SP6651EB Datasheet, PDF (1/5 Pages) Sipex Corporation – Evaluation Board Manual

SP6651EB
Evaluation Board Manual
ƒ High Efficiency Synchronous
Step-Down Converter with up to
98% efficiency
ƒ 800mA Output Current, only
20uA Quiescent Current
ƒ 2.7V-6.5V Input Voltage range,
Output Adjustable down to 0.8V
ƒ MSOP Package & Ceramic
Capacitors for small, low profile
Power Supply
ƒ 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 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
Vin 2.7 - 6.5VDC
CIN
22uF
BLO N
1
D1 ^J1
2
3
1
D0 ^J2
2
3
RV IN
10.0
CV IN
1.0uF
U1
1
PV in
10
LX
2 _{V in PGND} 9
3
8
BLON GND
4 _D1
V out ⁷
5 _D0
FB ⁶
SP6651A
L1 _10uH
Vout 3.3V 800mA
CF
22pF
RF
825K
RI
261K
COUT
22uF
1