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SOT-223-5 Voltage Regulator Evaluation Board User’s Guide
1.2.3
Shutdown Control
Jumper JP2 allows the user to select the Shutdown (SHDN) pin voltage level. The
voltage level may be set to V IN , GND, or open, depending on the placement of the JP2
jumper. When the jumper is not connecting pins 1 and 2, or pins 2 and 3 of JP2, the
voltage level may be set by attaching a signal to TP5. This allows the user to enable,
disable, or pulse the shutdown pin of the device.
The board comes with R 1 populated with a 10 k Ω resistor.
1.2.4
Ground Current Measurement
Jumper JP3 allows measurement of ground current. When a current meter is
connected to TP6 and TP7 and jumper JP3 is removed, the ground current of the
device may be measured.
1.2.5
Voltage Adjust
For Adjustable Output Voltage devices, R 2 and R 3 may be populated with appropriate
values to provide the desired output voltage.
The board comes with R 2 populated with a 68.5 k Ω resistor.
1.2.6
Power-Good (PWRGD)
For devices with a Power-Good (PWRGD) output, either R 2 or R 4 is populated,
depending on the desired pullup source voltage.
? R 2 selects V OUT as the pull-up source voltage.
? R 4 selects V IN as the pull-up source voltage.
The board comes with R 2 populated with a 68.5 k Ω resistor.
1.2.7
Load Resistor
R 5 and R 6 may be populated with the desired load resistor values for the device being
evaluated. JP4 connects R 5 to the device output, JP5 connects R 6 to the device output.
1.2.8
Output Capacitor
C 2 may be populated with the desired output capacitance. By default, C 2 is populated
with a 1 μF, 6.3V, XR7 ceramic capacitor.
1.2.9
Power Supply
J1 or TP1 and TP2 are connected to the user ’s power supply.
1.3
WHAT THE SOT-223-5 VOLTAGE REGULATOR EVALUATION BOARD KIT
INCLUDES.
This SOT-223-5 Voltage Regulator Evaluation Board kit includes:
? SOT-223-5 Voltage Regulator Evaluation Board, 102-00198
? Microchip Analog and Interface Products Demonstration Boards CD-ROM
(DS21912)
- SOT-223-5 Voltage Regulator Evaluation Board User ’s Guide, (DS51751)
DS51751A-page 6
? 2008 Microchip Technology Inc.
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