Rev. 5/23/01

SP6122 Evaluation Board Manual

© Copyright 2001 Sipex Corporation

1

DESCRIPTION

The SP6122 Evaluation Board is designed to help the user evaluate the performance

of the SP6122 for use as a low voltage input, low voltage output PFET Buck DC-DC

Controller. The SP6122 operates from a 5V or 3.3V input supply, and delivers output

voltages as low as 1.5V with an accuracy of 1.5% over line, load and temperature.

Unlike other “Micro-8” parts, the SP6122 has an array of value added features for you to

evaluate including: optional hiccup mode, over-current protection and fault flag output.

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

supply board which provides easy access to the SP6122 Input and Outputs so that the

user can quickly measure electrical characteristics and waveforms.

The next two sections describe the SP6122 Board Layout and Using the SP6122

Evaluation Boards. A section on SP6122 Power Supply Data is also included with

graphs on Efficiency, Line and Load Regulation. Then, drawings of the PC Layout and

a schematic are included as a design-in tool for the user of the SP6122. Finally, a

SP6122 Evaluation Board List of Materials table is provided with some manufacturers

part numbers to use as a reference.

BOARD LAYOUT

The SP6122 Evaluation Board has been designed for quick and easy connection to

the Input and Output of the SP6122 Power Supply 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 U1 the SP6122 8-pin

µSOIC, in the center left of the board. To the left

of U1 are the output capacitor Cout and the Vout pin. To the right of U1 are Q1 and the

Vin post and the input capacitor Cin. Below Cin and Cout are the two GND posts.

§ Easy Evaluation for the

SP6122 Low Voltage PFET

Buck Converter

§ Ideal for 1A to 5A, Small

Footprint, DC-DC Power

Converters

§ Very Accurate 1.5%

Reference over Line, Load,

Temperature

§ Small Micro 8 Package

SP6122

Evaluation Board Manual