EN5329QI Description

A highly integrated low-profile synchronous buck PowerSoC, the EN5329QI combines a PWM controller, power MOSFETs and an integrated inductor into a single 4 × 6 × 1.1 mm QFN module to deliver up to 2 A of regulated output from a 2.4–5.5 V input window.

EN5329QI Features

Compact PowerSoC with embedded inductor — minimizes board area and BOM by including the inductor inside the package.

Wide input range (typ. 2.4 V to 5.5 V) — suitable for common 3.3 V and 5 V rails.

Single-output adjustable output from ~0.6 V up to ~4.9 V and up to 2 A continuous output current.

High switching frequency (~3.2 MHz) — allows use of small MLCC output capacitors and improves transient response.

Internal compensation for unconditional stability — simplifies external component selection and speeds design cycles.

Protection features — built-in OCP (over-current), OTP (over-temperature), UVLO and short-circuit protections help robust operation.

Low profile QFN-24 package (4 mm × 6 mm × 1.1 mm) — good thermal behavior while keeping height to a minimum.

Evaluation kit and reference layouts available — reduces risk and accelerates evaluation (EVB/USER guides exist).

EN5329QI Applications

Point-of-load regulation for FPGAs or SoC rails where a dense, low-profile 2 A rail is required (board POL converter).

Powering USB-domain peripherals or sensors from a 5 V supply while stepping down to low core voltages.

Compact embedded systems and wearable hubs that need a tiny power module with strong transient response.

Replacement or upgrade in legacy designs that want an integrated-inductor solution to reduce EMI and BOM count.

On-board power for communications modules (cellular or radio front-ends) where a small form factor and reliable protections are priorities.

EN5329QI CAD Model

3D Model

EN5329QI Alternatives

EN5319QI (EN53x9 family) — 1.5 A PowerSoC, same family with pin-compatibility options for slightly lower current needs.

EN5339QI (EN53x9 family) — 3 A PowerSoC in the same footprint family if higher output current is required.

TI TPS62840 (and similar TI nano/Micro modules) — discrete-IC or compact module alternatives from Texas Instruments for applications prioritizing ultra-low quiescent current or different package options.

EN5329QI Manufacturer

Intel Corporation is a global technology leader headquartered in Santa Clara, California, USA, best known for designing and manufacturing advanced semiconductors, microprocessors, and computing platforms. Founded in 1968 by Robert Noyce and Gordon Moore, Intel pioneered the modern microprocessor and has since become one of the world’s largest and most influential chipmakers.

Intel’s product portfolio spans a wide range of technologies, including central processing units (CPUs) for PCs, servers, and embedded systems; graphics processors (GPUs); networking and communication solutions; and memory and storage products. In recent years, Intel has expanded its focus to areas such as artificial intelligence (AI), autonomous driving, cloud computing, and foundry services, reflecting its vision to enable a world of ubiquitous computing and smart connectivity.

With major processor brands like Intel® Core™, Xeon®, and Atom®, as well as its new Intel Foundry Services (IFS) for custom silicon manufacturing, Intel continues to drive innovation in the semiconductor industry. Its technology powers everything from personal computers and data centers to Internet of Things (IoT) devices and 5G infrastructure, helping shape the backbone of the digital world.

EN5329QI FAQs

Does the EN5329QI include the inductor, or do I need an external choke?

No external inductor is required: the EN5329QI is a PowerSoC with an integrated inductor, so the magnetic component is already inside the 24-pin QFN package. This dramatically simplifies layout and BOM.

What input and output voltage ranges does the EN5329QI support?

The device accepts approximately 2.4 V to 5.5 V on VIN and can be configured for outputs roughly from 0.6 V up to ~4.9 V, supporting common core rails and IO voltages.

Is the EN5329QI appropriate for battery-powered, ultra-low-IQ designs?

Not ideal — it’s optimized for high-density point-of-load conversion with a focus on transient performance and integration rather than ultra-low quiescent current; choose a low-IQ specialized regulator (e.g., TI low-Iq family) if battery standby current is critical.

What thermal / current limits should I expect at full load in a compact PCB layout?

The EN5329QI is rated for up to 2 A output, but real board thermal performance depends on copper area, vias under the exposed pad and ambient temperature; follow the manufacturer’s recommended PCB footprint and thermal vias on the EVB/user guide to avoid thermal derating.

Is EN5329QI still in production and recommended for new designs?

Many distributor listings show the EN53x9 family as being obsolete / end-of-life or at least legacy (check live inventory); for long-life new designs you should confirm availability with suppliers or choose a current alternative in a similar footprint.