RSM3204

Compact 2A Power Module for High-Density Embedded Designs

The RSM3204 is a fully integrated 2A DC/DC power module that combines a high-efficiency synchronous buck converter and integrated inductor into a compact 2.0mm × 2.5mm LGA package. Designed for space-constrained applications, it simplifies power supply design by minimizing external components while delivering excellent efficiency, fast transient response, and reliable operation.

Supporting a 2.4V to 5.5V input voltage range and switching frequencies up to 4MHz, the module enables compact power solutions with smaller external capacitors and reduced PCB area. Automatic PFM/PWM operation maximizes efficiency under varying load conditions, while an optional Forced PWM mode provides consistent switching frequency for noise-sensitive applications.

Ideal for portable electronics, optical modules, industrial IoT, and embedded systems, this highly integrated solution shortens development time while simplifying PCB layout and improving manufacturing consistency.

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Simplify High-Density Power Design

Integrating the power converter and inductor into a single package eliminates one of the largest external components found in conventional buck converter designs. This reduces component count, simplifies PCB layout, and helps accelerate product development.

Integrated Inductor Reduces Solution Size

Unlike discrete power supplies that require a separate inductor, the module integrates the magnetic component inside the package, reducing PCB area while improving layout consistency.

High-Frequency Operation

Operating at switching frequencies up to 4MHz, the module allows designers to use smaller external capacitors while maintaining fast transient response and excellent efficiency.

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Flexible Performance for Modern Electronics

Designed for both battery-powered and regulated power rails, the module combines efficient operation with configurable output voltage options.

Wide Input Voltage Range

Supporting 2.4V to 5.5V input voltages, the module is compatible with USB power sources, single-cell lithium-ion batteries, and regulated intermediate power rails.

Automatic or Forced PWM Operation

Choose the operating mode best suited to your application:

• Automatic PFM/PWM mode for maximum efficiency across varying load conditions.
• Forced PWM mode for applications requiring constant switching frequency and reduced output ripple.

Factory-Trimmed Output Voltage Options

Multiple trim options simplify output voltage selection while minimizing the number of required external components.

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Integrated Features Improve Reliability

Integrated monitoring and protection functions reduce external circuitry while improving overall system robustness.

Integrated System Functions

The module includes:

• Up to 2A continuous output current
• ±1% output voltage accuracy
• Power Good (PG) output
• Integrated output discharge

Built-In Protection

Integrated protection includes:

• Overcurrent protection (OCP)
• Short-circuit protection (SCP)

These features improve reliability while helping protect both the module and downstream circuitry during fault conditions.

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Compact Integration for Space-Constrained Applications

The compact 2.0mm × 2.5mm × 1.1mm LGA package combines the converter and inductor into a highly integrated solution that significantly reduces PCB area compared to traditional discrete implementations.

The result is a compact power solution that simplifies layout, shortens development time, and improves manufacturing consistency.

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Part of the RSM3203/3204/3205 Power Module Family

The RSM3204 is the 2A member of Reed Semiconductor’s compact DC/DC power module family. All three devices share the same integrated architecture, package, operating modes, and protection features while providing different output current capabilities.

Using a common package and architecture allows designers to scale output current with minimal PCB redesign, simplifying product development and inventory management.

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Explore Reed’s Integrated Power Modules

The RSM3204 is part of Reed Semiconductor’s family of integrated DC/DC power modules designed to simplify power supply development while maximizing power density. Reed also offers higher-current power modules, synchronous buck converters, PMBus™ digital regulators, multiphase controllers, Smart Power Stages, and Power Blocks, providing complete power solutions for applications ranging from portable electronics and industrial automation to AI infrastructure and high-performance computing.