Renesas ISL8016IR12Z-T

Overview

ISL8016IR12Z-T from Renesas Electronics (formerly Intersil) is a 6A monolithic synchronous buck regulator with fixed 1.2V output, operating from 2.7V–5.5V input. It integrates low-R_DS(on) P- and N-channel MOSFETs, delivers up to 97% efficiency at 6A, supports 100% duty-cycle operation (<200mV dropout), and features adjustable frequency (500kHz–4MHz), pre-bias start-up, and reverse current protection - deployed in FPGA and microprocessor core power supplies.

For engineers reviewing the ISL8016IR12Z-T datasheet, ISL8016IR12Z-T pinout, ISL8016IR12Z-T application, or ISL8016IR12Z-T equivalent, key selection criteria include its fixed 1.2V output accuracy (±1%), 1MHz default switching frequency, thermal shutdown at 150°C, 20-pin 3×4 QFN package with exposed pad, and support for phase interleaving in multi-phase >6A configurations.

Technical Context

The ISL8016IR12Z-T employs peak current-mode control with slope compensation for fast transient response and loop stability. Its internal 0.6V reference and resistor-divider feedback network (shorted VFB to output for fixed-VOUT variants) enable precise 1.2V regulation with ±1% tolerance over temperature, line, and load.

It supports dual operating modes: PWM (SYNCIN ≥0.8V) for low-noise constant-frequency operation, and PFM (SYNCIN ≤0.4V) for ultra-low quiescent current (70µA at no load). Current limit is set via ISET pin (floating = 6A nominal), and soft-start time is configurable via SS pin capacitor or internal 1ms ramp.

Key Specifications

Pinout & Package

ISL8016IR12Z-T is housed in a RoHS-compliant, thermally enhanced 20-lead 3mm × 4mm QFN package (L20.3x4) with exposed pad connected to SGND for optimal thermal performance (θ_JA = 42°C/W, θ_JC = 5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54620RGYR and MP2315DJ-LF-Z, the ISL8016IR12Z-T uniquely combines 2.7V–5.5V input range, fixed 1.2V output, pre-bias start-up, and PFM/PWM mode selection - making it optimal for battery-powered 1.2V core rails requiring robustness and low IQ.

Availability

ISL8016IR12Z-T is available at Aetrix Electronics and suitable for FPGA power delivery, portable instrumentation, and Li-ion powered IoT nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ISL8016IR12Z-T 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 ISL8016IR12Z-T belongs to Renesas' ISL8016 family of monolithic synchronous buck regulators, designed specifically for high-current, low-voltage core power in space-constrained portable and embedded systems.

FAQ

What is the output voltage tolerance of the ISL8016IR12Z-T over temperature and load?

The ISL8016IR12Z-T delivers a fixed 1.2V output with ±1% accuracy over the full –40°C to +85°C ambient temperature range, line (2.7V–5.5V VIN), and load (0–6A). This specification is guaranteed by the internal 0.6V bandgap reference and precision feedback network, ensuring stable core voltage for sensitive processors without external calibration. The ISL8016IR12Z-T achieves this via trimmed reference and matched internal resistors, eliminating drift-related margining errors seen in adjustable counterparts.

Does the ISL8016IR12Z-T support operation with a pre-biased output capacitor?

Yes, the ISL8016IR12Z-T supports start-up into a pre-biased output. Its control architecture actively monitors VFB during soft-start and disables the high-side FET until the output voltage falls below the regulation threshold, preventing reverse current and uncontrolled inrush. This feature is confirmed in the datasheet's "Start-up with Pre-Biased Output" section and is essential for hot-swap and multi-rail sequencing applications where the ISL8016IR12Z-T may power up after other supplies.

How is the switching frequency configured on the ISL8016IR12Z-T?

The ISL8016IR12Z-T defaults to 1MHz when the FS pin is tied to VIN, enabling internal compensation. To adjust frequency between 500kHz and 4MHz, connect a resistor from FS to SGND per Equation 1 in the datasheet (RT = (220×10³)/f_OSC – 14 kΩ). For example, a 42.4kΩ resistor sets f_SW ≈ 3.9MHz. The ISL8016IR12Z-T also accepts external synchronization up to 4MHz via the SYNCIN pin, with master-slave phase shifting supported through SYNCOUT timing.

What protection features does the ISL8016IR12Z-T include?

The ISL8016IR12Z-T integrates peak current limiting, hiccup-mode short-circuit protection, over-temperature shutdown (150°C), undervoltage lockout (2.7V rising), reverse current protection, and soft-stop output discharge. Overcurrent protection uses an 17-cycle fault counter before entering hiccup mode, and thermal shutdown includes 25°C hysteresis to prevent oscillation. These protections are fully implemented in silicon and require no external components - a key reliability advantage of the ISL8016IR12Z-T in mission-critical power stages.

Can multiple ISL8016IR12Z-T units be paralleled for higher current?

Yes, the ISL8016IR12Z-T supports current sharing and phase interleaving via SYNCOUT/SYNCIN pins. In a two-phase configuration, one device acts as master (SYNCOUT driving SYNCIN of slave), with optional capacitor-induced phase shift (e.g., 90°) to reduce input/output ripple. The datasheet confirms >6A operation (e.g., 12A in Figure 3), and ISET pin configuration ensures matched current limits. This capability makes the ISL8016IR12Z-T scalable for demanding FPGA or ASIC core rails without redesigning the entire power stage.