Renesas EL7566AIREZ-T13

Overview

EL7566AIREZ-T13 from Intersil is a synchronous step-down DC/DC regulator delivering up to 6A continuous output current with 96% peak efficiency, operating from 3V–6V input and supporting adjustable output voltages down to 0.8V. It integrates PMOS/NMOS power FETs, features 100% duty cycle capability, and includes junction temperature monitoring and ±5% voltage margining for manufacturing validation. It is used in FPGA core supplies and high-density point-of-load applications.

For engineers reviewing the EL7566AIREZ-T13 datasheet, EL7566AIREZ-T13 pinout, EL7566AIREZ-T13 application, or EL7566AIREZ-T13 equivalent, key selection considerations include its -40°C to +85°C operating range, HTSSOP-28 package with exposed thermal pad, integrated soft-start and tracking start-up control, and absence of overvoltage protection compared to the DRE variant.

Technical Context

The EL7566AIREZ-T13 employs peak current-mode control with on-chip resistorless current sensing derived from the upper PMOS switch, enabling fast transient response and stable loop compensation. Its oscillator supports adjustable switching frequency from 200kHz to 1MHz via external COSC capacitor and allows external synchronization with 20% frequency margin.

It implements digital soft-start (2ms default, extendable via STP/STN), full start-up sequencing (cascade, linear, offset, adjustable), and thermal shutdown at 135°C with 20°C hysteresis. The VTJ pin provides a linear 1.2mV/°C analog voltage proportional to junction temperature, calibrated per Equation 3 in the datasheet.

Key Specifications

Pinout & Package

EL7566AIREZ-T13 is housed in a RoHS-compliant, Pb-free 28-lead HTSSOP package (MDP0048) with an exposed thermal pad requiring solder connection to PCB ground plane for thermal performance. Pin assignments are validated per FN7102 Rev 7.00, Page 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with EL7566AIREZ-T13, MP2315DJ-LF-Z offers higher integration in smaller footprint but sacrifices current capability and diagnostic features; TPS54620RGYT provides broader input range and OVP but omits junction temperature monitoring and production margining - making EL7566AIREZ-T13 uniquely suited for industrial FPGA/DSP core supplies requiring thermal visibility and test flexibility.

Availability

EL7566AIREZ-T13 is available at Aetrix Electronics and suitable for FPGA core supplies, DSP/CPU power rails, and point-of-regulation logic bus applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for EL7566AIREZ-T13 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

Intersil Corporation (now part of Renesas Electronics) designs high-performance analog and power management ICs for industrial, computing, and communications markets, with ISO9001-certified manufacturing.

The EL7566 product line delivers monolithic synchronous buck regulators targeting high-current, space-constrained point-of-load applications in FPGA, DSP, and CPU subsystems - emphasizing thermal visibility, start-up flexibility, and production testability.

FAQ

What is the operating temperature range of the EL7566AIREZ-T13?

The EL7566AIREZ-T13 is specified for -40°C to +85°C ambient operating temperature, confirmed in the Ordering Information table on page 2 of FN7102 Rev 7.00. This extended range distinguishes it from the EL7566DRE variant (0°C to +85°C) and qualifies it for industrial and outdoor embedded applications where thermal extremes are expected. The junction temperature indicator (VTJ pin) remains functional across this full range.

Does the EL7566AIREZ-T13 include overvoltage protection (OVP)?

No, the EL7566AIREZ-T13 does not include overvoltage protection. As explicitly stated in the "EL7566DRE vs. EL7566AIRE" section on page 9 of FN7102 Rev 7.00, the AIRE variant omits OVP functionality present in the DRE version. System-level OVP must therefore be implemented externally using discrete components or supervisory ICs if required by safety or reliability specifications.

How is the output voltage set on the EL7566AIREZ-T13?

The output voltage of the EL7566AIREZ-T13 is set using an external resistor divider connected between VOUT, FB, and SGND. Per Equation on page 10 of FN7102 Rev 7.00, VO = 0.8 × (1 + R1/R2). Standard values for common output voltages (e.g., 2.5V uses R1 = 21.5kΩ, R2 = 10kΩ) are listed in Table 1. The FB pin draws only 100–200nA, enabling high-resistance dividers to minimize quiescent current.

What is the purpose of the VTJ pin on the EL7566AIREZ-T13?

VTJ is the junction temperature monitor output pin on the EL7566AIREZ-T13. It provides a linear analog voltage (1.2mV/°C, offset by 75°C baseline) proportional to die temperature, as defined in Equation 3 on page 11 of FN7102 Rev 7.00. Engineers use VTJ to validate thermal design margins, implement dynamic throttling, or replace external temperature sensors in space-constrained layouts.

Can the EL7566AIREZ-T13 be synchronized to an external clock?

Yes, the EL7566AIREZ-T13 supports external oscillator synchronization. As described on page 10 and illustrated in Figure 20 of FN7102 Rev 7.00, an external sync signal can be applied to the COSC pin via a level-shifting circuit. To ensure reliable locking, the internal self-switching frequency must be set at least 20% lower than the external sync frequency to accommodate component tolerances.