MCT7800
MCT7800
4
MOTOROLA
ELECTRICAL CHARACTERISTICS (continued)
(Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7806B
Typ
MCT7806C
Typ
Characteristics
Symbol
Min
Max
Min
Max
Unit
Dropout Voltage (IO = 1.0 A, TJ = +25
°
C)
Output Noise Voltage (TA = +25
°
C)
10 Hz
≤
f
≤
100 kHz
VI – VO
Vn
—
2.0
—
—
2.0
—
Vdc
—
10
—
—
10
—
μ
V/VO
Output Resistance f = 1.0 kHz
rO
ISC
—
1.3
—
—
1.3
—
m
Short Circuit Current Limit (TA = +25
°
C)
Vin = 35 Vdc
—
0.2
—
—
0.2
—
A
Peak Output Current (TJ = +25
°
C)
Average Temperature Coefficient of Output Voltage
Imax
TCVO
—
2.2
—
—
2.2
—
A
—
–0.8
—
—
–0.8
—
mV/
°
C
ELECTRICAL CHARACTERISTICS
(Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MCT7808B
Typ
MCT7808C
Typ
Characteristics
Symbol
Min
Max
Min
Max
Unit
Output Voltage (TJ = +25
°
C)
Output Voltage (5.0 mA
≤
IO
≤
1.0 A, PO
≤
15 W)
10.5 Vdc
≤
Vin
≤
23 Vdc
11.5 Vdc
≤
Vin
≤
23 Vdc
Line Regulation, TJ = +25
°
C (Note 2)
10.5 Vdc
≤
Vin
≤
25 Vdc
11 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
10.5 Vdc
≤
Vin
≤
25 Vdc
11.5 Vdc
≤
Vin
≤
25 Vdc
5.0 mA
≤
IO
≤
1.0 A
Ripple Rejection
11.5 Vdc
≤
Vin
≤
21.5 Vdc, f = 120 Hz
VO
VO
7.7
8.0
8.3
7.7
8.0
8.3
Vdc
—
7.6
—
8.0
—
8.4
7.6
—
8.0
—
8.4
—
Vdc
Regline
—
—
7.0
2.0
160
80
—
—
7.0
2.0
160
80
mV
Regload
—
—
2.0
1.5
160
80
—
—
2.0
1.5
160
80
mV
IB
IB
—
5.5
8.0
—
5.5
8.0
mA
—
—
—
—
—
—
—
1.0
0.5
—
—
—
—
—
—
1.0
—
0.5
mA
RR
—
63
—
—
63
—
dB
Dropout Voltage (IO = 1.0 A, TJ = +25
°
C)
Output Noise Voltage (TA = +25
°
C)
10 Hz
≤
f
≤
100 kHz
VI – VO
Vn
—
2.0
—
—
2.0
—
Vdc
—
10
—
—
10
—
μ
V/VO
Output Resistance f = 1.0 kHz
rO
ISC
—
18
—
—
18
—
m
Short Circuit Current Limit (TA = +25
°
C)
Vin = 35 Vdc
—
0.2
—
—
0.2
—
A
Peak Output Current (TJ = +25
°
C)
Average Temperature Coefficient of Output Voltage
Imax
TCVO
—
2.2
—
—
2.2
—
A
—
–0.8
—
—
–0.8
—
mV/
°
C
NOTES:
1. Tlow= – 40
°
C for MCT78XXC
°
C for MCT78XXB
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.