MC7900 Series

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7

MC7918C

ELECTRICAL CHARACTERISTICS (VI = −27 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)

Characteristics

Symbol

Min

Typ

Max

Unit

Output Voltage (TJ = +25°C)

VO

−17.3

−18

−18.7

Vdc

Line Regulation (Note 6)

(TJ = +25°C, IO = 100 mA)

−21 Vdc ≥ VI ≥ −33 Vdc

−24 Vdc ≥ VI ≥ −30 Vdc

(TJ = +25°C, IO = 500 mA)

−21 Vdc ≥ VI ≥ −33 Vdc

−24 Vdc ≥ VI ≥ −30 Vdc

Regline

−

−

−

−

25

10

90

50

180

90

360

180

mV

Load Regulation, TJ = +25°C (Note 6)

5.0 mA ≤ IO ≤ 1.5 A

250 mA ≤ IO ≤ 750 mA

Regload

−

−

110

55

360

180

mV

Output Voltage

−21 Vdc ≥ VI ≥ −33 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W

VO

−17.1

−

−18.9

Vdc

Input Bias Current (TJ = +25°C)

IIB

−

4.5

8.0

mA

Input Bias Current Change

−21 Vdc ≥ VI ≥ −33 Vdc

5.0 mA ≤ IO ≤ 1.5 A

DIIB

−

−

−

−

1.0

0.5

mA

Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

Vn

−

110

−

mV

Ripple Rejection (IO = 20 mA, f = 120 Hz)

RR

−

59

−

dB

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

VI−VO

−

1.3

−

Vdc

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA, 0°C ≤ TJ ≤ +125°C

DVO/DT

−

−1.0

−

mV/°C

MC7924B, MC7924C

ELECTRICAL CHARACTERISTICS (VI = −33 V, IO = 500 mA, Tlow* < TJ < +125°C, unless otherwise noted.)

Characteristics

Symbol

Min

Typ

Max

Unit

Output Voltage (TJ = +25°C)

VO

−23

−24

−25

Vdc

Line Regulation (Note 6)

(TJ = +25°C, IO = 100 mA)

−27 Vdc ≥ VI ≥ −38 Vdc

−30 Vdc ≥ VI ≥ −36 Vdc

(TJ = +25°C, IO = 500 mA)

−27 Vdc ≥ VI ≥ −38 Vdc

−30 Vdc ≥ VI ≥ −36 Vdc

Regline

−

−

−

−

31

14

118

70

240

120

470

240

mV

Load Regulation, TJ = +25°C (Note 6)

5.0 mA ≤ IO ≤ 1.5 A

250 mA ≤ IO ≤ 750 mA

Regload

−

−

150

85

480

240

mV

Output Voltage

−27 Vdc ≥ VI ≥ −38 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W

VO

−22.8

−

−25.2

Vdc

Input Bias Current (TJ = +25°C)

IIB

−

4.6

8.0

mA

Input Bias Current Change

−27 Vdc ≥ VI ≥ −38 Vdc

5.0 mA ≤ IO ≤ 1.5 A

DIIB

−

−

−

−

1.0

0.5

mA

Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz)

Vn

−

170

−

mV

Ripple Rejection (IO = 20 mA, f = 120 Hz)

RR

−

56

−

dB

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

VI−VO

−

1.3

−

Vdc

Average Temperature Coefficient of Output Voltage

IO = 5.0 mA, Tlow* ≤ TJ ≤ +125°C

DVO/DT

−

−1.0

−

mV/°C

6. 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.

*Tlow = −40°C for MC7924B and Tlow = 0°C for MC7924C.