SP6651AEU
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
µSOIC
Package & Ceramic
Capacitors for small, low profile
Power Supply
Ideal for PDAs, Digital Cameras,
Wireless Modems, Cellular
Telephones
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 SP6651AEU 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
Vin 2.7 - 6.5VDC
CIN
22uF
RVIN
10.0
BLON
1
2
1
3
4
5
U1
PVin
Vin
BLON
D1
D0
LX
PGND
GND
Vout
FB
10
9
8
7
6
L1
10uH
Vout 3.3V 800mA
RF
825K
CF
22pF
D1
J1
2
3
COUT
22uF
RI
261K
1
SP6651A
CVIN
1.0uF
D0
J2
2
3
SIPEX [ SIPEX CORPORATION ]
