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TO220-3/TO263-3 VOLTAGE REGULATOR
EVALUATION BOARD USER ’S GUIDE
Chapter 2. Installation and Operation
2.1
2.2
2.3
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.
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
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 5 and R 6 .
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.
? 2009 Microchip Technology Inc.
DS51818A-page 7
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