LTC7124 17 V, Dual 3.5 A Synchronous Step-Down Regulator

Spread spectrum modulation reduces EMI in Linear Technology's compact 3 mm x 5 mm QFN step-down regulator

Image of Linear Technology's LTC7124 17 V Dual 3.5 A Synchronous Step-Down RegulatorLinear Technology's LTC7124 is a dual-channel, 3.5 A per output, high efficiency monolithic step-down regulator capable of operating from input supplies up to 17 V. The programmable switching frequency ranges from 500 kHz to 4 MHz with a ±25% external clock synchronization capability around the programmed frequency. The regulator features ultra-low quiescent current for high efficiency over a wide VOUT range.

The step-down regulator operates from an input voltage range of 3.1 V to 17 V and provides an adjustable output range from 0.6 V to 99% of VIN while delivering up to 3.5 A of output current per channel. A user selectable mode input is provided to allow the user to trade off output ripple for light load efficiency; Burst Mode® operation provides the highest efficiency at light loads, while forced continuous operation provides the lowest output ripple. The LTC7124 includes spread spectrum modulation for low radiated and conductive noise. The LTC7124 is offered in a thermally enhanced, low-profile, 24-lead, 3 mm x 5 mm QFN package.

Typical Application
Output Current Capability
Image of Linear Technology's LTC7124 17 V Dual 3.5 A Synchronous Step-Down Regulator
Image of Linear Technology's LTC7124 17 V Dual 3.5 A Synchronous Step-Down Regulator
Features
  • Wide VIN range: 3.1 V to 17 V
  • Wide VOUT range: 0.6 V to 99% VIN
  • Integrated 80 mΩ/40 mΩ N-channel MOSFETs. provide up to 95% efficiency
  • No-load IQ < 8 µA with both channels enabled; IQ < 5.5 µA with only one channel enabled
  • Programmable frequency (500 kHz to 4 MHz) with ±25% frequency synchronization range
  • Dual step-down outputs: 3.5 A per channel 
  • Configurable for a 2-phase single output at up to 7 A
  • ±1.0% output voltage accuracy
  • Current mode operation for excellent line and load transient response
  • Internal or programmable external loop compensation
  • Available in a 3 mm x 5 mm QFN-24 package
Applications
  • Battery-powered systems
  • Point-of-load supplies
  • Portable instruments
  • Handheld scanners

LTC7124 17 V, Dual 3.5 A Synchronous Step-Down Regulator

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
LTC7124EUDD#PBF datasheet linkIC REG BUCK ADJ 17V 3.5A SYNC 24LTC7124EUDD#PBFIC REG BUCK ADJ 17V 3.5A SYNC 24138 - Immediate
LTC7124EUDD#PBF product page link
LTC7124IUDD#PBF datasheet linkIC REG BUCK ADJ 17V 3.5A SYNC 24LTC7124IUDD#PBFIC REG BUCK ADJ 17V 3.5A SYNC 2473 - Immediate
LTC7124IUDD#PBF product page link

Demo Board

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
DC2329A datasheet linkDEMO BOARD FOR LTC7124DC2329ADEMO BOARD FOR LTC71243 - Immediate
DC2329A product page link
Published: 2017-12-26