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EN5337QI

3A PowerSoC buck converter, 5MHz, integrated inductor, 2.375-5.5V in, 0.6-5V out, 92% eff, QFN-38 7x4mm

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Manufacturer Part：

EN5337QI

Package：

QFN-38 (7.0 x 4.0 x 1.9mm, exposed pad)

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Description

Product Overview

The EN5337QI from Altera (Enpirion) is a 3A PowerSoC synchronous buck DC-DC converter with an integrated inductor in a 7x4mm QFN-38 package. Operating at 5MHz switching frequency from 2.375V to 5.5V input, it delivers adjustable 0.6V to 5V output at up to 92% efficiency with a total solution footprint of approximately 75mm².

Key Specifications

Topology Synchronous Buck (Step-Down)
Input Voltage 2.375V to 5.5V
Output Voltage 0.6V to 5V (adjustable)
Output Current 3A continuous
Switching Frequency 5MHz
Peak Efficiency 92%
Integrated Inductor Yes (in package)
Integrated MOSFETs Yes (high-side + low-side)
Control Mode Voltage-mode PWM
Output Enable Active high
Power OK (POK) Yes
External Sync Yes (SYNC pin)
Soft Start Programmable
Protection OCP, SCP, OTP, UVLO
Package QFN-38 (7 x 4 x 1.85mm)
Operating Temperature -40°C to +85°C
Life Cycle Obsolete (EOL)

Features

  • Integrated inductor, MOSFETs, and controller in one package
  • Total power solution footprint ≈ 75mm²
  • 3A continuous output current
  • 5MHz switching frequency (external clock sync)
  • Up to 92% peak efficiency
  • Adjustable output from 0.6V to 5V
  • Programmable soft-start time
  • Power OK output signal
  • Undervoltage lockout (UVLO)
  • Overcurrent protection (OCP)
  • Short circuit protection (SCP)
  • Thermal shutdown protection (OTP)
  • Minimal external components required

Applications

  • Point-of-load regulation for FPGAs and ASICs
  • Low-power processor and DSP core voltage
  • Noise-sensitive A/V and RF applications
  • Distributed power architectures (2.5V, 3.3V, 5V rails)
  • Networking, computing, and consumer equipment

The EN5337QI from Altera (formerly Enpirion) is a 3A PowerSoC synchronous buck DC-DC converter that integrates the MOSFET switches, controller, compensation, and inductor into a single 7x4mm QFN-38 package. Operating at 5MHz switching frequency from a 2.375V to 5.5V input, it delivers an adjustable output from 0.6V to 5V at up to 92% efficiency. The total solution footprint is only approximately 75mm², requiring just input and output capacitors externally. Note: This device is obsolete; the EN5339QI or Intel Enpirion 3A PowerSoC alternatives should be considered for new designs.

The EN5337QI uses a voltage-mode PWM control architecture operating at a fixed 5MHz switching frequency. The integrated high-side and low-side MOSFET switches are driven by the controller, with the proprietary integrated inductor storing energy during the on-time and releasing it during the off-time. The 5MHz frequency enables very small inductor and capacitor values, allowing the inductor to be integrated within the package. The voltage-mode control compares a fraction of the output voltage (through the FB pin) against an internal reference, with the error amplifier driving the PWM modulator. External clock synchronization via the SYNC pin allows multiple converters to operate at the same frequency, preventing beat-frequency interference in noise-sensitive applications.

Pin Name Type Function
1-2, 12, 34-38 NC(SW) – No connect (internally connected to switch node, do not connect externally)
3-11 VOUT Power Regulated output voltage
13-18 PGND Power Power ground (connect to GND plane)
19-21 PVIN Power Input power supply (2.375V to 5.5V)
22-25 NC – No connect (do not connect)
26 SYNC Input External clock synchronization
27 ENABLE Input Output enable (active high)
28 POK Output Power OK status (open-drain)
29 SS Analog Soft-start capacitor
30 FB Input Output voltage feedback
31 AGND Power Analog ground
32 AVIN Power Analog supply input
33 EAOUT Analog Error amplifier output (compensation)
  • Point-of-load 1.0V/1.2V core voltage for Altera FPGAs
  • Low-noise 1.8V/2.5V rail for RF and A/V circuits
  • Compact 3.3V to 1.5V conversion in space-constrained designs
  • Multi-rail distributed power with SYNC synchronization
  • High-density computing and networking board power
Manufacturer Part Number Package Notes
Altera/Intel EN5339QI QFN-38 3A low-profile replacement, newer
Altera/Intel EN5366QI QFN-38 6A version, same footprint concept
TI TPSM84421M0R B3QFN-25 4A module with integrated inductor
Monolithic Power MPM3690GQV-10 QFN-22 3A module, 6V input, integrated inductor
Richtek RTZ9203GQW QFN-24 3A integrated inductor module
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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