Switching Voltage Regulators 1A BUCK CONVERTER INTEGRATED INDUCTOR

EN5311QI – 1A Buck Converter with Integrated Inductor – Altera

This Altera EN5311QI non-isolated point-of-load (PoL) module delivers efficient 1A step-down voltage conversion with a fully integrated inductor. Ideal for space-constrained commercial designs, it simplifies power management while offering 94% peak efficiency and comprehensive protection features. PCX ensures genuine Altera components with reliable same-day shipping and technical support.

Key Features

• Input Voltage Range: 2.4V to 6.6V
• Adjustable Output: 0.6V to 6V at 1A max current
• Ultra-Compact Size: 5.0mm x 4.0mm x 1.1mm QFN package
• High Efficiency: Up to 94% conversion rate
• Protections: OCP, OTP, SCP, UVLO
• Control Feature: Enable pin (Active High)

Technical Details

Part of Altera’s Enpirion® 5300 series, this surface-mount DC-DC converter integrates critical power components into a single 20-QFN module. Operating from -40°C to 85°C, it features remote on/off capability and meets ITE commercial standards. The monolithic design minimizes external components while ensuring stable voltage regulation under load variations.

Typical Applications

• FPGA and ASIC auxiliary power rails
• Embedded computing systems
• Network communication equipment
• Portable medical devices
• Industrial control modules

About Altera (Intel®)

Altera, now part of Intel, pioneered programmable logic solutions and high-efficiency power ICs for over three decades. Their Enpirion® power products are renowned for integration excellence, setting industry benchmarks for power density and thermal performance in mission-critical applications.

Altera’s rigorous quality validation ensures compliance with automotive-grade reliability standards, even for commercial-grade components. This legacy of innovation makes them the preferred choice for engineers designing next-generation electronic systems requiring uncompromised power integrity.

About Buck Converters

Buck converters (step-down regulators) efficiently reduce input voltage to lower output levels while minimizing energy loss. They’re fundamental in modern electronics for powering sensitive ICs that require stable, noise-free voltage below the primary supply rail.

Integrated solutions like the EN5311QI eliminate external inductors and complex compensation networks, accelerating development cycles. This consolidation reduces board space by up to 50% compared to discrete implementations while improving EMI performance and thermal management in dense PCB layouts.

Packaging Options

Available in industry-standard Tape & Reel (TR) for automated assembly or Cut Tape (CT) for prototyping needs. All packaging maintains moisture sensitivity level (MSL) compliance for solderability assurance.

Frequently Asked Questions

Q: Is the EN5311QI suitable for battery-powered devices?
A: Yes, its 2.4V minimum input and 94% efficiency make it ideal for 3.3V/5V battery systems.

Q: Does this require external compensation components?
A: No, the converter is fully compensated internally for all output voltages.

Q: Can I parallel multiple units for higher current?
A: Not recommended; use higher-current variants from the Enpirion series instead.

Q: What thermal precautions are needed at full load?
A: Follow PCB layout guidelines in the datasheet; no heatsink required under 85°C ambient.

Q: How does remote on/off functionality work?
A: Apply logic high (>1.5V) to the EN pin to enable operation; pull low (<0.4V) for shutdown mode.

Q: Is this compatible with lead-free soldering processes?
A: Yes, it supports 260°C peak reflow temperatures per JEDEC standards.

Product images are representational; refer to datasheet for exact specifications.

Secure Your Supply Today!

This obsolete-component solution ships same-day from PCX’s verified inventory. Order EN5311QI now for guaranteed delivery!