LT8350
40VIN, 18VOUT, 6A Synchronous Buck-Boost Silent Switcher
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Overview
Features and Benefits
- 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
- Silent Switcher® Architecture for Low EMI
- Up to 95% Efficiency at 2MHz
- Proprietary Peak Current Mode
- 3V to 40V Input Voltage Range
- 1V to 18V Output Voltage Range
- ±1.5% Output Voltage Regulation
- Output/Input Current Regulation and Monitor
- Constant-Voltage/Constant-Current Regulation
- High Side PMOS Load Switch Driver
- No Top MOSFET Refresh Noise in Buck or Boost
- 200kHz to 2MHz Fixed Switching Frequency with External Frequency Synchronization and SSFM
- VOUT Disconnected from VIN During Shutdown
- Small 4mm × 6mm 32-Pin LQFN Package
- AEC-Q100 Qualification in Progress
Product Details
The LT8350 is a monolithic 4-switch synchronous buck-boost converter with Silent Switcher architecture to minimize EMI emissions while delivering high efficiency at high switching frequency. The switcher can regulate the output voltage, input or output current from input voltages above, below, or equal to the output voltage. The proprietary peak current mode control scheme allows adjustable and synchronizable 200kHz to 2MHz fixed frequency operation, or spread spectrum frequency modulation (SSFM) operation. With 3V to 40V input voltage range, 1V to 18V output voltage capability, and seamless low noise transitions between operation regions, the LT8350 is ideal for voltage regulator, battery and supercapacitor charger applications in automotive, industrial, telecom, and battery powered systems.
The LT8350 provides input or output current monitor and power good flag. Robust fault protection is provided to detect output short-circuit condition, during which the LT8350 retries, latches off, or keeps running.
APPLICATIONS
- Automotive, Industrial, Telecom Systems
- Voltage Regulator with Accurate Current Limit
- High Frequency Battery-Powered System
- USB-PD Source
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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EVAL-LT8350-AZ - Demo Manual (Rev. 0)4/13/2022PDF1 M
Tools & Simulations
LTspice
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
LT8350
LTpowerCAD
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Design tools for the following parts are available in LTpowerCAD:
LT8350
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LT8350RV#PBF | Material Declaration | Reliability Data | 32(28)-Lead LQFN (6mm x 4mm x 0.94mm) | |
| Wafer Fabrication Data |
Support & Discussions
Sample & Buy
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Buy Now Pricing
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List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.