MCT7800
5
MCT7800
MOTOROLA
ELECTRICAL CHARACTERISTICS
(Vin = 15 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7809B
MCT7809C
Characteristics
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25
°
C)
Output Voltage (5.0 mA
≤
IO
≤
1.0 A, PO
≤
15 W)
11.5 Vdc
≤
Vin
≤
24 Vdc
12.5 Vdc
≤
Vin
≤
24 Vdc
Line Regulation, TJ = +25
°
C (Note 2)
11.5 Vdc
≤
Vin
≤
26 Vdc
11.5 Vdc
≤
Vin
≤
17 Vdc
Load Regulation, TJ = +25
°
C (Note 2)
5.0 mA
≤
IO
≤
1.5 A
250 mA
≤
IO
≤
750 mA
Quiescent Current (TJ = +25
°
C)
Quiescent Current Change
11.5 Vdc
≤
Vin
≤
26 Vdc
12.5 Vdc
≤
Vin
≤
26 Vdc
5.0 mA
≤
IO
≤
1.0 A
Ripple Rejection
11.5 Vdc
≤
Vin
≤
21.5 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = +25
°
C)
Output Noise Voltage (TA = +25
°
C)
10 Hz
≤
f
≤
100 kHz
Output Resistance f = 1.0 kHz
Short Circuit Current Limit (TA = +25
°
C)
Vin = 35 Vdc
Peak Output Current (TJ = +25
°
C)
Average Temperature Coefficient of Output Voltage
VO
VO
8.65
9.0
9.35
8.65
9.0
9.35
Vdc
Vdc
—
8.55
—
9.0
—
9.45
8.55
—
9.0
—
9.45
—
Regline
—
—
8.0
4.0
50
25
—
—
8.0
4.0
50
25
mV
Regload
—
—
3.0
2.0
50
25
—
—
3.0
2.0
50
25
mV
IB
IB
—
5.5
8.0
—
5.5
8.0
mA
mA
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
RR
—
62
—
—
62
—
dB
VI – VO
Vn
—
2.0
—
—
2.0
—
Vdc
μ
V/VO
—
10
—
—
10
—
rO
ISC
—
18
—
—
18
—
m
A
—
0.2
—
—
0.2
—
Imax
TCVO
—
—
2.2
–1.0
—
—
—
—
2.2
–1.0
—
—
A
mV/
°
C
ELECTRICAL CHARACTERISTICS
(Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7812B
MCT7812C
Characteristics
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = +25
°
C)
Output Voltage (5.0 mA
≤
IO
≤
1.0 A, PO
≤
15 W)
14.5 Vdc
≤
Vin
≤
27 Vdc
15.5 Vdc
≤
Vin
≤
27 Vdc
Line Regulation, TJ = +25
°
C (Note 2)
14.5 Vdc
≤
Vin
≤
30 Vdc
16 Vdc
≤
Vin
≤
22 Vdc
Load Regulation, TJ = +25
°
C (Note 2)
5.0 mA
≤
IO
≤
1.5 A
250 mA
≤
IO
≤
750 mA
Quiescent Current (TJ = +25
°
C)
Quiescent Current Change
14.5 Vdc
≤
Vin
≤
30 Vdc
15 Vdc
≤
Vin
≤
30 Vdc
5.0 mA
≤
IO
≤
1.0 A
NOTES:
1. Tlow= 0
°
C for MCT78XXC
= – 40
°
C for MCT78XXB
VO
VO
11.5
12
12.5
11.5
12
12.5
Vdc
Vdc
—
11.4
—
12
—
12.6
11.4
—
12
—
12.6
—
Regline
—
—
10
5.0
240
120
—
—
10
5.0
240
120
mV
Regload
—
—
3.0
2.0
240
120
—
—
3.0
2.0
240
120
mV
IB
IB
—
5.5
8.0
—
5.5
8.0
mA
mA
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
Thigh= +125
°
C for MCT78XXB, C. When the junction temperature exceeds +125
°
C, internal current limiting
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.