User manual

TO220-3/TO263-3 VOLTAGE REGULATOR

EVALUATION BOARD USER’S GUIDE

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The TO220-3/TO263-3 Voltage Regulator Evaluation Board is designed to be used to

facilitate evaluation of Microchip’s voltage regulators or to be used as a stand-alone

voltage regulator board. Jumpers have been placed on the board to facilitate testing of

specific voltage regulator parameters.

The TO220-3/TO263-3 Voltage Regulator Evaluation Board kit comes with a 1 uF

ceramic input and output capacitor soldered to the board. The board has two

unpopulated resistor locations that may be used for loads. The board also has one

unpopulated output capacitor location that may be populated with a through-hole radial

lead capacitor.

2.2 FEATURES

The TO220-3/TO263-3 Voltage Regulator Evaluation Board has the following features:

• Input and Output headers for future connection to Line Step and Load Step

modules

• Ample testpoints to attach multimeters, power supplies, and loads

• Jumper to select ground current measurement

• Jumpers to connect output load resistors

• Jumper to connect input capacitor to circuit

• Footprint for an additional through-hole radial lead output capacitor

2.3 GETTING STARTED

The TO220-3/TO263-3 Voltage Regulator Evaluation Board is fully assembled and

tested. All that is required for operating is a user supplied voltage regulator and a

supply voltage source. Some of the tests that may be completed using the

TO220-3/TO263-3 Voltage Regulator Evaluation Board shall now be described.

2.3.1 Ground Current and Quiescent Current

When measuring ground current, jumper JP3 should be removed, otherwise leave

jumper JP3 on. To measure ground current, perform the following steps:

1. Add desired load resistors to R

and R

2. Remove jumpers JP3, JP4 and JP5.

3. Connect an ammeter across testpoints TP6(+) and TP7(-). Select appropriate

meter scale for device being evaluated.

4. Connect a voltmeter across testpoints TP9(+) and TP10(-).

5. Add jumper JP1.

6. Apply source voltage to testpoints TP1(+) and TP2(-).

7. Verify the voltage across testpoints TP10 and TP9 is within the expected range

of the device being tested.