Analog Devices extends its family of μModule regulators

Analog Devices LTM4691

Analog Devices has added a new device to its family of μModule voltage regulators. The LTM4691 is a complete dual 2 A output switching mode DC/DC power supply in a tiny 3 mm × 4 mm × 1.18 mm LGA package. Included in the package are the switching controller, power FETs, inductors and all supporting components. Operating over an input voltage range of 2.25 V to 3.6 V, the LTM4691 supports two outputs with programmable output voltage range from 0.5 V to 2.5 V set by external resistors. Its high efficiency design delivers up to 2 A continuous current on each output. Only bulk input and output capacitors are needed.

Analog Devices - LTM4691

The LTM4691 operates in forced continuous mode for low noise pulse-skipping mode or Burst Mode operation for high efficiency at lights loads. The typical buck switching frequency is 2 MHz and can be synchronized from 1 MHz to 3 MHz. Its high switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability.

Typical Application Circuit
Типовая схема включения.

Other features include precision run thresholds, a PGOOD signal, output overvoltage protection, thermal shutdown and output short-circuit protection. The LTM4691 is Pb-free and RoHS compliant.

Efficiency vs. Load Current
Efficiency vs. Load Current.

Features

  • Tiny Surface Mount, Low Profile 3 mm × 4 mm × 1.18 mm LGA Package
  • Input Voltage Range: 2.25 V to 3.6 V
  • Dual 2 A DC Output Current
  • ±1.5% Total Output Voltage Regulation
  • Current Mode Control, Fast Transient Response
  • External Frequency Synchronization
  • 180° Out-of-Phase Operation
  • Selectable Pulse-Skipping Mode/Burst Mode® Operation/Forced Continuous Mode
  • Power Good Indicator
  • Internal Soft-Start
  • Internal Compensation
  • Overvoltage, Overcurrent and Overtemperature Protection

Applications

  • Telecom, Networking and Industrial Equipment
  • Point-of-Load Regulation
  • FPGA, ASIC Core Supplies
Demonstration circuit 2910A for LTM4691 μModule
Demonstration circuit 2910A for LTM4691 μModule.
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