LT8471
RECOMMENDED FOR NEW DESIGNSDual Multitopology DC/DC Converters with 2A Switches and Synchronization
- Part Models
- 10
- 1ku List Price
- Starting From $5.67
Overview
- Dual 2A and One 500mA, 50V Internal Power Switch Channels
- 2A Primary Channels Can Be Buck, Boost, SEPIC, ZETA, Flyback or Inverting DC/DC Converter
- 500mA Skyhook Channel Efficiently Generates Boosted Input Voltage
- Wide Input Voltage Range of 2.6V to 50V
- 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 and 28-Lead QFN Packages
The LT8471 is a dual PWM DC/DC converter containing two internal 2A, 50V switches and an additional 500mA switch to facilitate step-down and inverting conversion. Each 2A 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 100kHz and 2MHz.
Additional features such as frequency foldback, soft-start, and power good are integrated. The LT8471 is available in 20-lead TSSOP and 28-Lead (4mm × 5mm) QFN packages.
Applications
- Dual Rail Power for Signal Chain.
- Buck/Buck, Buck/Boost, Boost/Boost, Boost/Invert, Invert/Invert, Buck/Invert
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
Video 1
Brochure 1
3rd Party Solutions 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT8471EFE#PBF | 20-Lead TSSOP w/ EP | ||
| LT8471EFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LT8471EUFD#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LT8471EUFD#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LT8471HFE#PBF | 20-Lead TSSOP w/ EP | ||
| LT8471HFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LT8471IFE#PBF | 20-Lead TSSOP w/ EP | ||
| LT8471IFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LT8471IUFD#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LT8471IUFD#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LT8471EFE#PBF | PRODUCTION | |
| LT8471EFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT8471EFE#PBF | PRODUCTION | |
| LT8471EFE#TRPBF | PRODUCTION | |
| LT8471HFE#PBF | PRODUCTION | |
| LT8471HFE#TRPBF | PRODUCTION | |
| LT8471IFE#PBF | PRODUCTION | |
| LT8471IFE#TRPBF | PRODUCTION | |
|
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LT8471EUFD#PBF | PRODUCTION | |
| LT8471EUFD#TRPBF | PRODUCTION | |
| LT8471HFE#PBF | PRODUCTION | |
| LT8471HFE#TRPBF | PRODUCTION | |
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LT8471HFE#PBF | PRODUCTION | |
| LT8471HFE#TRPBF | PRODUCTION | |
| LT8471IFE#PBF | PRODUCTION | |
| LT8471IFE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT8471
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LT8471EFE Demo Board | Dual Buck/Inverting, 6V ≤ VIN ≤ 32V, VOUT1 = 5V @ 1.4A, VOUT2 = -5V @ 0.8A