SP6655EB
Evaluation Board Manual
High Efficiency Synchronous
Step-Down Converter with up to
98% efficiency
400mA Output Current, only
20uA Quiescent Current
2.7V-6.5V Input Voltage range,
Output Adjustable down to 0.8V
DFN Package & Ceramic
Capacitors for small, low profile
Power Supply
Ideal for PDAs, Digital Cameras,
Wireless Modems, Cellular
Telephones
DESCRIPTION
The
SP6655 Evaluation Board
is designed to help the user evaluate the performance
of the SP6655 for use as a single Li-Ion battery Step-Down DC-DC Converter. The
SP6655 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 SP6655EB evaluation board
is a complete power supply circuit to provide ease of evaluation for the DC/DC
Converter performance.
FIGURE 1. SP6655 1.8V OUTPUT
EVALUATION BOARD SCHEMATIC
Vin = 2.7V to 5.0V
CIN
RVIN
10.0
1
2
1
3
4
5
10uF
BLON
U1
SP6655
PVin
Vin
BLON
D1
D0
LX
PGND
GND
Vout
FB
10
9
8
7
6
L1
10uH
Vout = 1.8V
CF
22pF
RF
249K
D1
2
3
1
RI
200K
CVIN
1.0uF
COUT
10uF
D0
2
3
1
2
3
4
