EVNB679, SYNCHRONOUS 5VOUT STEP-DOWN CONVERTER EV BOARD
PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE
EVALUATION BOARD SCHEMATIC
VIN_SENSE
VIN
VOUT_SENSE
VOUT
VCC
PG
VCC
PG
R4
NS
R3
3.3
BST
C3
220nF
U1
SW
L1
SW
1.5uH
VOUT
VIN
VIN
1
4
7
SW
VOUT
VIN
NC
SW
EN
C9
NS
EN
NB679
R1
5
2
VOUT
1.5M
VOUT
C7
100nF
ENLDO
R8
NS
EN
11
PGND
ENLDO
EN
PGND
AGND
GND
LDO6
10 AGND
LDO
GND
R2
GND
NS
LDO
LDO
GND
C4
4.7uF
PG
GND3
R7
100K
GND
GND
C5
1uF
GND4
GND5
GND
GND
ETCH
AGND
1
2
ETCH
GND
AGND
The AGND should be separate to PGND
in all the conditions unless they are
finally connected together to VCC Cap
GND6
GND
EVNB679 Rev. 1.0
11/14/2014
Preliminary Specifications Subject to Change
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