LTM4615 Series

Linear Technology and Digi-Key introduce the LTM4615 series of 36 V, 3 A Step-Down µModule Converters

Image of Linear Technology's LTM4615 SeriesLinear Technology's LTM4615 is a complete 4 A dual output switching mode DC/DC power supply plus an additional 1.5A VLDO (very low dropout) linear regulator. Included in the package are the switching controllers, power FETs, inductors, a 1.5 A regulator and all support components. The dual 4 A DC/DC converters operate over an input voltage range of 2.375 V to 5.5 V, and the VLDO operates from a 1.14 V to 3.5 V input. The LTM4615 supports output voltages ranging from 0.8 V to 5 V for the DC/DC converters and 0.4 V to 2.6 V for the VLDO. The three regulator output voltages are set by a single resistor for each output. Only bulk input and output capacitors are needed to complete the design.

The low profile package (2.82 mm) enables utilization of unused space on the bottom of PC boards for high density point of load regulation. High switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability. The device supports output voltage tracking for supply rail sequencing.

Features VLDO Section
  • Dual 4 A output power supply with 1.5 A VLDO™
  • Short-Circuit and over-temperature protection
  • Power good indicators

Switching Regulators Section - Current Mode Control

  • Input voltage range: 2.375 V to 5.5 V
  • 4 A DC typical, 5 A peak output current each
  • 0.8 V up to 5 V output each, parallel-able
  • ±2% total DC output error
  • Output voltage tracking
  • Up to 95% efficiency
  • Programmable soft-start
  • VLDO, 1.14 V to 3.5 V input range
  • VLDO, 0.4 V to 2.6 V, 1.5 A output
  • VLDO, 40 dB supply rejection at fsw
  • ±1% total DC output error
  • Small and very low profile package
  • 15 mm x 15 mm x 2.82 mm


  • Telecom and networking equipment
  • Industrial power systems
  • Low noise applications
  • FPGA, SERDES power

LTM4615 Series

ImageManufacturer Part NumberDescriptionAvailable Quantity
LTM4615EV#PBF datasheet linkIC SWIT REG BUCK 4A ADJ 144LGALTM4615EV#PBFIC SWIT REG BUCK 4A ADJ 144LGA549 - Immediate
LTM4615EV#PBF product page link
LTM4615IV#PBF datasheet linkIC SWIT REG BUCK 4A ADJ 144LGALTM4615IV#PBFIC SWIT REG BUCK 4A ADJ 144LGA125 - Immediate
LTM4615IV#PBF product page link
Published: 2012-06-29