MCT7818BT 查看數據表（PDF） - Motorola => Freescale

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MCT7818BT

THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS

Motorola => Freescale 

MCT7800

ELECTRICAL CHARACTERISTICS (continued) (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)

MCT7812B

MCT7812C

Characteristics

Symbol Min

Typ

Max

Min

Typ

Max Unit

Ripple Rejection

15 Vdc ≤ Vin ≤ 25 Vdc, f = 120 Hz

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

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

Output Resistance f = 1.0 kHz

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

Vin = 35 Vdc

Peak Output Current (TJ = +25°C)

Average Temperature Coefficient of Output Voltage

RR

—

62

—

VI – VO

—

2.0

—

Vn

—

10

—

rO

—

18

—

ISC

—

0.2

—

Imax

—

2.2

—

TCVO

—

–1.0

—

dB

—

62

—

—

2.0

—

Vdc

µV/VO

—

10

—

—

18

—

mΩ

A

—

0.2

—

—

2.2

—

A

—

–1.0

— mV/°C

ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)

MCT7815B

MCT7815C

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)

17.5 Vdc ≤ Vin ≤ 30 Vdc

18.5 Vdc ≤ Vin ≤ 30 Vdc

Line Regulation, TJ = +25°C (Note 2)

17.5 Vdc ≤ Vin ≤ 30 Vdc

20 Vdc ≤ Vin ≤ 26 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

17.5 Vdc ≤ Vin ≤ 30 Vdc

18.5 Vdc ≤ Vin ≤ 30 Vdc

5.0 mA ≤ IO ≤ 1.0 A

Ripple Rejection

18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz

VO

14.4

15

15.6 14.4

15

15.6

Vdc

VO

Vdc

—

—

—

14.25

15

15.75

14.25

15

15.75

—

—

—

Regline

—

11

300

—

mV

11

300

—

5.0

150

—

5.0

150

Regload

mV

—

3.0

300

—

3.0

300

—

2.0

150

—

2.0

150

IB

—

5.5

8.0

—

5.5

8.0

mA

∆IB

mA

—

—

—

—

—

1.0

—

—

1.0

—

—

—

—

—

0.5

—

—

0.5

RR

dB

—

60

—

—

60

—

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

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

VI – VO

—

2.0

—

—

2.0

—

Vdc

Vn

µV/VO

—

10

—

—

10

—

Output Resistance f = 1.0 kHz

rO

—

19

—

—

19

—

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

—

–1.0

—

—

–1.0

— 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.

MCT7800

6

MOTOROLA

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