SP6641A/6641B
Low Noise Evaluation Board
Easy Evaluation for the
SP6641A/6641B Single or
Dual Cell Alkaline to 3.3V or
5V Output
SP6641B provides up to
500mA output current with
less than 50mVpp ripple
High Efficiency: up to 87%
SOT23-5 Package & SMT
components for small, low
SP6641A/6641B Evaluation Board Schematics
J1
SHDN
1
2
3
4
SP6641A 1 OR 2 CELL BOOST
U1 SP6641A
SHDN
VOUT
GND
5
VBATT
LX
3
2
1
1uF Cer.
C3
C2
VOUT
VBATT
0.9V to 3.3V
C1
22uF
Ceramic
L1
22uH
D1
SCHOTTKY DIODE
22uF
Ceramic
J1
SHDN
1
2
3
4
SP6641B 2 CELL BOOST
U1 SP6641B
SHDN
VOUT
GND
5
VBATT
LX
3
2
1
1uF Cer.
C3
C2
330uF
40mohm
D1
L2
VOUT
VBATT
1.8V to 3.3V
C1
100uF
80mohm
L1
10uH
SM Bead
VFILTER
C4
10uF Ceramic
SCHOTTKY DIODE