MCH SERIES
1.5 WATT
DC/DC CONVERTERS
TYPICAL CHARACTERISTICS
INHIBIT
ABSOLUTE MAXIMUM RATINGS
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
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
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
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
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MODELS
MCH2805S
MCH285R2S
MCH2812S
MCH2815S
PARAMETER
OUTPUT VOLTAGE
CONDITIONS
Tc = 25°C
Tc = –55°C TO +125°C 4.80
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNITS
1
4.95
5
5
5.05 5.15 5.2 5.25 11.88 12 12.12 14.85 15 15.15
5.20 5.00 5.2 5.40 11.52 12 12.48 14.40 15 15.60
VDC
OUTPUT CURRENT
OUTPUT POWER
V
= 12 to 50 VDC
—
300
0
—
288
0
—
125
0
—
100 mA
IN
V
= 12 TO 50 VDC
0
—
1.5
0
—
1.5
0
—
1.5
0
—
1.5
W
mV p-p
mV
IN
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
10 kHz - 2 MHz
Tc = –55°C TO +125°C
= 12 TO 50 VDC
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
72
69
—
—
—
—
45
65
35
40
150
300
100
120
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
72
69
—
—
—
—
45
65
35
40
150
300
100
120
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
74
72
—
—
—
—
50
70
60
70
200
300
200
250
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
74
72
—
—
—
—
35 150
50 250
70 300
80 350
700 1500
760 1600
165 350
185 450
V
IN
Tc = –55°C TO +125°C
10% TO FULL LOAD
Tc = –55°C TO +125°C
50% TO FULL
LOAD REGULATION
350 700
380 800
100 200
115 300
28
—
5.5
6.0
70
73
2.3
2.4
100 200
130 250
77
75
350 700
380 800
100 200
115 300
28
—
5.5
6.0
70
73
2.3
2.4
100 200
130 250
77
75
600 1300
640 1400
145 300
160 400
28
—
6.0
6.5
68
70
2.3
2.4
100 200
150 250
79
77
mV
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
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
50
80
10
11
74
78
3.2
3.5
50
80
10
11
74
78
3.2
3.5
50
80
10
12
72
74
3.2
3.5
28
—
6.0
6.5
68
70
50
70
11
12
72
74
VDC
V
mA
2.3 3.2
2.4 3.5
100 200
150 250
INPUT RIPPLE
mA p-p
%
2
CURRENT
EFFICIENCY
—
—
—
—
—
—
79
77
—
—
3, 4
LOAD FAULT
1.3
1.4
3.0
3.5
2.0
2.3
12
15
1.3
1.4
3.0
3.5
2.0
2.3
12
15
2.0
2.2
3.5
3.5
3.2
3.5
15
20
2.3 3.7
2.5 4.0
W
4.0
4.0
18
20
ms
Tc = -–55°C TO +125°C
STEP LOAD
5
50 %–100%– 50% LOAD
TRANSIENT
RESPONSE
–400 185 400 –400 185 400 –700 350 700 –700 350 700
mV pk
µs
Tc = –55°C TO +125°C –500 185 500 –500 185 500 –800 380 800 –800 380 800
RECOVERY
—
—
125 500
125 600
—
—
125 500
125 600
—
—
130 500
130 600
—
—
140 600
180 750
Tc =–55°C TO +125°C
STEP LINE
5
12 TO 50 TO 12 V
IN
RESPONSE
TRANSIENT
–400 170 400 –400 170 400 –900 400 900 –750 400 750
mV pk
ms
Tc = –55°C TO +125°C –500 180 500 –500 180 500 –1000 400 1000 –850 450 850
RECOVERY
Tc = –55°C TO +125°C
DELAY
—
—
—
—
—
—
0.75 3.0
0.75 4.0
—
—
—
—
—
—
0.75 3.0
0.75 4.0
—
—
—
—
—
—
0.6
0.6
7
2.5
3.0
20
—
—
—
—
—
—
0.47 2.0
0.5 2.5
START-UP
0 TO 28 VDC
7
10
0
20
40
7
10
0
20
40
7
10
0
20
40
ms
Tc = –55°C TO +125°C
OVERSHOOT
Tc = –55°C TO +125°C
10
0
0
40
250
350
100
150
100
150
300
450
mV pk
0
0
0
See notes 1, 2, 3, 4, 5, and 6 on the following page.
2
CRANE [ Crane Aerospace & Electronics. ]
