Diodes Incorporated NIS5135MN2-FN-7

Overview

NIS5135MN2-FN-7 from Diodes Incorporated is a self-protected, auto-retry thermal shutdown electronic fuse with integrated 30 mΩ NMOS power device, 3.1–18 V input range, 3.6 A continuous current rating at +25°C, and overvoltage clamp at 6.65 V. It serves as a load protection switch in SSD power rails and motherboard 5V distribution.

For engineers reviewing the NIS5135MN2-FN-7 datasheet, NIS5135MN2-FN-7 pinout, NIS5135MN2-FN-7 application, or NIS5135MN2-FN-7 equivalent, key selection criteria include thermal shutdown behavior (auto-retry vs latching), dv/dt ramp control, Kelvin vs direct current sensing configuration, and ILIMIT resistor-based current threshold setting.

Technical Context

The NIS5135MN2-FN-7 integrates an NMOS power switch with programmable current limiting via external resistor on ILIMIT pin, internal dv/dt ramp control (2 ms typical with no capacitor), and tri-state Enable/Fault pin supporting system-wide thermal fault chaining. Its overvoltage clamp activates at 6.65 V without shutdown, preserving load operation during transients.

Thermal protection uses a +175°C trip point with +45°C hysteresis for auto-retry recovery; undervoltage lockout engages below 3.6 V (typical) with 0.4 V hysteresis. The device operates across –40°C to +150°C junction temperature and supports both direct and Kelvin current sensing topologies.

Key Specifications

Pinout & Package

Package: U-DFN3030-10 (3.0 mm × 3.0 mm, 0.6 mm height, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar electronic fuse applications.

Compared with NIS5135MN1-FN-7, the MN2 variant provides autonomous recovery ideal for unattended storage devices; versus TPS25940ARVCR, it trades telemetry for robust overvoltage clamping and lower R_DS(ON) in cost-sensitive 5V applications.

Availability

NIS5135MN2-FN-7 is available at Aetrix Electronics and suitable for hard disk drives, solid state drives, and motherboard power management requiring stable component supply with automotive-grade thermal resilience and RoHS compliance.

Supply support for NIS5135MN2-FN-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The NIS5135 belongs to Diodes' eFuse product line, engineered specifically for high-reliability load protection in consumer storage, computing, and peripheral equipment where compact size, thermal autonomy, and transient immunity are critical.

FAQ

What is the thermal shutdown behavior of NIS5135MN2-FN-7?

The NIS5135MN2-FN-7 features auto-retry thermal shutdown with a +175°C trip point and +45°C hysteresis. When the junction temperature exceeds +175°C, the device disables the NMOS power switch and holds off until the die cools to +130°C, then automatically resumes operation with full dv/dt-controlled soft-start. This eliminates need for external reset circuitry in fan or SSD applications.

How does the ILIMIT pin set current thresholds?

The ILIMIT pin sets both short-circuit and overload current limits using an external resistor between any Source pin and ILIMIT. With R_LIMIT = 11 Ω, the device delivers 3.1 A typical short-circuit limit and 3.5 A typical overload limit. The relationship is inverse: lower resistor values increase current thresholds, per characterization curves in DS37968 Rev. 4–3.

Can NIS5135MN2-FN-7 be used with 12V input supplies?

Yes - the NIS5135MN2-FN-7 supports 3.1 V to 18 V input voltage range. At 12 V, its overvoltage clamp activates at 6.65 V, limiting output to protect downstream 5V logic. Continuous current derates to ~2.2 A at +80°C ambient (per datasheet Table 2), requiring adequate PCB copper area for thermal management.

What is the purpose of the dv/dt pin and how is it configured?

The dv/dt pin controls output voltage slew rate during enable. With no external capacitor, internal 90 µA current source yields ~2 ms ramp time. Adding a ceramic capacitor extends ramp linearly: t_ramp ≈ C_ext × 11.1 V/ms. This prevents inrush-induced supply droop and false UVLO in high-capacitance loads like SSDs with 70 µF bulk capacitance.