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TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
100 ppm/°C typical
Input to Output Capacitance
100 to 170 pF typical
Undervoltage Lockout
8 V input typical
Current Limit
125% of full load typical
Isolation
100 megohm minimum at 500 V
Audio Rejection 40 dB, typical
Conversion Frequency (kHz)
25°C, 300 min, 370 typ, 450 max
–55°C to +125°C
270 min, 370 typ, 470 max
Inhibit Pin Voltage (unit enabled)
7 to 12 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
12 to 50 VDC continuous
80 V for 120 msec transient
(70 V for 15 V single and dual models)
Case Operating Temperature (Tc)
–55°C to +125°C full power
–55°C to +135°C absolute
Derating Output Power/Current (Tc)
Linearly from 100% at 125°C to 0% at 135°C
ABSOLUTE MAXIMUM RATINGS
Input Voltage
12 to 50 VDC
Output Power
1.5 W
Capacitive Load
Single output models 200 μF
Dual output models 100 μF
Lead Soldering Temperature (10 sec per lead)
300°C
Storage Temperature Range (Case)
–65°C to +150°C
INHIBIT
2
MCH SERIES
1.5 WATT
DC/DC C
ONVERTERS
SINGLE OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
1
MCH2805S
MIN
TYP
4.95
4.80
—
300
MCH285R2S
MIN
TYP MAX
5.15
5.2
5.00
5.2
—
288
MCH2812S
MIN
TYP
5.25 11.88
5.40 11.52
0
—
MCH2815S
TYP MAX
15
15
100
CONDITIONS
Tc = 25°C
Tc = –55°C TO +125°C
V
IN
= 12 to 50 VDC
V
IN
= 12 TO 50 VDC
10 kHz - 2 MHz
Tc = –55°C TO +125°C
V
= 12 TO 50 VDC
Tc = –55°C TO +125°C
10% TO FULL LOAD
Tc = –55°C TO +125°C
50% TO FULL
Tc = –55°C TO +125°C
CONTINUOUS
TRANSIENT 120 ms
NO LOAD
Tc = –55°C TO +125°C
FULL LOAD
Tc = –55°C TO +125°C
INHIBITED
Tc = –55°C TO +125°C
10k Hz - 10 MHz
Tc = –55°C TO +125°C
Tc = 25°C
Tc = –55°C TO +125°C
POWER DISSIPATION
Tc = –55°C TO +125°C
RECOVERY
Tc = -–55°C TO +125°C
50 %–100%– 50% LOAD
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
Tc =–55°C TO +125°C
12 TO 50 TO 12 V
IN
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
Tc = –55°C TO +125°C
DELAY
Tc = –55°C TO +125°C
OVERSHOOT
Tc = –55°C TO +125°C
MAX
5.05
5.20
0
MAX
12.12 14.85
12.48 14.40
0
MIN
UNITS
5
5
12
12
125
15.15
15.60
mA
VDC
OUTPUT CURRENT
—
OUTPUT POWER
0
—
1.5
0
—
1.5
0
—
1.5
0
—
1.5
W
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
72
69
—
—
—
—
45
65
35
40
350
380
100
115
28
—
5.5
6.0
70
73
2.3
2.4
100
130
77
75
1.3
1.4
3.0
3.5
150
300
100
120
700
800
200
300
50
80
10
11
74
78
3.2
3.5
200
250
—
—
2.0
2.3
12
15
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
72
69
—
—
—
—
45
65
35
40
350
380
100
115
28
—
5.5
6.0
70
73
2.3
2.4
100
130
77
75
1.3
1.4
3.0
3.5
150
300
100
120
700
800
200
300
50
80
10
11
74
78
3.2
3.5
200
250
—
—
2.0
2.3
12
15
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
74
72
—
—
—
—
50
70
60
70
600
640
145
160
28
—
6.0
6.5
68
70
2.3
2.4
100
150
79
77
2.0
2.2
3.5
3.5
200
300
200
250
1300
1400
300
400
50
80
10
12
72
74
3.2
3.5
200
250
—
—
3.2
3.5
15
20
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
74
72
—
—
—
—
35
50
70
80
700
760
165
185
28
—
6.0
6.5
68
70
2.3
2.4
100
150
79
77
2.3
2.5
4.0
4.0
150
250
300
350
1500
1600
350
450
50
70
11
12
72
74
3.2
3.5
200
250
—
—
3.7
4.0
18
20
mV p-p
mV
LOAD REGULATION
mV
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
VDC
V
mA
INPUT RIPPLE
CURRENT
2
EFFICIENCY
mA p-p
%
LOAD FAULT
3, 4
W
ms
STEP LOAD
RESPONSE
5
–400
–500
—
—
185
185
125
125
400
500
500
600
–400
–500
—
—
185
185
125
125
400
500
500
600
–700
–800
—
—
350
380
130
130
700
800
500
600
–700
–800
—
—
350
380
140
180
700
800
600
750
mV pk
μs
STEP LINE
RESPONSE
5
–400
–500
—
—
—
—
—
—
170
180
0.75
0.75
7
10
0
0
400
500
3.0
4.0
20
40
100
150
–400
–500
—
—
—
—
—
—
170
180
0.75
0.75
7
10
0
0
400
500 –1000 400
3.0
—
4.0
—
20
—
40
—
100
—
150
—
–900
400
900
1000 –850
2.5
3.0
20
40
250
350
–750
400
450
0.47
0.5
7
10
0
0
750
850
2.0
2.5
20
40
300
450
mV pk
0.6
0.6
7
10
0
0
—
—
—
—
—
—
ms
START-UP
0 TO 28 VDC
ms
mV pk
Inhibit – TTL Open Collector
Logic low (output disabled) 0.8 V max
Inhibit pin current 1 mA max
Referenced to input common
Logic high (output enabled) open collector
See notes 1, 2, 3, 4, 5, and 6 on the following page.
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.