RENESAS ISL81802FRTZ-T

The ISL81802 is a dual synchronous buck controller that generates two independent outputs or a single output with two interleaved phases for a wide range of industrial and general-purpose applications. The controller features a wide input and output voltage range, making it suitable for telecom, data center, and computing applications. The ISL81802 employs peak current mode control with phase interleaving for both outputs. Each output includes a voltage regulator, current monitor, and average current regulator to provide independent average voltage and current control. An internal PLL oscillator enables precise frequency setting from 100kHz to 1MHz, and the oscillator can be synchronized to an external clock signal for frequency synchronization and phase-interleaved parallel applications. The PLL circuit can output a clock signal with programmable phase shift, which can be extended to three, four, and six phases with the desired interleaved phase shift. The ISL81802 features programmable soft-start, precision threshold enable, and a power-good indicator to simplify power rail sequencing. It also provides comprehensive protection functions including OVP, UVP, OTP, and average and peak current limiting for both outputs to ensure high reliability. The IC is available in a space-saving 32-pin 5mm×5mm TQFN package or an easy-to-assemble 38-pin 4.4mm×9.7mm HTSSOP package. Both packages incorporate an exposed thermal pad for improved thermal performance and noise immunity. The full-featured design with low pin count makes the ISL81802 an ideal solution for simple power designs with fast time-to-market.

• Wide input voltage range: 4.5V to 80V
• Wide output voltage range: 0.8V to 76V
• Four MOSFET drivers with adaptive shoot-through protection
• Constant output voltage and output current feedback loop control
• Light-load efficiency enhancement (low-ripple diode emulation and burst mode operation)
• Programmable soft-start with pre-biased rail startup support
• Programmable frequency: 100kHz to 1MHz, with cascaded phase-interleaving current sharing
• External clock synchronization
• Clock output with precise phase angle controlled by PLL or frequency dithering
• Power good indicator, output current monitor
• PWM/DE/Burst mode selectable
• Precise enable/UVLO threshold: ±2%
• Low shutdown current: 5μA
• Comprehensive protection: OCP (cycle-by-cycle and optional hiccup or constant current mode), OVP, OTP, and UVP

• Telecommunications
• Servers and Data Centers
• Automotive Electronics
• Industrial Equipment
• Power Systems