1
DESCRIPTION
The
SP6651A Evaluation Board
is designed to help the user evaluate the performance
of the SP6651A for use as a single Li-Ion battery Step-Down DC-DC Converter. The
SP6651A operates from 2.7V to 6.5V input, with the highest efficiency in the range 3.0V
to 4.2V where the Li-Ion battery has the most energy. The SP6651A evaluation board
is a complete power supply circuit to provide ease of evaluation for the DC/DC
Converter performance.
FIGURE 1. SP6651A
3.3V OUTPUT
EVALUATION BOARD SCHEMATIC
High Efficiency Synchronous
Step-Down Converter with up to
98% efficiency
800mA Output Current, only
20uA Quiescent Current
2.7V-6.5V Input Voltage range,
Output Adjustable down to 0.8V
MSOP Package & Ceramic
Capacitors for small, low profile
Power Supply
Ideal for PDAs, Digital Cameras,
Wireless Modems, Cellular
Telephones
SP6651EB
Evaluation Board Manual
BLON
D0
CVIN
1.0uF
RVIN
10.0
SP6651A
U1
1
2
3
4
5
6
7
8
9
10
PVin
Vin
BLON
D1
D0
FB
Vout
GND
PGND
LX
3
J2
L1
10uH
CIN
22uF
1
1
2
CF
22pF
3
D1
RI
261K
COUT
22uF
Vout 3.3V 800mA
RF
825K
2
Vin 2.7 - 6.5VDC
J1