SP6656EB Datasheet, PDF (1/4 Pages) Sipex Corporation – Evaluation Board Manual

SP6656EB
Evaluation Board Manual
High Efficiency Synchronous
Step-Down Converter with up to
98% efficiency
400mA Output Current, only
20uA Quiescent Current
2.9V-5.5V Input Voltage range,
Output Adjustable down to 1.0V
Small 2.5x2.4mm DFN Package
& Ceramic Capacitors for small,
low profile Power Supply
Ideal for PDAs, Digital Cameras,
Wireless Modems, Cellular
Telephones
DESCRIPTION
The SP6656 Evaluation Board is designed to help the user evaluate the performance
of the SP6656 for use as a single Li-Ion battery Step-Down DC-DC Converter. The
SP6656 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 SP6656EB evaluation board
is a complete power supply circuit to provide ease of evaluation for the DC/DC
Converter performance.
FIGURE 1. SP6656 1.8V OUTPUT EVALUATION BOARD SCHEMATIC
Vin = 2.7V to 5.0V
OVSO
1
OVSI ²
3
1
EN ²
3
RVIN
10.0
CVIN
1.0uF
CIN
10uF
U1 SP6656
1 _PVin
2 _Vin
3 _OVSO
4 _OVSI
5 _EN
LX ¹⁰
PGND ⁹
GND ⁸
Vout ⁷
FB ⁶
Rs
200K
L1 _10uH ^{Vout = 1.8V (OVSI=L) or 2.8V (OVSI=H)}
CF
120pF
RF
249K
RI
200K
COUT
10uF
USING THE EVALUATION BOARD
Rev 10/17/05
SP6655 Evaluation Board Manual
Copyright © Sipex Corp.