MC79L12ABD datasheet(5/6 Pages) MOTOROLA

Part #	MC79L12ABD

Description	THREE-TERMINAL LOW CURRENT NEGATIVE FIXED VOLTAGE REGULATORS

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Manufacturer	MOTOROLA [Motorola, Inc]

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MC79L00, A Series

5

MOTOROLA ANALOG IC DEVICE DATA

TYPICAL CHARACTERISTICS

(TA = +25°C, unless otherwise noted.)

Figure 3. Dropout Characteristics

Figure 4. Dropout Voltage versus

Junction Temperature

Figure 5. Input Bias Current versus

Ambient Temperature

Figure 6. Input Bias Current versus

Input Voltage

Figure 7. Maximum Average Power Dissipation

versus Ambient Temperature (TO–92)

8.0

6.0

4.0

2.0

0

–2.0

–4.0

–6.0

–0.8

–10

Vin, INPUT VOLTAGE (V)

MC79L05C

VO = –5.0 V

TJ = 25°C

IO = 1.0 mA

IO = 100 mA

IO = 40 mA

–2.5

–2.0

–1.5

–1.0

–0.5

0

25

50

75

100

125

TJ, JUNCTION TEMPERATURE (°C)

IO = 70 mA

4.0

4.2

3.8

3.6

3.4

3.2

3.0

0

25

50

75

100

125

TA, AMBIENT TEMPERATURE (°C)

MC79L05C

Vin = –10 V

VO = –5.0 V

IO = 40 mA

5.0

4.0

3.0

2.0

1.0

0

–5.0

–10

–15

–20

–25

–30

–35

–40

Vin, INPUT VOLTAGE (V)

MC79L05C

VO = –5.0 V

IO = 40 mA

10,000

1,000

100

10

TA, AMBIENT TEMPERATURE (°C)

25

50

75

100

125

150

No Heatsink

R

ΘJA = 200°C/W

PD(max) to 25°C = 625 mW

Figure 8. SOP–8 Thermal Resistance and Maximum

Power Dissipation versus P.C.B. Copper Length

30

50

70

90

110

130

150

0.4

0.8

1.2

1.6

2.0

2.4

2.8

020

30

50

40

10

L, LENGTH OF COPPER (mm)

170

3.2

PD(max) for TA = +50°C

R

θJA

2.0 oz.

Copper

Graph represents symmetrical layout

3.0 mm

L

IO = 40 mA

IO = 1.0 mA

Dropout of Regulation is

defined when

∆VO = 2% of VO

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