CYNTEC MUN3CAD03-SF User manual

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1
MUN3CAD03-SF EVB GUIDE
ELECTRICAL SPECIFICATION:
Parameters
Symbol
Value
Note
Input Voltage
VIN
2.75V~5.5V
Output Voltage
VOUT
Adjust
Output Current
IOUT
3A
Enable Voltage
EN
1.2V~5V
External VDD
VDD
3.3V~5V
PROGRAMMING OUTPUT VOLTAGE:
(EQ.1)
Assume RFB_top set 200 Kohm, the resistance according to typical output voltage is shown in table 1
Vout
1V
1.2V
1.8V
2.5V
3.3V
RFB (Ohm)
300k
200k
100k
63.4k
44.2k
TABLE 1: OUTPUT VOLTAGE SETTING
LOAD TRANSIENT RESPONSE INCREASE:
In some applications, adding a ceramic cap (CFB) in parallel with RFB-top may further speedy up the
load transient responses, recommend capacitance as below table 2.
Vout (V)
CFB (pF)
1.0
22~100
1.2
22~100
1.8
22~100
2.5
22~47
3.3
22
TABLE.2 RECOMMEND CFB FOR LOAD TRANSIENT








BOTFB
TOPFB
OUT R
R
VV
_
_
16.0)(

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MUN3CAD03-SF EVB GUIDE
EVALUATION BOARD SCHEMATIC:
QUICK START GUIDE:
1. Power the MUN3CAD03-SF module on while Disable jump open.
2. Short S1~S6 can set output voltage from 1.0V to 3.3V
S1
S2
S3
S4
S5
S6
Vout
1V
1.2V
1.8V
2.5V
3.3V
N.C
3. Short Disable jump can be turn off Power module.

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QUICK START GUIDE (cont.):

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MUN3CAD03-SF EVB GUIDE
PRIENTED CIRCUIT BOARD LAYOUT:
Top Layer Mid 1 Layer
Mid 2 Layer Bottom Layer

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MUN3CAD03-SF EVB GUIDE
BOM LIST:
COUNT
REF DES
DESCRIPTION
PART NUMBER
MFR
1
C1
MLCC, 47uF, 6.3V, X5R, 0805
GRM21BR60J476ME15
Murata
1
C2
MLCC, 22uF, 6.3V, X5R, 0805
GRM21BR60J226ME39
Murata
1
C3
MLCC, 22pF, 50V, C0G, 0402
GRM1555C1H220JA01
Murata
0
C4
MLCC, TBD
TBD
TBD
1
R1
Resistor, 100kOhm, ±1%, 0402
Std
Std
1
R2
Resistor, 100kOhm, ±1%, 0402
Std
Std
1
R3
Resistor, 200kOhm, ±1%, 0402
Std
Std
1
R4
Resistor, 300kOhm, ±1%, 0402
Std
Std
1
R5
Resistor, 200kOhm, ±1%, 0402
Std
Std
1
R6
Resistor, 100kOhm, ±1%, 0402
Std
Std
1
R7
Resistor, 63.4kOhm, ±1%, 0402
Std
Std
1
R8
Resistor, 44.2kOhm, ±1%, 0402
Std
Std
0
R9
N.C
-
-
0
L1
Inductance, TBD
TBD
TBD
6
S1, S2, S3,
S4, S5, S6
Jump, pitch 2.54mm
Std
Std
1
Disable(S7)
Jump, pitch 2.54mm
Std
Std
1
U1
Power module, 3.0*3.0*1.3mm
MUN3CAD03-SF
Cyntec

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MUN3CAD03-SF EVB GUIDE
REVISION HISTORY:
Date
Revision
Changes
2017.08.08
00
Issue initial preliminary EVB guide.