Renesas ISL8016IR15Z-T7A

Overview

ISL8016IR15Z-T7A from Renesas Electronics (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 6A continuous output current with fixed 1.5V output, 2.7V–5.5V input range, and ±1% output voltage accuracy over temperature/load/line. It integrates high- and low-side MOSFETs (45mΩ P-Ch / 35mΩ N-Ch at 5V), supports 500kHz–4MHz adjustable switching frequency, and features reverse current protection, pre-bias start-up, and hiccup-mode short-circuit protection - deployed in FPGA and microprocessor core power supplies.

For engineers reviewing the ISL8016IR15Z-T7A datasheet, ISL8016IR15Z-T7A pinout, ISL8016IR15Z-T7A application, or ISL8016IR15Z-T7A equivalent, key selection criteria include its 1.5V fixed output with ±10% margining capability, 70µA quiescent current in PFM mode, 100% duty-cycle operation for <200mV dropout at 6A, thermal shutdown at 150°C, and QFN-20 (3×4 mm) package with exposed pad for enhanced thermal performance.

Technical Context

The ISL8016IR15Z-T7A uses peak current-mode control with slope compensation (360mV/Ts) and internal transconductance error amplifier (100µA/V with internal compensation). Its dual-mode operation-PWM (forced by SYNCIN ≥0.8V) or PFM (SYNCIN ≤0.4V)-enables fast transient response and light-load efficiency optimization.

It implements zero-cross detection for skip-mode entry after eight consecutive inductor current zero crossings, and employs hiccup-mode OCP with 17-cycle fault counter and eight-soft-start-period restart delay. Current limit is set via ISET pin (floating = 6A peak), and output margining is controlled by VSET (1.5V nominal output shifts to 1.35V or 1.65V).

Key Specifications

Pinout & Package

ISL8016IR15Z-T7A is housed in a RoHS-compliant, lead-free 20-lead 3×4 mm QFN package (L20.3x4) with exposed thermal pad. The exposed pad must be soldered to SGND and connected via multiple vias to the system ground plane for optimal thermal performance (θJC = 5°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with TPS54620RGYT and MP2315GJ-Z, the ISL8016IR15Z-T7A uniquely combines fixed 1.5V output, sub-100µA PFM quiescent current, ±10% margining, and seamless phase-interleaved paralleling - making it optimal for compact, battery-aware, and test-flexible 1.5V core power designs.

Availability

ISL8016IR15Z-T7A is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/µP and FPGA core power, and portable instrumentation requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for ISL8016IR15Z-T7A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics acquired Intersil in 2017 and maintains its high-performance analog and power management portfolio. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and IoT markets.

The ISL8016 belongs to Renesas' high-efficiency synchronous buck regulator family, designed specifically for low-voltage, high-current point-of-load applications in space-constrained and thermally sensitive systems such as portable test gear and FPGA-based edge compute platforms.

FAQ

What is the output voltage tolerance of the ISL8016IR15Z-T7A over temperature and load?

The ISL8016IR15Z-T7A delivers 1.500V ±1% over the full operating range of -40°C to +85°C, across 0A–6A load and 2.7V–5.5V input. This specification is guaranteed by the 1% reference accuracy of its internal 0.6V bandgap and precision feedback network - critical for maintaining compliance with 1.5V FPGA core voltage tolerances.

Does the ISL8016IR15Z-T7A support synchronization with an external clock source?

Yes, the ISL8016IR15Z-T7A supports external synchronization from 500kHz to 4MHz via the SYNCIN pin. A rising-edge-triggered external clock overrides the internal oscillator, enabling noise-sensitive applications (e.g., RF receivers or high-resolution ADCs) to avoid beat frequencies. The SYNCOUT pin provides a 250µA current pulse for daisy-chaining multiple ISL8016IR15Z-T7A units with programmable phase shift.

How does the ISL8016IR15Z-T7A handle pre-biased outputs during start-up?

The ISL8016IR15Z-T7A supports start-up with pre-biased outputs: when EN is asserted, the device monitors VFB and disables the high-side MOSFET until the output voltage falls below the regulation threshold, preventing reverse current flow into the output capacitor. This eliminates need for external diodes or sequencing controllers in multi-rail systems where 1.5V may be powered before other rails.

What is the thermal performance of the ISL8016IR15Z-T7A in its QFN-20 package?

The ISL8016IR15Z-T7A in its 3×4 mm QFN package achieves θJC = 5°C/W (junction-to-case) and θJA = 42°C/W (junction-to-ambient, typical). With the exposed pad properly soldered to SGND and connected via ≥6 thermal vias to an internal ground plane, it sustains 6A continuous output at +85°C ambient without derating - verified per datasheet Figure 9 power dissipation curves.

Can the ISL8016IR15Z-T7A be configured for output voltage margining, and how is it implemented?

Yes, the ISL8016IR15Z-T7A supports ±10% output voltage margining via the VSET pin: connect VSET to VIN for +10% (1.65V), leave floating for nominal 1.5V, or connect to SGND for −10% (1.35V). This feature enables in-system validation of system margin, dynamic voltage scaling, and compatibility testing without changing hardware - directly supported in the fixed-output variant ISL8016IR15Z-T7A.