TO263-3EV-VREG Microchip Technology, TO263-3EV-VREG Datasheet - Page 12

• Manufacturer Part Number: TO263-3EV-VREG
• Description: BOARD EVAL TO220-3/TO263-3 VREG
• Manufacturer: Microchip Technology

Specifications of TO263-3EV-VREG

• Channels Per Ic: 1 - Single
• Regulator Type: Positive Fixed
• Board Type: Partially Populated
• Utilized Ic / Part: TO-220-3 & TO-263-3 (D²Pak-3) Packages
• Silicon Manufacturer: Microchip
• Application Sub Type: Voltage Regulator
• Kit Application Type: Power Management - Voltage Regulator
• Silicon Core Number: MCP1790,MCP1825S,MCP1826S,MCP1827S
• 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

TO220-3/TO263-3 Voltage Regulator Evaluation Board User’s Guide
DS51818A-page 8
8. Read the Ground Current directly from the ammeter connected to testpoints TP6
9. Vary the input voltage to obtain data for ground current versus input voltage.
10. Add a load selection jumper, JP4 or JP5.
11. Read the Ground Current directly from the ammeter connected to testpoints TP6
12. The data collected will be the ground current versus load current.
2.3.2
R
current desired for testing. R
Either value may be selected by adding their respective jumpers.
2.3.3
Dynamic Line Step response may be evaluated by connecting an electronically
switched input voltage to testpoints TP1(+) and TP2(-) or to connector J1. An
oscilloscope is connected to TP3(Ch1 Trigger), TP9(Ch2) and TP10(Gnd). An
appropriate load is selected using R
electronically switched from a low voltage to a high voltage. The corresponding voltage
waveform data of the voltage regulator response is captured by the oscilloscope.
Microchip will be offering a Line Step module that connects directly to connector J1.
The Line Step module will be capable of switching between two voltage levels that the
user supplies.
2.3.4
Dynamic Load Step response may be evaluated by connecting an electronically
switched load to testpoints TP9(+) and TP10(-) or to connector P1. An oscilloscope is
connected to the electronic load switch signal (Ch1 Trigger) and to TP9(Ch2) and
TP10(Gnd). The load is then electronically switched from a high resistance to a low
resistance. The corresponding voltage waveform data of the voltage regulator
response is captured by the oscilloscope. Microchip will be offering a Load Step module
that connects directly to connector P1. The Load Step module will have several
selectable load values populated onboard to cover a wide range of loads. The load will
have the ability to be electronically or manually switched.
2.3.5
Power Supply Rejection Ratio tests are performed by removing the input capacitor
jumper, JP1, and connecting an appropriate PSRR analyzer to the TO220-3/TO263-3
Voltage Regulator Evaluation Board. The PSRR analyzer may then sweep the input
voltage frequencies and record the corresponding output voltages.
5
and R
and TP7.
With no load attached to the output of the voltage regulator, the measured ground
current is also called the quiescent current of the regulator.
and TP7.
6
Load Resistance
Line Step
Load Step
Power Supply Rejection Ratio (PSRR)
are used to set desired load values. One choice is to set R
6
would then be set to a value desired for specific tests.
5
and JP4 or R
6
and JP5. The input voltage is then
© 2009 Microchip Technology Inc.
5
to the minimum