Rev. 6/27/01

SP6680 Evaluation Board Manual

© Copyright 2001 Sipex Corporation

1

DESCRIPTION

The SP6680 Evaluation Board is designed to help the user evaluate the performance

of the SP6680 for use as a single Li-Ion battery input to +5V output DC-DC Converter.

The SP6680 operates from 2.7V to 6.3V input, with the highest efficiency in the range

3.0V to 4.2V where the Li-Ion battery has the most energy. The SP6680UEB

evaluation board is a complete power supply circuit with +5V LDO Regulator to provide

ease of use to evaluate system DC/DC Converter performance.

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

provides easy probe access points to all SP6680 Inputs and Outputs so that the user

can quickly connect and measure electrical characteristics and waveforms.

The next two sections describe the SP6680 Board Layout and Using the SP6680

Evaluation Boards. A table of SP6680 Pin Assignments is also included with details on

input/output pin function. A SP6680 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 SP6680.

BOARD LAYOUT

The SP6680 Evaluation Board has been designed for easy and convenient access to

all Inputs and Outputs of the SP6680 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 SP6680

µSOIC, labeled U1 in the left center of the board, and

surrounding it the Capacitors Cin, CF1, CF2 and Cout forming the switched capacitor

DC-DC Converter circuit. On the right is U2, the LDO, in a small SOT23-5 package

providing a low-noise, regulated +5V output.

§ Easy Evaluation for the

SP6680 Li-Ion Battery to 5V

Inductorless Converter

§ Ideal for SIMM Card Power

Supply Applications in

Cellular Phones

§ High Efficiency: 80 to 95%

with Li-Ion Battery

§

µSOIC Package & SMT

components for small, low

profile Power Supply

SP6680

Evaluation Board Manual