LT8390IFE

LT8390IFE is a high‑voltage, wide-input-range buck/boost controller from Linear Technology (now Analog Devices). It is designed to regulate outputs in buck, boost, or buck‑boost topologies using external MOSFETs and an inductor. It uses current‑mode PWM for regulation, with an adjustable oscillator, soft-start, and enable control.
Key features (typical):
- Wide input range suitable for automotive/industrial environments
- Current‑mode control for fast transient response
- Protection: overcurrent/short‑circuit, overvoltage, undervoltage, thermal shutdown
- Flexible output regulation and compensation network
Typical applications:
- Automotive and industrial power supplies where input can swing above or below the output
- Pre-regulators, battery-powered systems, chargers, and other non-isolated buck/boost designs
Note: the -IFE suffix indicates a specific package/grade option for this device. For exact electrical specs, pinout, and application notes, consult the LT8390IFE datasheet.

LT8390IFE is a high‑voltage buck/boost controller. Direct drop‑in cross references aren’t exact, but close equivalents include:
- TI LM5172 (65V, dual buck‑boost)
- TI LM5176 (65V, interleaved buck‑boost)
- Analog Devices/LTC LTC3780/LTC3782 (68V, external FETs)
- Maxim MAX1771/MAX1772 (buck‑boost controllers)
For a precise substitution, provide your required input/output range, power, and topology.

- Wide input range buck-boost LED driver controller
- Primary-side regulation (PSR), no optocoupler required
- Internal high-side switch in a fixed-frequency topology
- External sense resistor sets LED current (constant-current output)
- Dimming: PWM and analog dimming support
- Protections: overvoltage/undervoltage, cycle-by-cycle current limit, short-circuit protection, thermal shutdown
- High efficiency with minimal external components
- Suitable for non-isolated LED lighting apps (automotive and universal input)

- Pin count: 28 pins (LT8390IFE comes in a 28‑pin package)
- Function: High‑voltage DC‑DC controller for non‑isolated buck/boost (and buck‑boost/SEPIC) converters, using fixed‑frequency, current‑mode control. It drives external MOSFETs to regulate input voltage to a desired output and includes protection and fault/status features.

The LT8390IFE is manufactured by Analog Devices, Inc. (ADI). Analog Devices is a global American semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits; it acquired Linear Technology (the origin of the LT parts) in 2017.

LT8390IFE is a wide-input buck-boost controller for LED drivers and DC-DC regulation. Common applications:
- Automotive LED lighting (headlamps, taillights, interior)
- Industrial and architectural LED lighting, signage, backlighting
- Solar-powered or off-grid lighting systems
- Battery-powered equipment and portable power supplies
- General nonisolated buck-boost DC-DC power supplies for wide-input systems (telecom, industrial, adapters)
Concise and versatile for high-efficiency LED drive with wide input ranges.

LT8390IFE comes in an 8-pin MSOP package (MSOP-8, roughly 3x3 mm).