SOT223-3EV-VREG Microchip Technology, SOT223-3EV-VREG Datasheet - Page 11

• Manufacturer Part Number: SOT223-3EV-VREG
• Description: BOARD EVAL SOT223-3 VOLTAGE REG
• Manufacturer: Microchip Technology

Specifications of SOT223-3EV-VREG

• Channels Per Ic: 1 - Single
• Regulator Type: Positive Fixed
• Board Type: Partially Populated
• Utilized Ic / Part: SOT-23-3 Package
• Silicon Manufacturer: Microchip
• Application Sub Type: Voltage Regulator
• Kit Application Type: Power Management - Voltage Regulator
• Silicon Core Number: MCP1791, MCP1824, MCP1825, MCP1826
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Output: -
• Voltage - Input: -
• Operating Temperature: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

2.1
2.2
2.3
© 2008 Microchip Technology Inc.
INTRODUCTION
FEATURES
GETTING STARTED
Chapter 2. Installation and Operation
The SOT223-3 Voltage Regulator Evaluation Board is designed 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 ease the test of the specific voltage
regulator parameters.
The SOT223-3 Voltage Regulator Evaluation Board kit comes with a 1 μF ceramic input
and output capacitor soldered to the board. The board has two unpopulated resistor
locations that may be used for loads.
The SOT223-3 Voltage Regulator Evaluation Board has the following features:
• Input and Output headers for future connection to Line Step and Load Step
• Ample testpoints to attach multimeters, power supplies, and loads
• Jumper to select ground current measurement
• Jumper to select two different load resistors
• Jumper to connect input capacitor to circuit
The SOT223-3 Voltage Regulator Evaluation Board is fully assembled and tested. For
operating, a user supplied voltage regulator and a supply voltage source are required.
Some of the tests that may be completed using the SOT223-3 Voltage Regulator
Evaluation Board are described in the next subchapters.
2.3.1
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 R5 and R6.
2. Remove jumpers JP3, JP4, and JP5.
3. Connect an ammeter across testpoints TP6(+) and TP7(-). Select the
4. Connect a voltmeter across testpoints TP9(+) and TP10(-).
5. Add jumper JP1.
6. Apply source voltage to testpoints TP1(+) and TP2(-).
7. Verify that the voltage across testpoints TP9 and TP10 is within the expected
8. Read the Ground Current directly from the ammeter connected to the testpoints
9. Vary the input voltage to obtain data for ground current versus input voltage. If no
modules
appropriate meter scale for the device that is being evaluated.
range of the tested device.
TP6 and TP7.
load is attached to the output of the voltage regulator, the measured “ground
current” is also called the “quiescent current” of the regulator.
Ground Current and Quiescent Current
EVALUATION BOARD USER’S GUIDE
SOT223-3 VOLTAGE REGULATOR
DS51779A-page 7