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Analog Devices Inc. LTM4732 Step-Down μModule® Regulators

Analog Devices LTM4732 Step-Down μModule® Regulators are complete 4A step-down Silent Switcher® 3 power μModule (micromodule) regulators in a tiny 6.25mm × 4mm × 1.92mm ball grid array (BGA) package. The package includes the switching controller, the power MOSFETs, an inductor, and the supporting components. Operating over an input voltage range of 3V to 16V, the LTM4732 supports an output range of 0.3V to 6V. A single resistor sets the output voltage, enabling unity-gain operation over the output range and resulting in virtually constant output noise independent of the output voltage. Only the bulk input and output capacitors are required to complete the design.

The Analog Devices LTM4732 utilizes the Silent Switcher 3 architecture, incorporating internal hot loop bypass capacitors, to achieve low electromagnetic interference (EMI) and high efficiency. Additionally, the LTM4732 has an ultra-low noise architecture to obtain exceptionally low-frequency (<100kHz) output noise. The low electromagnetic interference (EMI) and low-noise features make the LTM4732 ideal for noise-sensitive applications that require a high-efficiency synchronous switching regulator. The LTM4732 is available with a RoHS-compliant terminal finish.

Features

  • Complete solution in <1cm2 (single-sided PCB) or 0.5cm2 (dual-sided PCB)
  • Low-noise Silent Switcher 3 architecture
    • Ultra-low EMI emissions
    • Ultra-low RMS noise (10Hz to 100kHz) of 4μVRMS
  • ±1.5% maximum total DC output voltage error over line, load, and temperature
  • 3V to 16V input voltage range
  • 0.3V to 6V output voltage range
  • 4A maximum continuous output current
  • Adjustable and synchronizable from 400kHz to 4MHz
  • Current mode control, fast transient response
  • Forced continuous mode capability
  • Multiphase parallel with current sharing
  • Programmable power good
  • Available in a tiny 28-pin 6.25mm × 4mm × 1.92mm BGA package

Applications

  • Telecom, networking, and industrial equipment
  • RF power supplies: PLLs, VCOs, mixers, LNAs, PAs
  • Low-noise instrumentation
  • High-speed/high-precision data converters

Typical Application

Application Circuit Diagram - Analog Devices Inc. LTM4732 Step-Down μModule® Regulators
Published: 2025-06-03 | Updated: 2025-06-11