SP6659EB Datasheet, PDF (1/3 Pages) Sipex Corporation – Evaluation Board Manual

SP6659EB
Evaluation Board Manual
Synchronous Buck regulator with
up to 94% efficiency
1.5MHz Constant frequency
operation
600mA Output Current
2.5V-5.5V Input Voltage range,
0.6V reference allow low output
voltage
No Schottky diode required
Current mode operation
Over-temperature protected
Low profile SOT23-5 Package &
Ceramic Capacitors for small,
low profile Power Supply
Ideal for PDAs, Digital Cameras,
Wireless Modems, Cellular
Telephones
DESCRIPTION
The SP6659 Evaluation Board is designed to help the user evaluate the performance
of the SP6659 for use as a single Li-Ion battery Step-Down DC-DC Converter. The
SP6659 operates from 2.5V to 5.5V input, with the highest efficiency in the range 3.0V
to 4.2V where the Li-Ion battery has the most energy. The SP6659EB evaluation board
is a complete power supply circuit to provide ease of evaluation for the DC/DC
Converter performance.
FIGURE 1. SP6659 1.8V OUTPUT EVALUATION BOARD SCHEMATIC
Vin=2.5-5.5V
U1 _{SP6659 L1 2.2 uH}
4 _VIN
SW ³
1
2
CIN
4.7uF
3
J1
1 _RUN
R1
200K
2
GND
VFB
5
VFB=0.6V
CF
100pF
R2
100K
Vout=1.8V
COUT
10uF
Rev 08/29/05
SP6659 Evaluation Board Manual Copyright Sipex Corporation