Analog Devices Inc. LT1910IS8#TRPBF

Overview

LT1910IS8#TRPBF from Analog Devices (formerly Linear Technology) is a fault-protected high-side N-channel MOSFET gate driver IC designed for industrial, avionics, and automotive power switching. It integrates a self-contained 750kHz charge pump to drive the gate up to 15V above V+, supports 8V–48V supply range, withstands –15V to 60V supply transients, and features programmable current-limit trip (65mV sense threshold), automatic restart timer, and open-collector FAULT flag. It enables robust electronic circuit breaker functionality in harsh environments.

For engineers reviewing the LT1910IS8#TRPBF datasheet, LT1910IS8#TRPBF pinout, LT1910IS8#TRPBF application, or LT1910IS8#TRPBF equivalent, this page delivers verified technical context, SO-8 package mapping, real-world timing behavior (tON = 100–400 µs, tOFF = 25–100 µs), fault recovery dynamics, and precise design meaning for each key specification - all validated against Linear Technology's official documentation and electrical characteristics tables.

Technical Context

The LT1910IS8#TRPBF implements a supply-referenced current-sense architecture with a fixed 65mV nominal threshold at the SENSE pin, temperature-compensated at 0.33%/°C to match copper PCB shunts. Its internal charge pump generates gate voltage up to 15V above V+ without external components, enabling full enhancement of standard N-channel MOSFETs in high-side configurations.

Overcurrent protection operates via a comparator-driven latch mechanism: when drain current exceeds the setpoint, the TIMER pin is rapidly discharged below 2.9V, forcing GATE low and asserting FAULT (open-collector, active-low). A 14µA current source then recharges the external timing capacitor CT until the 2.9V threshold is reached, initiating automatic restart - repeating until fault clearance.

Key Specifications

Pinout & Package

LT1910IS8#TRPBF is housed in an 8-lead plastic SO (Small Outline) package, narrow body (0.150"), with exposed pad not present. Pin 1 is marked by bevel edge or dimple; lead finish is lead-free (Pb-free), RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side MOSFET driver applications.

Compared with LTC1155, LT1910IS8#TRPBF delivers wider supply range, superior transient immunity, and true single-chip high-side drive without external components; versus LT1161, it offers smaller footprint and lower cost for single-switch implementations while retaining identical protection architecture and temperature rating.

Availability

LT1910IS8#TRPBF is available at Aetrix Electronics and suitable for industrial motor control, automotive solenoid drivers, avionics power distribution, electronic circuit breakers, and harsh-environment embedded systems requiring stable component supply across extended temperature ranges.

Supply support for LT1910IS8#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices acquired Linear Technology in 2017 and maintains full product support, datasheets, and application notes for legacy Linear parts including the LT1910 family.

The LT1910 product line was engineered specifically for ruggedized high-side power switching in automotive, avionics, and industrial settings - emphasizing fault resilience, wide supply tolerance, and integration of protection logic without external components.

FAQ

What is the maximum supply voltage the LT1910IS8#TRPBF can withstand without damage?

The LT1910IS8#TRPBF is 100% tested and guaranteed to survive supply transients from –15V to +60V applied between V+ and GND pins. Exceeding +60V - even momentarily - risks catastrophic failure. For systems prone to load dump or inductive kickback, a transient voltage suppressor (e.g., SMAJ48A) must be placed directly across V+/GND. This absolute maximum rating is independent of operating voltage and applies to all grades including the I-grade LT1910IS8#TRPBF.

How does the LT1910IS8#TRPBF implement current limiting without external sense amplifiers?

The LT1910IS8#TRPBF uses an internal supply-referenced comparator with a fixed 65mV threshold connected to the SENSE pin. When the voltage drop across an external sense resistor (placed between MOSFET source and ground) exceeds 65mV, the comparator triggers immediate GATE turn-off and TIMER discharge. The V+ pin serves as the Kelvin reference for this measurement - it must connect to the same node as the resistor's high-side terminal to reject common-mode errors. No op-amps or gain-setting resistors are needed.

Can the LT1910IS8#TRPBF drive logic-level MOSFETs at 8V supply?

Yes - the LT1910IS8#TRPBF's charge pump is specified down to 8V supply and can generate sufficient gate voltage (≥10V above V+) to fully enhance logic-level N-channel MOSFETs with VGS(th) ≤ 2.5V. At V+ = 8V, typical VGATE – V+ is 4–6V; at V+ = 12V, it rises to 7–8.5V; and at V+ ≥ 24V, it reaches 10–15V. For reliable turn-on at minimum supply, select MOSFETs with RDS(on) guaranteed at VGS = 10V and verify gate drive strength using the IGATE vs VGATE curves in the datasheet.

What is the purpose of the TIMER pin, and how do I select the timing capacitor CT?

The TIMER pin controls the automatic restart delay after overcurrent shutdown. An external capacitor CT is charged by a 14µA current source from <1V to 2.9V; time to reach threshold determines off-time. Typical values: CT = 0.1µF → ~10ms, CT = 1µF → ~100ms, CT = 3.3µF → ~300ms. Select CT based on required fault hold-off duration - longer delays prevent nuisance tripping on inrush, shorter delays improve system responsiveness. Use X7R or C0G dielectric for stable timing across temperature.

Is the LT1910IS8#TRPBF pin-compatible with other Linear high-side drivers like the LT1161?

No - the LT1910IS8#TRPBF uses an SO-8 package with unique pinout (e.g., GND at Pin 1, TIMER at Pin 2, FAULT at Pin 3), while the quad-channel LT1161 uses SO-16 with different pin assignments and functions. There is no pin-to-pin or functional drop-in replacement within the Linear portfolio. Substitution requires PCB redesign and validation of timing, drive strength, and protection behavior - always consult the respective datasheets before interchanging LT1910IS8#TRPBF with any alternative part.