Description:The ISL8117 is a synchronous buck controller used 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. The ISL8117 uses the valley current modulation technique to bring hassle-free power supply design with a minimal number of components and complete protection from unwanted events. The ISL8117 offers programma
SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Cel):
260
Seated Height-Max:
1.2 mm
Supply Current-Max (Isup):
4 mA
Surface Mount:
YES
Switcher Configuration:
BUCK
Switching Frequency-Max:
2375 kHz
Temperature Grade:
AUTOMOTIVE
Terminal Finish:
Matte Tin (Sn) - annealed
Terminal Form:
GULL WING
Terminal Pitch:
0.65 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Width:
4.4 mm
ISL8117FVEZ Frequently Asked Questions (FAQs)
Renesas provides a recommended PCB layout in the ISL8117FVEZ evaluation board user manual, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
To ensure the device operates within the specified TJ range, follow the recommended thermal design guidelines, use a thermal interface material (TIM) between the device and heat sink, and consider using a heat sink with a thermal resistance of 10°C/W or lower.
The maximum allowed voltage on the EN pin is 6V. To protect the EN pin from overvoltage, use a voltage clamp or a resistive divider to limit the voltage to 6V or less, and consider adding a TVS diode or a zener diode for overvoltage protection.
Optimize the output capacitor selection by choosing a capacitor with a low ESR (Equivalent Series Resistance) and a high ripple current rating. A 10uF to 22uF ceramic capacitor with an X5R or X7R dielectric is recommended. Additionally, consider using a capacitor with a voltage rating of 10V or higher to ensure reliable operation.
The recommended input capacitor value is 10uF to 22uF, and a ceramic capacitor with an X5R or X7R dielectric is recommended. The input capacitor should be placed as close as possible to the VIN pin to minimize noise and ensure stable operation.
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ISL8117FVEZ Overview
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