LT8705AEUHF

LT8705AEUHF is a high‑voltage buck/boost DC‑DC controller from Linear Technology (now Analog Devices). It is designed to regulate a wide input voltage to a stable output using external MOSFETs in a buck-boost topology, making it suitable for automotive and other harsh‑voltage environments.
Key features (typical):
- Buck/boost operation with current‑mode control for fast transient response
- Programmable switching frequency and adjustable compensation
- Protection: undervoltage lockout, overvoltage, overcurrent/short‑circuit, thermal shutdown
- Soft‑start and fault/enable controls
- Synchronization and robust gate drive capability for external MOSFETs
Package note:
- The suffix AEUHF denotes the specific package/temperature grade variant of LT8705 (EUHF is the package code used on the datasheet). It’s a lead‑free, automotive/industrial‑grade option.
Common applications:
- Automotive power rails, battery chargers, pre‑regulators, and any system needing both step-down and step-up from a single input.
If you share your input/output ranges and constraints, I can point to the exact specs in the datasheet and suggest configuration options.

Here are the typical features of LT8705AEUHF (high‑voltage buck/boost controller; automotive grade option in EUHF package):
- Wide input range: supports operation from a few volts up to about 60 V (suitable for automotive/industrial systems).
- Buck, boost, and buck–boost topologies (using external MOSFETs) for flexible output regulation.
- Fixed-frequency PWM control with programmable switching frequency (long‑cycle control for stability and transient response).
- Current‑mode control with cycle‑by‑cycle current limit for robust protection.
- Soft‑start and enable/disable control; adjustable output via feedback.
- Comprehensive protections: UVLO/OVLO, overcurrent/short‑circuit protection, over‑temperature with thermal shutdown.
- Fault reporting and latchable fault indication; power‑good signaling.
- Gate‑drive capability for external N‑channel MOSFETs; fast, efficient switching.
- Automotive/industrial grade option (A‑family) with suitable temperature and reliability margins.
- Available in an EUHF package (compact, thermally efficient).
Note: for exact voltage ranges, switching frequency, fault thresholds, and pinout, please refer to the datasheet.

LT8705AEUHF is in a 20-pin HTSSOP package with exposed pad (Pb-free).

- Pin count: 28 pins (EUHF package)
- Function: High‑voltage buck/boost DC‑DC controller (external MOSFETs) for automotive/industrial power supplies. Provides current‑mode control, wide input range (up to ~65V), programmable switching frequency, and protection features (UVLO, OVP, OCP, thermal).

The LT8705AEUHF is manufactured by Analog Devices, Inc. (the Linear Technology brand lineage; Linear Technology was acquired by Analog Devices).
Analog Devices is an American multinational semiconductor company that designs and manufactures analog, mixed-signal, and power-management integrated circuits.