Motorola MCT7824BT, MCT7824CD2T, MCT7824CT, MCT7818CD2T, MCT7818CT Datasheet

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Order this document by MCT7800/D





THREE-TERMINAL

POSITIVE FIXED

VOLTAGE REGULATORS

Pin 1. Input

2. Ground

3. Output

STANDARD APPLICATION

A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V above the output voltage even during the low point on the input ripple voltage.

XX, these two digits of the type number indicate

nominal voltage.

** Cin is required if regulator is located an

appreciable distance from power supply filter.

** Some CO is recommended for stability; it does

improve transient response. Values less than

0.1 µF could cause instability.

MCT78XX

Input

Cin*

0.33

CO**

Output

T SUFFIX

PLASTIC PACKAGE

CASE 221A

Heatsink surface

connected to Pin 2.

D2T SUFFIX

PLASTIC PACKAGE

CASE 936

(D2PAK)

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

MCT7800

MOTOROLA

   

These voltage regulators are monolithic integrated circuits designed as fixed-voltage regulators for a wide variety of applications including local, on-card regulation. These regulators employ internal current limiting, thermal shutdown, and safe-area compensation. With adequate heatsinking they can deliver output currents in excess of 1.0 A. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.

• Output Current in Excess of 1.0 A

• No External Components Required

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe-Area Compensation

• Output Voltage Offered with a 4% Tolerance

• Available in Surface Mount D

PAK and Standard 3-Lead Transistor

Packages

This MCT-prefixed device is intended to be a possible replacement for the similar device with the MC-prefix. Because the MCT device originates from different source material, there may be subtle differences in typical parameter values or characteristic curves. Due to the diversity of potential applications, Motorola can not assure identical performance in all circuits. Motorola recommends that the customer qualify the MCT-prefixed device in each potential application.

DEVICE TYPE/NOMINAL OUTPUT VOLTAGE

MCT7805 MCT7806 MCT7808 MCT7809

5.0 V

6.0 V

8.0 V

9.0 V

MCT7812 MCT7815 MCT7818 MCT7824

12 V 15 V 18 V 24 V

ORDERING INFORMATION

Device

Output Voltage

Tolerance

Tested Operating

Temperature Range

Package

MCT78XXBD2T

Surface Mount

MCT78XXBT

TJ = – 40° to +125°C

Insertion Mount

MCT78XXCD2T

Surface Mount

MCT78XXCT

TJ = 0° to +125°C

Insertion Mount

XX indicates nominal voltage.

 Motorola, Inc. 1994 Rev 3

MCT7800

MCT7800 2

MOTOROLA

MAXIMUM RATINGS

(TA = +25°C, unless otherwise noted.)

Rating

Symbol Value Unit

Input Voltage V

35 Vdc

Power Dissipation

Case 221A

TA = +25°C P

Internally Limited W

Thermal Resistance, Junction-to-Ambient θ

65 °C/W

Thermal Resistance, Junction-to-Case θ

5.0 °C/W

Case 936 (D2PAK)

TA = +25°C P

Internally Limited W

Thermal Resistance, Junction-to-Ambient θ

70 °C/W

Thermal Resistance, Junction-to-Case θ

5.0 °C/W

Storage Junction Temperature Range T

stg

– 65 to +150 °C

Operating Junction Temperature T

+150 °C

Representative Schematic Diagram

100 500

3.3 k

2.7 k

500

1.4 k

100 100 10 k

Input

Output

Gnd

240

200 0.3

6.0 k

2.0 k

30 pF

28 k

6.0 k 1.0 k 5.0 k

0.25 k

5.0 k

This device contains 19 active transistors.

MCT7800

MOTOROLA

ELECTRICAL CHARACTERISTICS (V

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

low

to T

high

[Note 1], unless otherwise noted.)

MCT7805B MCT7805C

Characteristics Symbol Min Typ Max Min Typ Max Unit

Output Voltage (TJ = +25°C) V

4.8 5.0 5.2 4.8 5.0 5.2 Vdc

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

7.0 Vdc ≤ Vin ≤ 20 Vdc

8.0 Vdc ≤ Vin ≤ 20 Vdc

—

4.75

—

5.0

—

5.25

4.75 —

5.0 —

5.25 —

Vdc

Line Regulation, TJ = +25°C (Note 2)

7.0 Vdc ≤ Vin ≤ 25 Vdc

8.0 Vdc ≤ Vin ≤ 12 Vdc

Reg

line

— —

7.0

2.0

100

— —

7.0

2.0

100

Load Regulation, TJ = +25°C (Note 2)

5.0 mA ≤ Vin ≤ 1.5 A 250 mA ≤ Vin ≤ 750 mA

Reg

load

— —

2.0

1.5

100

— —

2.0

1.5

100

Quiescent Current (TJ = +25°C) I

— 5.5 8.0 — 5.5 8.0 mA

Quiescent Current Change

7.0 Vdc ≤ Vin ≤ 25 Vdc

8.0 Vdc ≤ Vin ≤ 25 Vdc

5.0 mA ≤ IO ≤ 1.0 A

∆I

— — —

—

1.3

0.5

— — —

1.3 —

0.5

Ripple Rejection

8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz

— 65 — — 65 —

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

— 2.0 — — 2.0 — Vdc

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

— 10 — — 10 —

µV/V

Output Resistance f = 1.0 kHz r

— 1.3 — — 1.3 — mΩ

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

Vin = 35 Vdc

— 0.2 — — 0.2 —

Peak Output Current (TJ = +25°C) I

max

— 2.2 — — 2.2 — A

Average Temperature Coefficient of Output Voltage TCV

— 0.5 — — 0.5 — mV/°C

ELECTRICAL CHARACTERISTICS (V

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

low

to T

high

[Note 1], unless otherwise noted.)

MCT7806B MCT7806C

Characteristics Symbol Min Typ Max Min Typ Max Unit

Output Voltage (TJ = +25°C) V

5.75 6.0 6.25 5.75 6.0 6.25 Vdc

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

8.0 Vdc ≤ Vin ≤ 21 Vdc

9.0 Vdc ≤ Vin ≤ 21 Vdc

—

5.7

—

6.0

—

6.3

5.7 —

6.0 —

6.3 —

Vdc

Line Regulation, TJ = +25°C (Note 2)

8.0 Vdc ≤ Vin ≤ 25 Vdc

9.0 Vdc ≤ Vin ≤ 13 Vdc

Reg

line

— —

7.0

2.0

120

— —

7.0

2.0

120

Load Regulation, TJ = +25°C (Note 2)

5.0 mA ≤ Vin ≤ 1.5 A 250 mA ≤ Vin ≤ 750 mA

Reg

load

— —

2.0

1.5

120

— —

2.0

1.5

120

Quiescent Current (TJ = +25°C) I

— 5.5 8.0 — 5.5 8.0 mA

Quiescent Current Change

8.0 Vdc ≤ Vin ≤ 25 Vdc

9.0 Vdc ≤ Vin ≤ 25 Vdc

5.0 mA ≤ IO ≤ 1.0 A

∆I

— — —

—

1.3

0.5

— — —

1.3 —

0.5

Ripple Rejection

9.0 Vdc ≤ Vin ≤ 19 Vdc, f = 120 Hz

— 65 — — 65 —

NOTES: 1. T

low

= 0°C for MCT78XXC T

high

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

= – 40°C for MCT78XXB 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

MCT7800 4

MOTOROLA

ELECTRICAL CHARACTERISTICS (continued)

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

low

to T

high

[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) VI – V

— 2.0 — — 2.0 — Vdc

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

— 10 — — 10 —

µV/V

Output Resistance f = 1.0 kHz r

— 1.3 — — 1.3 — mΩ

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

Vin = 35 Vdc

— 0.2 — — 0.2 —

Peak Output Current (TJ = +25°C) I

max

— 2.2 — — 2.2 — A

Average Temperature Coefficient of Output Voltage TCV

— –0.8 — — –0.8 — mV/°C

ELECTRICAL CHARACTERISTICS (V

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

low

to T

high

[Note 1], unless otherwise noted.)

MCT7808B MCT7808C

Characteristics Symbol Min Typ Max Min Typ Max Unit

Output Voltage (TJ = +25°C) V

7.7 8.0 8.3 7.7 8.0 8.3 Vdc

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

10.5 Vdc ≤ Vin ≤ 23 Vdc

11.5 Vdc ≤ Vin ≤ 23 Vdc

—

7.6

—

8.0

—

8.4

7.6 —

8.0 —

8.4 —

Vdc

Line Regulation, TJ = +25°C (Note 2)

10.5 Vdc ≤ Vin ≤ 25 Vdc 11 Vdc ≤ Vin ≤ 17 Vdc

Reg

line

— —

7.0

2.0

160

— —

7.0

2.0

160

Load Regulation, TJ = +25°C (Note 2)

5.0 mA ≤ IO ≤ 1.5 A 250 mA ≤ IO ≤ 750 mA

Reg

load

— —

2.0

1.5

160

— —

2.0

1.5

160

Quiescent Current (TJ = +25°C) I

— 5.5 8.0 — 5.5 8.0 mA

Quiescent Current Change

10.5 Vdc ≤ Vin ≤ 25 Vdc

11.5 Vdc ≤ Vin ≤ 25 Vdc

5.0 mA ≤ IO ≤ 1.0 A

∆I

— — —

—

1.0

0.5

— — —

1.0 —

0.5

Ripple Rejection

11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz

— 63 — — 63 —

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

— 2.0 — — 2.0 — Vdc

Output Noise Voltage (TA = +25°C)

10 Hz ≤ f ≤ 100 kHz

— 10 — — 10 —

µV/V

Output Resistance f = 1.0 kHz r

— 18 — — 18 — mΩ

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

Vin = 35 Vdc

— 0.2 — — 0.2 —

Peak Output Current (TJ = +25°C) I

max

— 2.2 — — 2.2 — A

Average Temperature Coefficient of Output Voltage TCV

— –0.8 — — –0.8 — mV/°C

NOTES: 1. T

low

= 0°C for MCT78XXC T

high

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

= – 40°C for MCT78XXB 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.

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