SP6654EB
Evaluation Board Manual
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
碌SOIC
Package & DFN
Ceramic Capacitors for
small, low profile Power
Supply
DESCRIPTION
The
SP6654 Evaluation Board
is designed to help the user evaluate the performance
of the SP6654 for use as a single Li-Ion battery Step-Down DC-DC Converter. The
SP6654 operates from 2.7V to 5.5Vinput, with the highest efficiency in the range 3.0V to
4.2V where the Li-Ion battery has the most energy. The SP6654EB evaluation board is
a complete power supply circuit to provide ease of evaluation for the DC/DC Converter
performance.
FIGURE 1. SP6654 3.3V OUTPUT
EVALUATION BOARD SCHEMATIC
Vin 2.7 - 5.5VDC
CIN
22uF
RVIN
10.0
1
2
1
3
4
5
PWRGD
U1
SP6654
PVin
Vin
LX
PGND
10
9
8
7
6
L1
10uH
Vout 3.3V 800mA
RF
825K
PWRGD GND
D1
D0
Vout
FB
D1
2
3
1
CF
22pF
COUT
22uF
RI
261K
D0
2
3
CVIN
1.0uF
Date: 02/18/05
SP6654 Evaluation Board Manual
Copyright Sipex Corporation
1
2
3
4
