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Single Output
DC/DC Converter
FEATURES:
3 Pin SIP Package
Pin-out compatible with LM78XX Linear Regulators
Continuous Short Circuit Protection
Non-Isolated Regulated Output
Operating temperature -40°C to +85°C
Wide input range
Very High Efficiency Up To 95%
Low ripple and noise
Series M-78B-NZ
Up to 9.75 Watt | DC-DC Converter
Models
Model
Input Voltage
(V)
Output Voltage
(V)
Output Current
max (A)
Efficiency
Vin Min
(%)
88
91
93
95
Efficiency
Vin Max
(%)
85
88
91
93
M-78B2.5-NZ
M-78B3.3-NZ
M-78B5.0-NZ
M-78B6.5-NZ
4.75-18
4.75-18
6.5-18
8-18
2.5
3.3
5
6.5
1.5
1.5
1.5
1.5
NOTE: All specifications in this datasheet are measured at an ambient temperature of 25°C, humidity<75%, nominal input voltage and at
rated output load unless otherwise specified.
Input Specifications
Input Specifications
Voltage range
Filter
Quiescent Current
Short Circuit consumption
Nominal
Typical
See the table above
Capacitor
5
0.5
Maximum
Units
VDC
Vin=(LL-HL) at full load
10
1.8
mA
W
Output Specifications
Output Specifications
Voltage accuracy
Short Circuit protection
Short circuit restart
Output current limit
Thermal shutdown
Dynamic load stability
Line voltage regulation
Load voltage regulation
Temperature coefficient
Ripple & Noise
Maximum Capacitive Load
Conditions
100% load
Typical
±3
Continuous.
Auto recovery
Maximum
Units
%
5
Internal IC junction
10-100% load
Vin=(LL-HL) at full load
10-100% load
-40°C to +85°C ambient
20MHz Bandwidth
150
±100
±0.75
±1
±0.02
45
1000
A
ºC
mV
%
%
o
%/ C
mV p-p
µF
General Specifications
Input Specifications
Switching frequency
Operating temperature
Storage temperature
Max Case temperature
Cooling
Humidity
Case material
Weight
Dimensions
(L x W x H)
MTBF
Soldering Temperature
Conditions
100% load
With derating above 71°C
Typical
340
-40 to +85
-55 to +125
Maximum
Units
KHz
o
C
o
C
o
C
%
g
o
100
Free air convection
95
Non-conductive black plastic (UL94-V0 rated)
4
0.45 X 0.35 X 0.69 inch
11.50 X 8.90 X 17.50 mm
> 2 000 000 hrs (MIL-HDBK-217F, Ground Benign, t=+25°C)
1.5 mm from case for 10 sec
300
C
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Pin Out Specifications
Pin
1
2
3
Single
+Vin
GND
+Vout
Dimensions
8.90
(0.35)
Footprint
2.54
(0.10)
Front
View
11.50
(0.45
Ø 1.0 +0.15/-0
(Ø 0.04 + 0.006/-0
Make-Ps
17.50
(0.69)
Side
View
0.50
(0.024)
2.54
(0.10)
DIV: 2.54 (0.1)
1
4.10
(0.16)
2
3
0.50
(0.024)
2.54
(0.10)
Dimensions are typical values: mm (inch)
General Tolerance: ± 0.25 (± 0.01)
Pin Tolerance: ± 0.1 (± 0.004)
0.30
(0.012)
Bottom
View
2.15
(0.09)
3.21
(0.13)
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Derating
Free Air Convection
71º C
100
Output Power (%)
80
Safe Operating Area
60
40
20
0
- 40
- 20
0
20
40
60
80
85
100
Ambient Temperature
º C
Typical Application Circuits
M-78B-Z
C1: A low ESR capacitor is required to keep the noise of the converter to a minimum. Ceramic capacitors are recommended
with typical value is 10µF / 25V.
C2: Installation of C2 is recommended with typical value of 22µF / 16V ceramic for 5V and 6.5V output signal and 22µF /
6.3V ceramic for 2.5V and 3.3V output signal.
NOTE: This part is not designed for parallel operation.
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Dual Output Connection
+Vin
C1
10uF
GND
1
M-78B-Z
2
3
+Vout
C2
22uF
GND
1
C1
M-78B-Z
2
10uF
Input Filter
3
C2
22uF
-Vout
M-78B-Z
Output Filter
10uH ~ 47uH
1
C1
10uF
GND
M-78B-Z
3
C1
10uF
C1
10uF
+Vout
C2
22uF
GND
2
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