RT7285CGJ6
Evaluation Board
UG7285CGJ6-00 January 2015
3
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Bench Test Setup Conditions
Headers Description and Placement
Please carefully inspect the EVB IC and external components, comparing them to the following Bill of Materials, to ensure that all components are
installed and undamaged. If any components are missing or damaged during transportation, please contact the distributor or send e-mail to
Test Points
The EVB is provided with the test points and pin names listed in the table below.
Test point/
Pin name
Signal
Comment (expected waveforms or voltage levels on test points)
VIN
Input voltage
Input voltage range= 4.3V to 18V
VOUT
Output voltage
Default output voltage = 1.2V
Output voltage range= 0.6V to 8V
(see ‘’ Output Voltage Setting’’ section for changing output voltage level)
SW
Switching node test point
SW waveform
EN
Enable test point
Enable signal. Drive EN or install a shorting block on Jumper JP2 to
enable operation or disable operation.
JP2
Chip enable control
Install jumper or drive EN directly to enable or disable operation
BOOT
Boot strap supply test point
Floating supply voltage for the high-side N-MOSFET switch
GND
Ground
Ground
Power-up & Measurement Procedure
1.
Apply a 12V nominal input power supply (4.3V < V
IN
< 18V) to the VIN and GND terminals.
2.
The EN voltage is
pulled to logic high by R5 (100kΩ to VIN) to enable operation. Drive EN high (>1.5V) to
enable operation or low (<0.4V) to disable operation.
3.
Verify the output voltage (approximately 1.2V) between VOUT and GND.
4.
Connect an external load up to 1.5A to the VOUT and GND terminals and verify the output voltage and current.
