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ISL8117A Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL8117A Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 23 page 1 DATASHEET Synchronous Step-Down PWM Controller ISL8117A The ISL8117A is a synchronous buck controller to generate POL voltage rails and bias voltage rails for a wide variety of applications in industrial and general purpose segments. Its wide input and output voltage ranges make it suitable for telecommunication and after-market automotive applications. ISL8117A is a derivative from the ISL8117 by replacing its CLKOUT pin with COMP pin to provide flexibility to customers to configure the voltage loop compensation externally. The ISL8117A uses the valley current modulation technique to bring a hassle-free power supply design with minimal number of components and complete protection from unwanted events. The ISL8117A offers programmable soft-start and enable functions along with a power-good indicator for ease of supply rail sequencing and other housekeeping requirements. In ideal situations, a complete power supply circuit can be designed with 10 external components and provide OV/OC/OT protections in a space conscious 16 Ld 4mmx4mm QFN package. The package uses an EPAD to improve thermal dissipation and noise immunity. Low pin count, less number of external components and default internal values, makes the ISL8117A an ideal solution for quick to market simple power supply designs. The ISL8117A utilizes single resistor settings for other functions such as operating frequency and overcurrent protection. Its current mode control with VIN feed-forward enables it to cover various applications. The unique DEM/Skipping mode at light load dramatically lowers standby power consumption with consistent output ripple over different load levels. Related Literature • UG049, “ISL8117AEVAL1Z Evaluation Board User Guide” • UG050, “ISL8117AEVAL2Z Evaluation Board User Guide” Features • Wide input voltage range: 4.5V to 60V • Wide output voltage range: 0.6V to 54V • Light-load efficiency enhancement - Low ripple diode emulation mode with pulse skipping •Programmable soft-start • Supports prebiased output with SR soft-start • Programmable frequency: 100kHz to 2MHz •External sync •PGOOD indicator •Forced PWM • Adaptive shoot-through protection • No external current sense resistor - Use lower MOSFET rDS(ON) • Functional pins with default design values - EN, RT, SS/TRK, MOD/SYNC, LGATE/OCS • Complete protection - Overcurrent, overvoltage, over-temperature, undervoltage • Pb-free (RoHS compliant) Applications • PLC and factory automation • Industrial equipments •Security surveillance • Server and data centers •Switcher and routers • Telecom and datacom •LED panels FIGURE 1. TYPICAL APPLICATION FIGURE 2. EFFICIENCY VIN VOUT VCC5V RT MOD SYNC SS TRK ISEN PHASE UGATE 1 2 3 4 12 11 10 9 5 6 7 8 16 15 14 13 PGOOD SGND ISL8117A 84 86 88 90 92 94 96 98 100 0 2 4 6 8 10 12 14 16 OUTPUT CURRENT (A) VIN = 24V VIN = 36V VIN = 18V VIN = 48V VIN = 60V CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. August 31, 2015 FN8752.0 |
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