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HomeProductsPower Supplies - (Board Mount)DC DC ConvertersEN5339QI
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EN5339QI - Intel

Manufacturer Part Number
EN5339QI
Manufacturer
Intel
Allelco Part Number
32D-EN5339QI
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
30,257 pcs available, New & Original
Parts Description
DC DC CONVERTER 0.6-4.6V 14W
Package
24-QFN (6x4)
Data sheet
EN5339QI.pdf

Datasheets

EN5339QI.pdf

PCN Design/Specification

Solder paste 12/May/2016.pdf
RoHs Status
RoHS Compliant
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In stock: 30257
  • Unit Price: $3.125
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Specifications

EN5339QI Tech Specifications
Intel - EN5339QI technical specifications, attributes, parameters and parts with similar specifications to Intel - EN5339QI

Product Attribute Attribute Value
Manufacturer Intel
Voltage - Output 3 -
Voltage - Output 2 -
Voltage - Output 1 0.6 ~ 4.6V
Voltage - Input (Min) 2.4V
Voltage - Input (Max) 5.5V
Type Non-Isolated PoL Module
Supplier Device Package 24-QFN (6x4)
Size / Dimension 0.24" L x 0.16" W x 0.04" H (6.0mm x 4.0mm x 1.1mm)
Series Enpirion® 5300
Package / Case 24-PowerTQFN Module
Product Attribute Attribute Value
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 85°C
Number of Outputs 1
Mounting Type Surface Mount
Features Remote On/Off, OCP, OTP, SCP, UVLO
Efficiency 95%
Current - Output (Max) 3A
Control Features Enable, Active High
Base Product Number EN5339
Applications ITE (Commercial)

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8504.40.9580

Parts Introduction

EN5339QI Image
EN5339QI (1)

Manufacturer Part Number

EN5339QI

Manufacturer

Intel

Introduction

The EN5339QI is a non-isolated Point-of-Load (PoL) power module from Intel's Enpirion 5300 series. It is designed for high-efficiency power conversion in a wide range of commercial and industrial applications.

Product Features and Performance

Output voltage range of 0.6V to 4.6V

Input voltage range of 2.4V to 5.5V

Maximum output current of 3A

Efficiency up to 95%

Compact 24-QFN (6x4) package

Integrated control features including remote on/off, overcurrent protection (OCP), overtemperature protection (OTP), short-circuit protection (SCP), and undervoltage lockout (UVLO)

Product Advantages

High efficiency for power-sensitive applications

Compact size for space-constrained designs

Integrated protection features for reliable operation

Easy to use with simple control interface

Key Technical Parameters

Input voltage range: 2.4V to 5.5V

Output voltage range: 0.6V to 4.6V

Maximum output current: 3A

Efficiency: Up to 95%

Operating temperature range: -40°C to 85°C

Package: 24-QFN (6x4), Tape & Reel

Quality and Safety Features

RoHS compliant

Integrated protection features for reliable operation

Compatibility

The EN5339QI is designed for use in a wide range of commercial and industrial applications, including:

Information technology equipment (ITE)

Industrial automation and control systems

Telecommunication equipment

Networking and server equipment

Application Areas

Power conversion for microprocessors, FPGAs, ASICs, and other digital ICs

Point-of-load power regulation in distributed power architectures

Power conditioning for sensitive electronic systems

Product Lifecycle

The EN5339QI is an actively supported product in Intel's Enpirion 5300 series. Replacements and upgrades may be available as technology evolves.

Several Key Reasons to Choose This Product

High efficiency for energy-efficient power conversion

Compact size for space-constrained designs

Integrated protection features for reliable operation

Easy to use with simple control interface

Wide input and output voltage ranges for versatile applications

Frequently Asked Questions(FAQ)

How does the EN5339QI's efficiency of 95% impact thermal design in a compact 6x4mm footprint, and what are the implications for high-current PoL applications?
With an efficiency rating of 95%, the EN5339QI converts power very effectively, minimizing heat generation even at its maximum output of 3A. This is critical in space-constrained systems where thermal dissipation is limited by the small 24-QFN package. In a 14W application, the power loss is approximately 0.74W (14W × 5%), which, while low, still requires careful PCB layout to avoid localized hotspots. Engineers must consider via placement and copper area under the module to ensure junction temperatures remain within the -40°C to 85°C range, especially in commercial ITE environments with variable airflow.
When comparing the EN5339QI to other Enpirion® 5300 series modules like the EN5340QI, how do output current and input voltage range differences affect system-level trade-offs?
The EN5339QI delivers up to 3A output current across a 2.4V to 5.5V input range, making it suitable for moderate-power digital loads. In contrast, higher-current variants such as the EN5340QI support up to 6A, but may have tighter input tolerances or different switching frequencies. Choosing between them involves balancing current headroom against quiescent current and noise performance. For designs requiring precise 1.8V or 3.3V rails in compact form factors, the EN5339QI offers sufficient capacity without over-engineering, reducing BOM cost and footprint complexity.
What design considerations arise when using the EN5339QI’s remote on/off control feature with active-high logic, particularly in multi-rail power architectures?
The EN5339QI supports remote enable via an active-high signal, allowing centralized power sequencing in complex systems. However, this requires careful coordination with upstream controllers to ensure proper timing—especially during startup and shutdown transients. If multiple EN5339QI modules are used, their enable signals must be synchronized to prevent inrush current surges or voltage droop on shared input rails. Additionally, PCB routing should minimize trace inductance near the EN pin to maintain clean switching transitions and avoid false triggering due to noise coupling.
How does the EN5339QI handle protection mechanisms such as overcurrent (OCP), overtemperature (OTP), and short-circuit protection (SCP) under transient load conditions?
The EN5339QI integrates robust protection features including OCP, OTP, and SCP, which respond dynamically to fault conditions. During a sudden short-circuit event, the OCP circuitry limits current to safe levels, typically within microseconds, preventing damage to downstream components. OTP activates if internal temperature exceeds safe thresholds, reducing output power or shutting down temporarily. These protections are essential for reliability in ITE equipment exposed to environmental stress, though they may cause intermittent operation if triggered repeatedly—requiring design margins in peak load scenarios.
Given its RoHS compliance and MSL 3 classification, what storage and handling precautions are necessary for the EN5339QI during prototyping and mass production?
As a RoHS-compliant device with Moisture Sensitivity Level (MSL) 3, the EN5339QI must be stored in dry conditions below 60°C and 60% relative humidity prior to use. It can withstand one reflow cycle after 168 hours in ambient storage, but prolonged exposure to moisture increases risk of popcorning during soldering. Fabrication facilities should follow standard JEDEC guidelines for baking before assembly, particularly in lead-free reflow profiles exceeding 245°C. Proper handling ensures solder joint integrity and long-term reliability in end applications.
What are the key PCB layout recommendations for maximizing performance and stability when implementing the EN5339QI in a high-density digital system?
To achieve optimal performance with the EN5339QI, the input capacitor should be placed as close as possible to the VIN and GND pins, minimizing loop inductance. A low-ESR ceramic capacitor (typically 10µF) is recommended at the input, supplemented by additional bulk capacitance if input transients are expected. The output filter also benefits from tight placement near the module, with Kelvin connections to sense output voltage accurately. Ground planes beneath the module enhance thermal conductivity, but care must be taken to avoid creating ground loops that could couple noise into sensitive analog circuits.
Can the EN5339QI be used in battery-powered applications, and what factors influence its suitability compared to dedicated power management ICs (PMICs)?
While not optimized for ultra-low quiescent current, the EN5339QI can serve in lightweight battery-operated devices due to its 95% efficiency and compact size. However, PMICs designed for portable use often integrate buck-boost converters, fuel gauging, and dynamic voltage scaling—features absent in the EN5339QI’s fixed 2.4–5.5V input range. For simple point-of-load regulation in non-mobile ITE equipment, however, the EN5339QI provides a reliable solution without sacrificing board real estate or introducing unnecessary complexity.
How does the EN5339QI’s operating temperature range of -40°C to 85°C influence its selection for industrial versus commercial environments?
The EN5339QI is rated for -40°C to 85°C, placing it squarely in the industrial-grade category rather than consumer or commercial-only devices. This extended temperature tolerance allows deployment in outdoor kiosks, factory automation, or transportation electronics where ambient conditions vary widely. Commercial ITE applications typically require only 0°C to 70°C, so the broader range adds value where environmental controls are absent. However, thermal derating may still apply near the upper limit, necessitating airflow or heat-spreading techniques in sealed enclosures.
What role does the UVLO (Under-Voltage Lockout) feature play in system reliability when using the EN5339QI, and how does it interact with brown-out conditions?
The UVLO function prevents the EN5339QI from operating when the input voltage drops below a safe threshold (typically around 2.2V), avoiding unstable output during input sags or brown-out events. This safeguards downstream components from receiving corrupted power, which could otherwise cause latch-up or data corruption in microcontrollers. The hysteresis built into the UVLO circuit ensures clean transition behavior, reducing the chance of oscillation near the trip point. Designers should verify that their system’s minimum operating voltage remains above the UVLO threshold under worst-case conditions, such as cold starts or inductive load dumps.
How does the EN5339QI compare to discrete DC-DC solutions in terms of total system cost and development time for a new PoL design?
Integrating the EN5339QI reduces development time significantly compared to designing a custom regulator using external FETs, gate drivers, and compensation networks. Its fully integrated architecture includes compensation, feedback, and protection, cutting component count and board space by up to 50%. While unit cost per part may be higher than discrete alternatives, the total system cost often decreases due to reduced labor, testing overhead, and faster time-to-market. For low-to-medium volume designs targeting ITE markets, this makes the EN5339QI a compelling choice despite premium pricing.
Are there any known limitations or edge cases in the EN5339QI’s performance related to light-load efficiency or start-up behavior?
At light loads below 100mA, the EN5339QI maintains reasonable efficiency due to pulse-skipping or burst-mode operation, though it may exhibit slight ripple modulation. Start-up is generally soft and controlled, but fast enable signals combined with large output capacitors (>100µF) can delay turn-on due to slow ramp rates. Additionally, enabling the module immediately after a deep discharge (<2.4V) may result in delayed startup until input voltage recovers above UVLO. These behaviors are typical of modern synchronous regulators and can be mitigated through proper capacitor selection and enable timing design.
What impact does the 24-QFN (6x4mm) packaging have on thermal resistance and solderability during reflow soldering?
The compact 24-QFN package of the EN5339QI presents challenges in thermal management due to its small exposed pad, which serves as both mechanical anchor and thermal interface. Thermal resistance (θJA) is inherently higher than larger modules, so designers must rely on PCB copper pours and vias for heat spreading. During reflow, the entire bottom surface must make consistent contact with the solder paste to avoid voids, requiring precise stencil printing and alignment. Automated optical inspection (AOI) is recommended post-reflow to detect insufficient wetting or bridging between fine-pitch pins.
How should engineers evaluate the EN5339QI’s suitability for automotive applications despite its stated ITE focus?
Although the EN5339QI is specified for ITE applications and lacks AEC-Q100 qualification, it may still see use in non-critical automotive subsystems where harshness levels are moderate. However, full compliance with ISO 16750-3 for vibration, temperature cycling, and humidity is not guaranteed. Engineers considering automotive deployment must conduct rigorous environmental stress testing, including thermal shock (-40°C to +125°C cycling) and mechanical shock, to validate reliability. Without official automotive grade certification, the risk of premature failure in mission-critical functions outweighs potential cost savings.
What considerations apply when cascading multiple EN5339QI modules to achieve lower output voltages or increased current delivery?
Cascading two EN5339QI modules—one as a pre-regulator followed by another as a PoL—can extend voltage flexibility, but introduces challenges in efficiency stacking and stability. Each stage incurs conversion loss, so total efficiency drops multiplicatively. Moreover, feedback loops must be isolated to prevent interaction, and output ripple accumulates. Instead, using a single EN5339QI with external LDOs or post-regulation is often more efficient. True cascading is rarely beneficial unless specific sequencing or isolation is required, making alternative topologies preferable for most designs.
How does the EN5339QI’s fixed switching frequency influence EMI filtering requirements in a noisy digital environment?
Operating at a constant switching frequency simplifies EMI mitigation compared to variable-frequency regulators, as conducted emissions cluster around predictable harmonics. The EN5339QI typically runs in the 1–2 MHz range, placing much of its energy outside audio bands but within sensitive RF receiver ranges. Careful layout, input/output filtering, and shielding can suppress emissions below regulatory limits (e.g., CISPR 32). Engineers should perform pre-compliance testing early in development to identify problematic frequencies and adjust bypass capacitor values or add ferrite beads as needed.
What steps should be taken to verify the EN5339QI’s performance under worst-case transient response, such as step changes from 1A to 3A?
To validate transient response, test the EN5339QI with a programmable load that can switch rapidly between 1A and 3A while monitoring output voltage deviation. Acceptable overshoot and undershoot depend on the load’s sensitivity—typically ±3% for FPGAs or processors. The module’s internal compensation should maintain stability across all conditions, but adding a small feedforward capacitor (e.g., 10pF) from output to feedback pin can improve transient recovery. Data sheet plots usually show idealized results; real-world validation under actual load profiles is essential before finalizing the design.
How does the absence of isolation in the EN5339QI affect system safety in fault scenarios involving ground loops or floating loads?
Being a non-isolated converter, the EN5339QI shares a common ground between input and output, eliminating isolation barriers. This means that a fault on the output side (e.g., a short to chassis ground) can propagate back through the module to the input supply. In systems with mixed-signal or safety-critical loads, this creates risks of ground loops, noise coupling, or unsafe potentials. Isolation transformers or opto-couplers may be required downstream if galvanic separation is mandated by standards like IEC 60950-1, limiting the EN5339QI’s use to inherently safe environments.
What documentation and reference designs are available to accelerate implementation of the EN5339QI in a new product?
Intel provides evaluation boards and reference schematics specifically for the EN5339QI, detailing optimal component values, layout examples, and thermal performance data. These resources include detailed bill of materials (BOM), Gerber files, and application notes covering efficiency curves, transient response, and EMI best practices. Downloading these materials from the manufacturer’s portal significantly reduces design risk and accelerates bring-up. Additionally, SPICE models may be available for simulation, enabling early analysis of stability and performance under varying loads before hardware iteration begins.

Parts with Similar Specifications

The three parts on the right have similar specifications to Intel EN5339QI

Product Attribute EN5335QI EN5336QI EN5337QI EN5365QI
Part Number EN5335QI EN5336QI EN5337QI EN5365QI
Manufacturer Intel Intel Intel Intel
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Features - - - Simultaneous Sampling
Applications - - - -
Voltage - Output 1 - - - -
Type - - - -
Number of Outputs - - - -
Voltage - Input (Min) - - - -
Control Features - - - -
Efficiency - - - -
Voltage - Output 2 - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Mounting Type - Surface Mount Through Hole Surface Mount
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Voltage - Input (Max) - - - -
Current - Output (Max) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Size / Dimension - - - -
Voltage - Output 3 - - - -

EN5339QI Datasheet PDF

Download EN5339QI pdf datasheets and Intel documentation for EN5339QI - Intel.

Datasheets
EN5339QI.pdf
PCN Obsolescence/ EOL
Mult Dev EOL 17/Sep/2021.pdf Mult Dev EOL Update 27/Jan/2022.pdf Multi Dev obs 15/Jul/2022.pdf
PCN Packaging
Mult Dev Label CHG 24/Jan/2020.pdf Mult Dev Label Chgs 24/Feb/2020.pdf
PCN Design/Specification
Solder paste 12/May/2016.pdf

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EN5339QI Image

EN5339QI

Intel
32D-EN5339QI

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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