LTC4370IDE#TRPBF

LTC4370IDE#TRPBF is the part number for Analog Devices’ LTC4370 high-side surge-stop/ideal-diode controller in Pb-free Tape & Reel packaging. It is designed to drive an external N-channel MOSFET to create an ideal diode with protection.
Key points
- Functions as reverse-polarity protection, short-circuit protection, and surge/overvoltage protection for a load.
- Provides current limiting and soft-start by sensing the MOSFET’s current (via a sense resistor) and controlling the gate.
- Latches off on fault and resumes when safe, protecting both source and load.
- Typically used for hot-swap/power-rail protection in automotive, telecom, battery, and other high-side power applications.
- IDE indicates the package variant; TRPBF means Tape & Reel, Pb-Free packaging.
Usage snapshot
- Connect VIN to supply, MOSFET as the pass element, sense resistor to set current limit, and LTC4370 drives the gate.

There isn’t an exact drop‑in equivalent. Closest functionally are hot‑swap/back‑to‑back MOSFET controllers such as TI’s TPS4370 (TPS4370A/B) and LM5060/LM5061. Other vendors (On Semiconductor, ST, etc.) offer similar reverse-polarity/hot-swap controllers. Use a cross‑reference search (DigiKey/Mouser) to match pinout and current specs.

Key features of LTC4370IDE#TRPBF (hot-swap controller with external MOSFET):
- High-side hot-swap control with programmable inrush/soft-start for controlled power-up
- External N‑channel MOSFET power path for efficient load switching
- Programmable current limit via sense resistor (protects against shorts and overloads)
- Protections: reverse current/ reverse battery protection, undervoltage lockout, overvoltage protection, overcurrent/short-circuit protection
- Thermal shutdown with fault indication
- Enable/disable control and fault status reporting
- Latch/retry behavior on fault and auto-retry after fault clears
- Suitable for power-path OR-ing, battery backup, and hot-swapped modules
- Pb-free, tape-and-reel (TRPBF) package variant for automated assembly
Note: For exact electrical specs (voltage range, current limit range, thresholds, timings), refer to the LTC4370 datasheet for the IDE#TRPBF variant.

- Pin count: 16 pins (LTC4370IDE in its IDE package).
- Function: High-side, reverse-battery protected hot-swap controller. It drives back-to-back external N-channel MOSFETs to create a protected, current-limited power path (an “ideal diode” style protection). Provides soft-start, overcurrent/short-circuit protection, undervoltage/overvoltage handling, and fault signaling. Requires external MOSFETs; the IC itself handles the control and protection logic.

- Manufacturer: Analog Devices, Inc. (ADI). The LTC4370IDE#TRPBF is an Analog Devices product; the LTC line originated with Linear Technology, which Analog Devices acquired in 2017.
- What kind of company: An American multinational semiconductor company specializing in analog, mixed-signal, and DSP integrated circuits (including power-management ICs).

- Hot-swap protection for servers, telecom and data-center power rails
- Ideal-diode OR’ing and load-switching for redundant supplies
- Reverse-current blocking and battery isolation in UPS, portable and automotive systems
- Inrush current control and surge protection for sensitive electronics
- Power-path management for multi-rail/backplane systems
- Over/undervoltage protection with safe power-down
- Battery charging and energy-harvesting (solar) power management

Package type: 16-lead TSSOP (SO-16) Pb-free, Tape-and-Reel packaging (TRPBF).