Rev. 3/23/01

SP6650 Evaluation Board Manual

© Copyright 2001 Sipex Corporation

1

DESCRIPTION

s High efficiency synchronous step-

down converter with up to 95%

efficiency

s Ideal for cellular telephones, wireless

modems, PDAs, digital cameras

s Programmable inductor peak current

limit, 2.7V-6.5V input voltage range

s MSOP package & SMT components

for small, low profile power supply

s Easy evaluation for different distrib-

uted power systems and battery-

powered portable equipment

SP6650 Evaluation

Board Manual

®

The SP6650 Evaluation Board is designed to help the user evaluate the performance of the

SP6650 for use as a single Li-Ion battery input to +5V output DC-DC Converter. The SP6650

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 SP6650UEB evaluation board is a complete power

supply circuit to provide ease of evaluation for the DC/DC Converter performance.

The evaluation board is a completely assembled and tested surface mount board which provides

easy probe access points to all SP6650 inputs and outputs so that the user can quickly connect

and measure electrical characteristics and waveforms.

The next two sections describe the SP6650 board layout and using the SP6650 evaluation

boards. A table of SP6650 pin assignments is also included with details on input/output pin

function. A SP6650 evaluation board list of materials table is provided with some manufacturers

part numbers to use as a reference. Finally, a schematic and drawings of the PC layout are

included as a design-in tool for the user of the SP6650.

BOARD SCHEMATIC AND LAYOUT

The SP6650 Evaluation Board has been designed for easy and convenient access to all Inputs

and Outputs of the SP6650 device under test. Position the board with the silkscreen lettering

upright, (also see the drawing on the front page of this manual) and you will see the SP6650

and resistors forming the switched DC-DC Converter circuit.