 A, TJ = +25°C)

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

VO

23

24

25

23

24

25

Vdc

VO

Vdc

—

—

—

22.8

24

25.2

22.8

24

25.2

—

—

—

Regline

—

12

480

—

mV

12

480

—

6.0

240

—

6.0

240

Regload

mV

—

5.0

480

—

5.0

480

—

4.0

240

—

4.0

240

IB

—

5.5

8.0

—

5.5

8.0

mA

∆IB

mA

—

—

—

—

—

1.0

—

—

1.0

—

—

—

—

—

0.5

—

—

0.5

RR

dB

—

56

—

—

56

—

VI – VO

—

2.0

—

—

2.0

—

Vdc

Vn

µV/VO

—

10

—

—

10

—

Output Resistance f = 1.0 kHz

rO

—

20

—

—

20

—

mΩ

Short Circuit Current Limit (TA = +25°C)

Vin = 35 Vdc

ISC

A

—

0.2

—

—

0.2

—

Peak Output Current (TJ = +25°C)

Imax

—

2.2

—

—

2.2

—

A

Average Temperature Coefficient of Output Voltage

TCVO

—

–1.5

—

—

–1.5

— mV/°C

NOTES: 1. Tlow = 0°C for MCT78XXC

= – 40°C for MCT78XXB

Thigh = +125°C for MCT78XXB, C. When the junction temperature exceeds +125°C, internal current limiting

will reduce the output current to less than 1.0 A at a VI–VO of 15 V or

greater. The MC7800 die will supply more current under the same conditions.

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.

MOTOROLA

MCT7800

7

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