Motorola MC79M15CDT-1, MC79M15CDTRK, MC79M15CT, MC79M15CDT, MC79M15BDT-1 Datasheet

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40° t

125°C

4.0%

125°C

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Order this document by MC79M00/D

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The MC79M00 series of fixed output negative voltage regulators are

intended as complements to the popular MC78M00 series devices.

Available in fixed output voltage options of –5.0, –8.0, –12 and –15 V, these regulators employ current limiting, thermal shutdown, and safe–area compensation – making them remarkably rugged under most operating conditions. With adequate heatsinking they can deliver output currents in excess of 0.5 A.

• No External Components Required

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe–Area Compensation

• Also Available in Surface Mount DPAK (DT) Package

DEVICE TYPE/NOMINAL OUTPUT VOLTAGE

MC79M05 MC79M08

Device

MC79MXXBDT, BDT–1 MC79MXXBT

MC79MXXCDT, CDT–1 MC79MXXCT

XX indicates nominal voltage.

–5.0 V –8.0 V

MC79M12 MC79M15

ORDERING INFORMATION

Output

Voltage

Tolerance

Operating

Temperature Range Package

= –

= 0° to +

o +

–12 V –15 V

DPAK

Plastic Power

DPAK

Plastic Power

THREE–TERMINAL

NEGATIVE FIXED

VOLTAGE REGULATORS

T SUFFIX

PLASTIC PACKAGE

CASE 221A

Heatsink surface

connected to Pin 2.

Pin 1. Ground

2. Input

3. Output

DT SUFFIX

PLASTIC PACKAGE

CASE 369A

(DPAK)

DT–1 SUFFIX

PLASTIC PACKAGE

CASE 369

(DPAK)

Representative Schematic Diagram

4.9 k

2.0 k

20 k 20 k

3.6 k

2.4 k

14.7 k

12 k

1.2 k

1.0 k

1.1 k

This device contains 31 active transistors.

MOTOROLA ANALOG IC DEVICE DATA

11.5 k5472.0 k

20 pF

10 k

10 pF

100

4.0 k

10 k

240

750

Gnd

0.3

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

STANDARD APPLICATION

Input

Cin*

0.33

A common ground is required between the input and the output voltages. The input voltage must remain typically 1.1 V more negative even during the high point of the input ripple voltage.

These two digits of the type number indicate

XX,

nominal voltage. Cin is required if regulator is located an

appreciable distance from power supply filter. CO improve stability and transient response.

 Motorola, Inc. 1996 Rev 4

MC79MXX

Output

CO**

1.0

MC79M00

MAXIMUM RATINGS (T

= 25°C, unless otherwise noted.)

Rating Symbol Value Unit

Input Voltage V Power Dissipation

Case 221A

TA = 25°C P Thermal Resistance, Junction–to–Ambient θ Thermal Resistance, Junction–to–Case θ

Case 369 and 369A (DPAK)

TA = 25°C P Thermal Resistance, Junction–to–Ambient θ Thermal Resistance, Junction–to–Case θ

Storage Junction Temperature T Junction Temperature T

NOTE: ESD data available upon request.

THERMAL CHARACTERISTICS

Characteristic Symbol Value Unit

Thermal Resistance, Junction–to–Ambient R Thermal Resistance, Junction–to–Case R

D JA JC

stg

θJA θJC

–35 Vdc

Internally Limited W

65 °C/W

5.0 °C/W

Internally Limited W

92 °C/W

6.0 °C/W

–65 to +150 °C

150 °C

65 °C/W

5.0 °C/W

MC79M05B, C ELECTRICAL CHARACTERISTICS (V

Characteristic

Output Voltage (TJ = 25°C) V Line Regulation, TJ = 25°C (Note 1)

–7.0 Vdc ≥ VI ≥ –25 Vdc –8.0 Vdc ≥ VI ≥ –18 Vdc

Load Regulation, TJ = 25°C (Note 1)

5.0 mA ≤ IO ≤ 500 mA

Output Voltage

–7.0 Vdc ≥ VI ≥ –25 Vdc, 5.0 mA ≤ IO ≤ 350 mA Input Bias Current (TJ = 25°C) I Input Bias Current Change

–8.0 Vdc ≥ VI ≥ –25 Vdc, IO = 350 mA

5.0 mA ≤ IO ≤ 350 mA, VI = –10 V Output Noise Voltage, TA = 25°C, 10 Hz ≤ f ≤ 100 kHz V Ripple Rejection (f = 120 Hz) RR 54 66 – dB Dropout Voltage

IO = 500 mA, TJ = 25°C

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA, 0°C ≤ TJ ≤ 125°C

NOTES: 1. Load and line regulation are specified at constant temperature. Change in VO due to heating effects must be taken into account separately. Pulse

testing with low duty cycle is used.

2.B = T C = T

low low

to T

, –40°C < TJ < 125°C

high

to T

, 0°C < TJ < 125°C

high

= –10 V, IO = 350 mA, T

low

to T

[Note 2], unless otherwise noted.)

high

Symbol Min Typ Max Unit

–4.8 –5.0 –5.2 Vdc

–

Reg

line

–

Reg

∆I

load

– 30 100

–4.75 – –5.25

– 4.3 8.0 mA

– –

– 40 – µV

– 1.1 –

VI–V

∆VO/∆T

– 0.2 –

7.0

2.0

50 30

Vdc

– –

0.4

Vdc

mV/°C

MOTOROLA ANALOG IC DEVICE DATA

MC79M00

MC79M08B, C ELECTRICAL CHARACTERISTICS (V

Characteristic

Output Voltage (TJ = 25°C) V Line Regulation, TJ = 25°C (Note 1)

–7.0 Vdc ≥ VI ≥ –25 Vdc –8.0 Vdc ≥ VI ≥ –18 Vdc

Load Regulation, TJ = 25°C (Note 1)

5.0 mA ≤ IO ≤ 500 mA

Output Voltage

–7.0 Vdc ≥ VI ≥ –25 Vdc, 5.0 mA ≤ IO ≤ 350 mA Input Bias Current (TJ = 25°C) I Input Bias Current Change

–8.0 Vdc ≥ VI ≥ –25 Vdc, IO = 350 mA

5.0 mA ≤ IO ≤ 350 mA, VI = –10 V Output Noise Voltage, TA = 25°C, 10 Hz ≤ f ≤ 100 kHz V Ripple Rejection (f = 120 Hz) RR 54 63 – dB Dropout Voltage

IO = 500 mA, TJ = 25°C

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA, 0°C ≤ TJ ≤ 125°C

= –10 V, IO = 350 mA, T

low

to T

[Note 2], unless otherwise noted.)

high

Symbol Min Typ Max Unit

–7.7 –8.0 –8.3 Vdc

–

Reg

line

–

Reg

∆I

load

– 30 100

–7.6 –8.0 –8.4

– – 8.0 mA

– –

– 60 – µV

– 1.1 –

VI–V

∆VO/∆T

– 0.4 –

5.0

3.0

80 50

– –

0.4

mV/°C

Vdc

MC79M12B, C ELECTRICAL CHARACTERISTICS

Output Voltage (TJ = 25°C) V Line Regulation, TJ = 25°C (Note 1)

–14.5 Vdc ≥ VI ≥ –30 Vdc –15 Vdc ≥ VI ≥ –25 Vdc

Load Regulation, TJ = 25°C (Note 1)

5.0 mA ≤ IO ≤ 500 mA Output Voltage

–14.5 Vdc ≥ VI ≥ –30 Vdc, 5.0 mA ≤ IO ≤ 350 mA Input Bias Current (TJ = 25°C) I Input Bias Current Change

–14.5 Vdc ≥ VI ≥ –30 Vdc, IO = 350 mA

5.0 mA ≤ IO ≤ 350 mA, VI = –19 V Output Noise Voltage, TA = 25°C, 10 Hz ≤ f ≤ 100 kHz V Ripple Rejection (f = 120 Hz) RR 54 60 – dB Dropout Voltage

IO = 500 mA, TJ = 25°C

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA, 0°C ≤ TJ ≤ 125°C

NOTES: 1. Load and line regulation are specified at constant temperature. Change in VO due to heating effects must be taken into account separately. Pulse

testing with low duty cycle is used.

2.B = T C = T

low low

to T

, –40°C < TJ < 125°C

high

to T

, 0°C < TJ < 125°C

high

(VI = –19 V, IO = 350 mA, T

Characteristic

low

to T

[Note 2], unless otherwise noted.)

high

Symbol Min Typ Max Unit

–11.5 –12 –12.5 Vdc

–

Reg

line

–

Reg

∆I

load

– 30 240

–11.4 – –12.6

– 4.4 8.0 mA

– –

– 75 – µV

– 1.1 –

VI–V

∆VO/∆T

– –0.8 –

5.0

3.0

80 50

Vdc

– –

0.4

Vdc

mV/°C

MOTOROLA ANALOG IC DEVICE DATA

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