LT8471 Dual Multitopology Converter with 2 A Switches

Dual multi-topology DC/DC converters with 2 A switches and synchronization from Linear Technology

Image of Linear Technology's LT8471 DC/DC ConvertersThe LT®8471 from Linear Technology is a dual-PWM DC/DC converter containing two internal 2 A, 50 V switches and an additional 500 mA switch to facilitate step-down and inverting conversion. Each 2 A channel can be independently configured as a buck, boost, SEPIC, flyback, or inverting converter. Capable of generating positive and negative outputs from a single input rail, the LT8471 is ideal for many local power-supply designs.

The LT8471 has an adjustable oscillator, set by a resistor placed from the RT pin to ground. Additionally, the LT8471 can be synchronized to an external clock. The free-running or synchronized-switching frequency range of the part can be set between 100 kHz and 2 MHz.

Additional features such as frequency foldback, soft-start, and power good are integrated. The LT8471 is available in a 20-lead TSSOP package.

Features
  • Dual 2 A and one 500 mA, 50 V internal power switch channels
  • 2 A primary channels can be buck, boost, SEPIC, ZETA, flyback or inverting DC/DC converter
  • 500 mA skyhook channel efficiently generates boosted input voltage
  • Wide input voltage range of 2.6 V to 50 V
  • UVLO and OVLO programmable on OV/UV pin
  • Soft-start programmable for each channel
  • Fixed frequency PWM (set by RT pin or synchronized to external clock)
  • Anti-phase switching reduces input ripple
  • 20-lead TSSOP package

One Switcher Does It All

LT8471 Dual Multitopology Converter with 2 A Switches Video

Product Photos

LT8471 Typical Application

LT8471 Diagram

Image of Linear Technology's LT8471 Efficiency Graph
LT8471 Dual Multitopology Converter with 2A Switches
ImageManufacturer Part NumberDescriptionFunctionOutput ConfigurationAvailable QuantityBuy Now
IC REG MULT CONFIG INV 20TSSOPLT8471EFE#PBFIC REG MULT CONFIG INV 20TSSOPStep-Up, Step-Down, Step-Up/Step-DownPositive or Negative399 - Immediate
IC REG MULT CONFIG INV 20TSSOPLT8471IFE#PBFIC REG MULT CONFIG INV 20TSSOPStep-Up, Step-Down, Step-Up/Step-DownPositive or Negative253 - Immediate
Eval Board
ImageManufacturer Part NumberDescriptionMain PurposeOutputs and TypeAvailable QuantityBuy Now
BOARD EVAL FOR LT8471EFEDC1854ABOARD EVAL FOR LT8471EFEDC/DC, Negative Inverter2, Non-Isolated4 - Immediate
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Published: 2014-03-05