USER’S MANUAL
AN1667
Rev.0.00
January 17, 2012
ISL75051SRHEVAL1Z
ISL75051SRH High Performance 3A LDO Evaluation Board
AN1667 Rev.0.00
Page 1 of 15
January 17, 2012
Description
The ISL75051SRH is a high-performance, adjustable,
low-voltage, high-current, low-dropout linear regulator
specified at 3A rated output current for input voltages from
2.2V to 6V. The LDO outputs can be adjusted from 0.8V to 5V
by means of two preset resistors. Salient features of the part
include:
• TID, ELDRS and SEE Rated
• Very Fast Load Transient Response
• ±2.0% Guaranteed VOUT Accuracy over Line, Load and
Temperature
• Typical Dropout of 287mV at 3A
• EN Feature
• PG Feature
• OCP Feature
• Short-circuit and Over-temperature Protection
The ISL75051SRHEVAL1Z evaluation board provides a simple
platform to evaluate performance of the ISL75051SRH. The
device output voltage is adjustable, and jumpers are provided
to easily set popular output voltages.
What’s Inside
The evaluation kit contains the following:
• ISL75051SRHEVAL1Z evaluation board
• ISL75051SRH datasheet
• AN1667 application note
Test Steps
1. Select the desired output voltage by shorting one of the
jumpers from J2 through J6. The option of JP7 provides for
continuous adjustment of VOUT using potentiometer R13.
2. Set the OCP limit by using jumpers JP8 and JP9. JP9 = 0.8A
min, and JP8 = 4A min.
3. Close JP10. Also closing jumper JP1 (2 and 3) selects
R2 = 5.49k as pull-up for PGOOD.
4. Ensure that the output capacitor and C
P
are set according
to recommended values shown in Table 1.
5. Connect the input supply to VIN/GND and the load to
VOUT/GND. Select the VIN to VOUT ratio to keep dissipation
within the thermal limits of the device.
6. Use JP11 to enable/disable the IC; Open = Enable, and
Close = Disable. (Note: For REVB boards, Close = Enable
and Open = Disable.)
FIGURE 1. ISL75051SRHEVAL1Z EVALUATION BOARD
January 17, 2012
AN1667.0
