MC78T08CT 查看數據表（PDF） - Motorola => Freescale

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MC78T08CT

THREE-AMPERE POSITIVE FIXED VOLTAGE REGULATORS

Motorola => Freescale 

MC78T00 Series

ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 3.0 A, 0°C ≤ TJ ≤ 125°C, PO ≤ Pmax [Note 1], unless otherwise noted.)

MC78T05AC

MC78T05C

Characteristics

Symbol Min

Typ

Max

Min

Typ

Max

Unit

Output Voltage

(5.0 mA ≤ IO ≤ 3.0 A, TJ = +25°C)

(5.0 mA ≤ IO ≤ 3.0 A;

5.0 mA ≤ IO ≤ 2.0 A, 7.3 Vdc ≤ Vin ≤ 20 Vdc)

VO

Vdc

4.9

5.0

5.1

4.8

5.0

5.2

4.8

5.0

5.2

4.75

5.0

5.25

Line Regulation (Note 2)

Regline

–

3.0

25

–

3.0

25

mV

(7.2 Vdc ≤ Vin ≤ 35 Vdc, IO = 5.0 mA, TJ = +25°C;

7.2 Vdc ≤ Vin ≤ 35 Vdc, IO = 1.0 A, TJ = +25°C;

8.0 Vdc ≤ Vin ≤ 12 Vdc, IO = 3.0 A, TJ = +25°C;

7.5 Vdc ≤ Vin ≤ 20 Vdc, IO = 1.0 A)

Load Regulation (Note 2)

(5.0 mA ≤ IO ≤ 3.0 A, TJ = +25°C)

(5.0 mA ≤ IO ≤ 3.0 A)

Regload

mV

–

10

30

–

10

30

–

15

80

–

15

80

Thermal Regulation

(Pulse = 10 ms, P = 20 W, TA = +25°C)

Regtherm

–

0.001 0.01

–

0.002 0.03 %VO/W

Quiescent Current

(5.0 mA ≤ IO ≤ 3.0 A, TJ = +25°C)

(5.0 mA ≤ IO ≤ 3.0 A)

IB

mA

–

3.5

5.0

–

3.5

5.0

–

4.0

6.0

–

4.0

6.0

Quiescent Current Change

∆IB

(7.2 Vdc ≤ Vin ≤ 35 Vdc, IO = 5.0 mA, TJ = +25°C;

5.0 mA ≤ IO ≤ 3.0 A, TJ = +25°C;

7.5 Vdc ≤ Vin ≤ 20 Vdc, IO = 1.0 A)

–

0.3

1.0

–

0.3

1.0

mA

Ripple Rejection

(8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz,

IO = 2.0 A, TJ = 25°C)

RR

62

75

–

62

75

–

dB

Dropout Voltage (IO = 3.0 A, TJ = +25°C)

Vin–VO

–

2.2

2.5

–

2.2

2.5

Vdc

Output Noise Voltage

(10 Hz ≤ f ≤ 100 kHz, TJ = +25°C)

Vn

–

10

–

–

10

–

µV/VO

Output Resistance (f = 1.0 kHz)

Short Circuit Current Limit

(Vin = 35 Vdc, TJ = +25°C)

RO

–

2.0

–

–

20

–

mΩ

ISC

–

1.5

–

–

1.5

–

A

Peak Output Current (TJ = +25°C)

Imax

–

5.0

–

Average Temperature Coefficient of Output Voltage

TCVO

–

0.2

–

(IO = 5.0 mA)

–

5.0

–

A

–

0.2

–

mV/°C

NOTES: 1. Although power dissipation is internally limited, specifications apply only for PO ≤ Pmax, Pmax = 25 W.

2. Line and load 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.

2

MOTOROLA ANALOG IC DEVICE DATA

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