LT8390IUFD#TRPBF

The LT8390 is a high-efficiency, wide-input-range DC-DC controller from Linear Technology (Analog Devices) used to implement buck, boost, or buck-boost converters with external MOSFETs. It uses current‑mode PWM, supports synchronous rectification, and offers programmable switching frequency, soft-start, and comprehensive protection (overcurrent, overvoltage/UVLO, thermal shutdown).
Key points
- Topologies: buck, boost, or buck-boost (external FETs required)
- Features: wide input range, current-mode control, soft-start, protection circuitry
- Applications: automotive power rails, battery-powered systems, solar chargers, LED drivers, portable power
- Packaging suffixes: IUFD#TRPBF denotes a specific industrial/variant package and manufacturing format; TRPBF indicates Tape-and-Reel, RoHS-compliant, lead-free
For exact electrical specs, pinout, and application notes, refer to the LT8390 datasheet on Analog Devices’ website.

Here are the key features of the LT8390IUFD#TRPBF (typical for LT8390 family):
- High-voltage, four‑switch synchronous buck/boost LED driver topology for wide input and LED voltage ranges.
- Integrated MOSFETs reduce external parts count; supports buck, boost, and buck-boost operation.
- Constant-current LED regulation with current set by an external sense resistor.
- Dimming: supports PWM and analog dimming inputs for brightness control.
- Protections: cycle-by-cycle current limit, overcurrent/overvoltage protection, short/open LED protection, thermal shutdown.
- Soft-start and current-limit ramp to minimize inrush and LED current overshoot.
- Adjustable switching frequency (external resistor) for optimization of efficiency and size.
- Stable operation with robust loop compensation for a wide load range.
- Wide operating temperature (I/UF variants) and package designed for tape-and-reel manufacture (TRPBF).
- Typical applications: automotive/industrial LED drivers, backlighting, and other high-voltage LED lighting.
Note: For exact electrical limits (input range, LED current, freq bands) refer to the datasheet for this specific lot/packaging.

Pb-free QFN package (with exposed pad), delivered in Tape-and-Reel format.

- Pin count: 24 pins (DFN-24).
- Function: High‑voltage dual synchronous buck/boost controller. It drives two external N‑channel MOSFETs for a buck, boost, or buck‑boost converter, with current‑mode control and separate feedback paths (FB1/FB2) for possibly two outputs. Includes enable/shutdown, frequency set (RT), current limit (ILIM), current sense (IS), compensation (COMP), reference, VIN, GND, and switch‑node pins (LX1/LX2).

Manufacturer: Analog Devices, Inc. (ADI). The LT8390IUFD#TRPBF is from the Linear Technology line, now part of ADI after its 2017 acquisition.
Company type: A multinational American semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing integrated circuits for industrial, automotive, communications, consumer, and other markets.

LT8390IUFD#TRPBF is a high-efficiency, wide-input, non-isolated synchronous buck–boost DC-DC controller. Typical application areas:
- Automotive power supplies and load-dump tolerant DC-DC channels
- Industrial control and motor-drive power rails
- Solar/battery-management front ends (MPPT and charging)
- Telecom/data equipment DC-DC rails
- Portable or ruggedized devices with wide input ranges
- Uninterruptible/backup power and energy-harvesting systems