2018.05.22
01
1
MUN12AD03-SE EVB Guide
40%
45%
50%
55%
60%
65%
70%
75%
80%
85%
90%
95%
100%
0.01 0.1 1
Efficiency (%)
Load current (A)
Vout=3.3V
Vout=1.8V
Vout=1.5V
Vout=1.2V
Vout=1.0V
DESCRIPTION:
The evaluation board is for the MUN12AD03-SE, high efficiency DC/DC power module. The
evaluation board is generates a +3.3V output voltage at load currents up to 3A. The output
voltage can be programmed by the dividing resistor (R
FB_T
and R
FB_B
). The MUN12AD03-SE
switches at 1MHz and achieve up to 91% efficiency with the supplied components.
ELECTRICAL SPECIFICATION:
Parameters
Symbol
Value
Unit
Input Voltage Range
VIN
4.5~17
V
Output Voltage
VOUT
1.0~3.3
V
Output Current
IOUT
3
A
EVALUATION BOARD & EFFICIENCY::
QUICK START:
The module has an internal 0.6V±1.5% reference voltage. The output voltage can be programmed by
the dividing resistor (R
FB_T
and R
FB_B
). The output voltage can be calculated by Equation 1, resistor
choice may be referred to TABLE 1.
FB_B
FB_T
R
R
16.0(V) VOUT
(EQ.1)
TABLE 1 Resistor values for common output voltages
VOUT
1.0V
1.2V
1.5V
1.8V
3.3V
R
FB_T
(Ohm)
124k
124k
124k
124k
124k
R
FB_B
(Ohm)
182k
124k
82.5k
61.9k
27.4k
2018.05.22
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MUN12AD03-SE EVB Guide
EVALUATION BOARD SCHEMATIC:
BILL OF MATERIALS:
COUNT
REF DES
DESCRIPTION
PART NUMBER
MFR
1
C2
MLCC,10uF/25V 1206 X5R
TMK316BBJ226ML-T
Taiyo
1
C3
MLCC,47uF/6.3V 0805 X7R
GRM219R60J476ME44
Murata
0
C1,C4,C5
DXP
2
R1,R2
Resistor,100k Ohm,±1%,0402
Std
Cyntec
2
R3,R6
Resistor,124K Ohm,±1%,0402
Std
Cyntec
0
R4
DXP
1
R5
Resistor,182k Ohm,±1%,0402
Std
Cyntec
1
R7
Resistor,82.5k Ohm,±1%,0402
Std
Cyntec
1
R8
Resistor,61.9k Ohm,±1%,0402
Std
Cyntec
1
R9
Resistor,27.4k Ohm,±1%,0402
Std
Cyntec
1
U2
Power module, 3.0*2.8*1.5mm
MUN12AD03-SE
Cyntec