The ISL8118EVAL1Z evaluation board highlights the operations of the ISL8118 pulse width modulation (PWM) controller in a DC/DC application.
The ISL8118 is a single-phase PWM controller for a synchronous buck converter with an integrated MOSFET driver that operates from +3.3V to +20V bias supply voltage. Utilizing voltage-mode operation with input voltage feed-forward compensation, the ISL8118 maintains a constant loop gain, providing optimal transient response for applications with a wide input operating voltage range
The controller features the ability to safely start-up into prebiased output loads and provides protection against overcurrent fault events. Overcurrent protection is implemented using both top-side and bottom-side MOSFET rDS(ON) sensing, eliminating the need for a current sensing resistor. Dual sensing allows the ISL8118 to detect overcurrent faults at the very low and very high duty cycles that can result from the ISL8118’s wide input range.
- DC/DC, step down
- Optimal input voltage: 9.6V to 14.4V
- Output voltage: 1.8V
- Typical output voltage ripple: 30mV
- Continuous load current (max): 25A
- Switching frequency: 300kHz
- Lead free/RoHS compliant
- Telecom/Datacom servers
- Point-of-load (POL) modules
- Routers and switchers
Disclaimer: THIS MATERIAL IS PROVIDED “AS-IS” FOR EVALUATION PURPOSES ONLY. RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (collectively, “Renesas”) DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY. Renesas provides evaluation platforms and design proposals to help our customers to develop products. However, factors beyond Renesas' control, including without limitation, component variations, temperature changes and PCB layout, could significantly affect the product performance. It is the user’s responsibility to verify the actual circuit performance.