MCT7818BT Просмотр технического описания (PDF) - Motorola => Freescale

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MCT7818BT

THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS

Motorola => Freescale 

MCT7800

ELECTRICAL CHARACTERISTICS (continued) (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)

MCT7806B

MCT7806C

Characteristics

Symbol Min

Typ

Max

Min

Typ

Max Unit

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

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

Vin = 35 Vdc

Peak Output Current (TJ = +25°C)

Average Temperature Coefficient of Output Voltage

rO

—

1.3

—

ISC

—

0.2

—

Imax

—

2.2

—

TCVO

—

– 0.8

—

—

1.3

—

mΩ

A

—

0.2

—

—

2.2

—

A

—

– 0.8

— mV/°C

ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)

MCT7808B

MCT7808C

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)

10.5 Vdc ≤ Vin ≤ 23 Vdc

11.5 Vdc ≤ Vin ≤ 23 Vdc

Line Regulation, TJ = +25°C (Note 2)

10.5 Vdc ≤ Vin ≤ 25 Vdc

11 Vdc ≤ Vin ≤ 17 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

10.5 Vdc ≤ Vin ≤ 25 Vdc

11.5 Vdc ≤ Vin ≤ 25 Vdc

5.0 mA ≤ IO ≤ 1.0 A

Ripple Rejection

11.5 Vdc ≤ Vin ≤ 21.5 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

7.7

8.0

8.3

7.7

8.0

8.3

Vdc

VO

Vdc

—

—

—

7.6

8.0

8.4

7.6

8.0

8.4

—

—

—

Regline

mV

—

7.0

160

—

7.0

160

—

2.0

80

—

2.0

80

Regload

mV

—

2.0

160

—

2.0

160

—

1.5

80

—

1.5

80

IB

—

5.5

8.0

—

5.5

8.0

mA

∆IB

mA

—

—

—

—

—

1.0

—

—

1.0

—

—

—

—

—

0.5

—

—

0.5

RR

dB

—

63

—

—

63

—

VI – VO

—

2.0

—

—

2.0

—

Vdc

Vn

µV/VO

—

10

—

—

10

—

Output Resistance f = 1.0 kHz

rO

—

18

—

—

18

—

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

—

– 0.8

—

—

– 0.8

— 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

4

MOTOROLA

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