Motorola MC7912CD2T, MC7912BD2T, MC7912BT, MC7918BT, MC7918CD2T Datasheet

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Surface Mount

125°C

40° to +125°C

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Order this document by MC7900/D

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The MC7900 series of fixed output negative voltage regulators are intended as complements to the popular MC7800 series devices. These negative regulators are available in the same seven–voltage options as the MC7800 devices. In addition, one extra voltage option commonly employed in MECL systems is also available in the negative MC7900 series.

Available in fixed output voltage options from – 5.0 V to –24 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 1.0 A.

• No External Components Required

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe–Area Compensation

• Available in 2% Voltage Tolerance (See Ordering Information)

3.6 k

1.2 k

Representative Schematic Diagram

2.4 k

14.7 k

4.0 k

12 k

1.0 k

2.0 k

8.0 k

1.0 k

1.6 k

4.0 k

Gnd

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

D2T SUFFIX

PLASTIC PACKAGE

CASE 936

(D2PAK)

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

1.1 k

This device contains 26 active transistors.

ORDERING INFORMATION

Output Voltage

Device

MC79XXACD2T 2% MC79XXCD2T 4% MC79XXACT 2% MC79XXCT 4% MC79XXBD2T MC79XXBT

XX indicates nominal voltage.

Tolerance

2.0 k

20 pF

20 k 20 k

Operating

Temperature Range

= 0° to +

–

= –

10 k

10 pF

10 k

240

nsertion Moun

Surface Mount

Insertion Mount

750

Package

0.3

and the output voltages. The input voltage must remain typically 2.0 V above more negative even during the high point of the input ripple voltage.

XX,

STANDARD APPLICATION

Input

Cin*

0.33

A common ground is required between the input

These two digits of the type number indicate nominal voltage. Cin is required if regulator is located an

appreciable distance from power supply filter.

CO improve stability and transient response.

MC79XX

DEVICE TYPE/NOMINAL OUTPUT VOLTAGE

MC7905 MC7905.2 MC7906 MC7908

5.0 V

5.2 V

6.0 V

8.0 V

MC7912 MC7915 MC7918 MC7924

CO**

1.0

Output

12 V 15 V 28 V 24 V

MOTOROLA ANALOG IC DEVICE DATA

 Motorola, Inc. 1996 Rev 6

MC7900

MAXIMUM RATINGS (T

Rating Symbol Value Unit

Input Voltage (–5.0 V ≥ VO ≥ –18 V)

Input Voltage (24 V)

Power Dissipation Case 221A

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

Case 936 (D2PAK)

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

Thermal Resistance, Junction–to–Case θ Storage Junction Temperature Range T Junction Temperature T

= +25°C, unless otherwise noted.)

D JA JC

stg

–35 –40

Internally Limited W

65 °C/W

5.0 °C/W

Internally Limited W

70 °C/W

5.0 °C/W

–65 to +150 °C

+150 °C

Vdc

THERMAL CHARACTERISTICS

Characteristics Symbol Max Unit

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

θJA θJC

65 °C/W

5.0 °C/W

MC7905C ELECTRICAL CHARACTERISTICS (V

Characteristics

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

(TJ = +25°C, IO = 100 mA)

–7.0 Vdc ≥ VI ≥ –25 Vdc –8.0 Vdc ≥ VI ≥ –12 Vdc

(TJ = +25°C, IO = 500 mA)

–7.0 Vdc ≥ VI ≥ –25 Vdc –8.0 Vdc ≥ VI ≥ –12 Vdc

Load Regulation, TJ = +25°C (Note 1)

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

Output Voltage

–7.0 Vdc ≥ VI ≥ –20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W Input Bias Current (TJ = +25°C) I Input Bias Current Change

–7.0 Vdc ≥ VI ≥ –25 Vdc

5.0 mA ≤ IO ≤ 1.5 A Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V Ripple Rejection (IO = 20 mA, f = 120 Hz) RR – 70 – dB Dropout Voltage

IO = 1.0 A, TJ = +25°C

Average Temperature Coef ficient of Output Voltage

IO = 5.0 mA, 0°C ≤ TJ ≤ +125°C

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

NOTE: 1. Pulse testing with low duty cycle is used.

= –10 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)

Symbol Min Typ Max Unit

Reg

line

Reg

load

∆I

VI–V

∆VO/∆T

–4.8 –5.0 –5.2 Vdc

– –

–4.75 – –5.25

– 4.3 8.0 mA

– –

– 40 – µV

– 2.0 –

– –1.0 –

7.0

2.0

8.0

4.0

50 25

100

– –

1.3

0.5

Vdc

mV/°C

MOTOROLA ANALOG IC DEVICE DATA

MC7900

MC7905AC ELECTRICAL CHARACTERISTICS (V

Characteristics

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

–8.0 Vdc ≥ VI ≥ –12 Vdc; IO = 1.0 A, TJ = +25°C –8.0 Vdc ≥ VI ≥ –12 Vdc; IO = 1.0 A –7.5 Vdc ≥ VI ≥ –25 Vdc; IO = 500 mA –7.0 Vdc ≥ VI ≥ –20 Vdc; IO = 1.0 A, TJ = +25°C

Load Regulation (Note 1)

5.0 mA ≤ IO ≤ 1.5 A, TJ = +25°C

250 mA ≤ IO ≤ 750 mA

5.0 mA ≤ IO ≤ 1.0 A Output Voltage

–7.5 Vdc ≥ VI ≥ –20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W Input Bias Current I Input Bias Current Change

–7.5 Vdc ≥ VI ≥ –25 Vdc

5.0 mA ≤ IO ≤ 1.0 A

5.0 mA ≤ IO ≤ 1.5 A, TJ = +25°C Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V Ripple Rejection (IO = mA, f = 120 Hz) RR – 70 – dB Dropout Voltage

IO = 1.0 A. TJ = +25°C

Average Temperature Coef ficient of Output Voltage

IO = 5.0 A, 0°C ≤ TJ ≤ +125°C

= –10 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)

Symbol Min Typ Max Unit

Reg

line

Reg

load

∆I

VI–V

∆VO/∆T

–4.9 –5.0 –5.1 Vdc

– – – –

– – –

–4.80 – –5.20

– 4.4 8.0 mA

– – –

– 40 – µV

– 2.0 –

– –1.0 –

2.0

7.0

6.0

4.0

9.0

25 50 50 50

100

– – –

1.3

0.5

mV/°C

Vdc

MC7905.2C ELECTRICAL CHARACTERISTICS

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

(TJ = +25°C, IO = 100 mA)

–7.2 Vdc ≥ VI ≥ –25 Vdc –8.0 Vdc ≥ VI ≥ –12 Vdc

(TJ = +25°C, IO = 500 mA)

–7.2 Vdc ≥ VI ≥ –25 Vdc –8.0 Vdc ≥ VI ≥ –12 Vdc

Load Regulation, TJ = +25°C (Note 1)

5.0 mA ≤ IO ≤ 1.5 A

250 mA ≤ IO ≤ 750 mA

Output Voltage

–7.2 Vdc ≥ VI ≥ –20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W Input Bias Current (TJ = +25°C) I Input Bias Current Change

–7.2 Vdc ≥ VI ≥ –25 Vdc

5.0 mA ≤ IO ≤ 1.5 A Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V Ripple Rejection (IO = 20 mA, f = 120 Hz) RR – 68 – dB Dropout Voltage

IO = 1.0 A, TJ = +25°C

Average Temperature Coef ficient of Output Voltage

IO = 5.0 mA, 0°C ≤ TJ ≤ +125°C

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

NOTE: 1. Pulse testing with low duty cycle is used.

(VI = –10 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Reg

line

Reg

load

∆I

VI–V

∆VO/∆T

–5.0 –5.2 –5.4 Vdc

– –

–4.95 – –5.45

– 4.3 8.0 mA

– –

– 42 – µV

– 2.0 –

– –1.0 –

8.0

2.2

8.5

4.5

52 27

105

– –

1.3

0.5

Vdc

mV/°C

MOTOROLA ANALOG IC DEVICE DATA

MC7900

MC7906C ELECTRICAL CHARACTERISTICS

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

(TJ = +25°C, IO = 100 mA)

–8.0 Vdc ≥ VI ≥ –25 Vdc –9.0 Vdc ≥ VI ≥ –13 Vdc

(TJ = +25°C, IO = 500 mA)

–8.0 Vdc ≥ VI ≥ –25 Vdc –9.0 Vdc ≥ VI ≥ –13 Vdc

Load Regulation, TJ = +25°C (Note 1)

5.0 mA ≤ IO ≤ 1.5 A

250 mA ≤ IO ≤ 750 mA

Output Voltage

–8.0 Vdc ≥ VI ≥ –21 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W Input Bias Current (TJ = +25°C) I Input Bias Current Change

–8.0 Vdc ≥ VI ≥ –25 Vdc

5.0 mA ≤ IO ≤ 1.5 A Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V Ripple Rejection (IO = 20 mA, f = 120 Hz) RR – 65 – dB Dropout Voltage

IO = 1.0 A, TJ = +25°C

Average Temperature Coef ficient of Output Voltage

IO = 5.0 A, 0°C ≤ TJ ≤ +125°C

(VI = –11 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)

Characteristics

Symbol Min Typ Max Unit

Reg

line

Reg

load

∆I

VI–V

∆VO/∆T

–5.75 –6.0 –6.25 Vdc

– –

–5.7 – –6.3

– 4.3 8.0 mA

– –

– 45 – µV

– 2.0 –

– –1.0 –

9.0

3.0

43 10

5.0

60 30

120

– –

1.3

0.5

mV/°C

Vdc

MC7908C ELECTRICAL CHARACTERISTICS (V

Characteristics

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

(TJ = +25°C, IO = 100 mA)

–10.5 Vdc ≥ VI ≥ –25 Vdc

–11 Vdc ≥ VI ≥ –17 Vdc

(TJ = +25°C, IO = 500 mA)

–10.5 Vdc ≥ VI ≥ –25 Vdc –11 Vdc ≥ VI ≥ –17 Vdc

Load Regulation, TJ = +25°C (Note 1)

5.0 mA ≤ IO ≤ 1.5 A

250 mA ≤ IO ≤ 750 mA

Output Voltage

–10.5 Vdc ≥ VI ≥ –23 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W Input Bias Current (TJ = +25°C) I Input Bias Current Change

–10.5 Vdc ≥ VI ≥ –25 Vdc

5.0 mA ≤ IO ≤ 1.5 A Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V Ripple Rejection (IO = 20 mA, f = 120 Hz) RR – 62 – dB Dropout Voltage

IO = 1.0 A, TJ = +25°C

Average Temperature Coef ficient of Output Voltage

IO = 5.0 mA, 0°C ≤ TJ ≤ +125°C

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

NOTE: 1. Pulse testing with low duty cycle is used.

= –14 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)

Symbol Min Typ Max Unit

Reg

line

Reg

load

∆I

VI–V

∆VO/∆T

–7.7 –8.0 –8.3 Vdc

– –

–7.6 – –8.4

– 4.3 8.0 mA

– –

– 52 – µV

– 2.0 –

– –1.0 –

5.0

50 22

9.0

80 40

160

– –

1.0

0.5

Vdc

mV/°C

MOTOROLA ANALOG IC DEVICE DATA

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