Analog Devices Inc. LT1910ES8#TRPBF

Overview

LT1910ES8#TRPBF from Analog Devices (formerly Linear Technology) is a fault-protected high-side N-channel MOSFET driver IC designed for industrial, automotive, and avionics power switching. It integrates a self-contained charge pump to drive the gate 12 V above V+, supports 8 V–48 V supply range, provides 65 mV drain-sense current limit threshold with 0.33%/°C TC, and features automatic restart timer with external CT control. It is used in electronic circuit breakers and solenoid drivers where robust overcurrent protection is critical.

For engineers reviewing the LT1910ES8#TRPBF datasheet, LT1910ES8#TRPBF pinout, LT1910ES8#TRPBF application, or LT1910ES8#TRPBF equivalent, key selection considerations include its –15 V to 60 V supply transient immunity, open-collector FAULT flag behavior, SO-8 package thermal resistance (θ_JA = 150 °C/W), and programmable current-limit delay via RC network on SENSE pin.

Technical Context

The LT1910ES8#TRPBF implements a supply-referenced current-sense architecture: the SENSE pin compares voltage across an external drain-sense resistor against an internal 65 mV reference offset from V+, with temperature compensation matching copper trace shunts. Its integrated 750 kHz charge pump generates gate drive up to 15 V above V+ (e.g., 32 V at V+ = 24 V), enabling full enhancement of standard N-channel MOSFETs without external components.

Overcurrent protection operates via fast (<50 µs) current-limit turn-off, followed by automatic restart governed by a 14 µA current source charging an external timing capacitor (CT) to a 2.9 V threshold. The FAULT pin asserts low when TIMER falls below 3.3 V and resets high only after TIMER ramps above 3.4 V - ensuring reliable fault latching and logic-level interfacing via open-collector output.

Key Specifications

Pinout & Package

LT1910ES8#TRPBF is housed in an 8-lead plastic SO (SO-8, narrow 0.150") package with exposed pad not electrically connected. 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 and LTC1477, LT1910ES8#TRPBF uniquely combines wide 8 V–48 V operation, 60 V transient survival, external MOSFET control, and PCB-shunt-ready current sensing - making it optimal for ruggedized, field-serviceable high-current switching where design flexibility and fault resilience are prioritized.

Availability

LT1910ES8#TRPBF is available at Aetrix Electronics and suitable for industrial control panels, automotive solenoid drivers, avionics power sequencers, and stepper motor phase switches requiring stable component supply across extended temperature and transient conditions.

Supply support for LT1910ES8#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, datasheet archives, and application engineering for legacy Linear parts including the LT1910 family.

The LT1910 product line was engineered specifically for fault-tolerant high-side power switching in harsh environments - emphasizing supply transient immunity, self-contained gate drive, and precision current limiting without external passive components.

FAQ

What is the maximum supply voltage the LT1910ES8#TRPBF can withstand without damage?

The LT1910ES8#TRPBF is 100% tested and guaranteed to survive supply transients from –15 V to +60 V applied between V+ and GND pins. Exceeding 60 V - even for microseconds - risks catastrophic failure. For systems prone to >60 V spikes (e.g., automotive load dump), a transient voltage suppressor like SMAJ48A must be placed directly across V+ and GND. This rating applies to LT1910ES8#TRPBF regardless of operating temperature or load condition.

How does the LT1910ES8#TRPBF implement current limiting without an external sense amplifier?

The LT1910ES8#TRPBF uses an internal supply-referenced comparator with a precise 65 mV threshold offset. The SENSE pin connects directly to the MOSFET drain, while the V+ pin serves as the Kelvin reference to the positive side of the external sense resistor. When the voltage drop across the resistor exceeds 65 mV, the comparator triggers immediate gate turn-off. No external op-amp or gain-setting resistors are needed - this architecture is intrinsic to LT1910ES8#TRPBF's design.

Can the LT1910ES8#TRPBF drive logic-level MOSFETs at low supply voltages?

Yes - the LT1910ES8#TRPBF's charge pump delivers sufficient gate voltage (≥12 V above V+) down to 8 V supply, enabling full enhancement of logic-level N-channel MOSFETs (e.g., IRF7470, Si2302). At V+ = 8 V, GATE reaches ~20 V, well above typical V_GS(th) of 1 V–2.5 V. Standard MOSFETs require ≥10 V V_GS for R_DS(on) spec; LT1910ES8#TRPBF ensures this across its entire 8 V–48 V range.

What is the purpose of the TIMER pin, and how is the restart period calculated?

The TIMER pin controls automatic restart after overcurrent: during fault, it discharges to <1 V, then recharges via a 14 µA internal current source to 2.9 V to attempt restart. Restart period T_RESTART ≈ (2.9 V × C_T) / 14 µA. For example, C_T = 1 µF yields ~207 ms. This timing function is fundamental to LT1910ES8#TRPBF's fault recovery behavior and is independent of input signal state.

Is the LT1910ES8#TRPBF suitable for low-side switching applications?

Yes - though optimized for high-side use, LT1910ES8#TRPBF can drive low-side N-MOSFETs with a Zener clamp (e.g., 15 V) from GATE to source to prevent V_GS exceedance. Current sensing requires either load-return-to-supply (Figure 8a) or op-amp level-shifting of source voltage to SENSE pin (Figure 8b). All protection features - including FAULT flag and restart timer - remain fully functional in low-side configurations of LT1910ES8#TRPBF.