Diodes Incorporated NIS5132MN1-FN-7

Overview

NIS5132MN1-FN-7 from Diodes Incorporated is a self-protected, resettable electronic fuse with latching thermal shutdown, designed for 9–18V input systems requiring robust overcurrent, overvoltage, and thermal protection. It integrates a 30mΩ typical R_DS(ON) NMOS power device, internal current limit (3.44A typical short-circuit threshold), undervoltage lockout (8.5V typ), and overvoltage clamp (15V typ), and is used in hard disk drive power rails and industrial motherboard power management.

For engineers reviewing the NIS5132MN1-FN-7 datasheet, NIS5132MN1-FN-7 pinout, NIS5132MN1-FN-7 application, or NIS5132MN1-FN-7 equivalent, key selection criteria include its U-DFN3030-10 package footprint, tri-state Enable/Fault signaling for system-level fault coordination, dv/dt-controlled soft-start ramp (1.8ms typ), and latching thermal behavior versus auto-retry alternatives.

Technical Context

The NIS5132MN1 implements a fully integrated electronic fuse architecture with Kelvin current sensing capability, internal charge pump for gate drive, and independent analog monitoring blocks for UVLO (7.7–9.3V), overvoltage clamp (14–16.2V), and thermal shutdown (150–200°C trip). Its dv/dt pin controls output voltage slew rate via external capacitor timing, while the ILIMIT pin sets current thresholds using an external resistor.

It features a tri-state Enable/Fault pin that serves dual roles: logic-controlled enable/disable (0.58V low / 2.64V high) and open-drain fault reporting (1.4V mid-level during thermal shutdown), enabling up to three devices to be daisy-chained for coordinated shutdown. The exposed pad provides thermal conduction and must be connected to PCB ground plane.

Key Specifications

Pinout & Package

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

Key Features

Applications

Availability

NIS5132MN1-FN-7 is available at Aetrix Electronics and suitable for hard disk drive power rails, industrial motherboard 12V distribution, and printer engine power management requiring stable component supply and long-term lifecycle support.

Supply support for NIS5132MN1-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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial and computing markets.

The NIS5132 belongs to Diodes' electronic fuse product line, engineered specifically for high-current, high-voltage DC power rail protection in storage, computing, and factory automation systems where latching fault behavior and compact packaging are critical.

FAQ

What is the difference between NIS5132MN1-FN-7 and NIS5132MN2-FN-7?

The NIS5132MN1-FN-7 uses latching thermal shutdown: once tripped at +175°C, it remains off until the Enable/Fault pin is toggled low-then-high or input power is cycled. In contrast, NIS5132MN2-FN-7 implements auto-retry thermal shutdown with +45°C hysteresis, automatically restoring output after die cooling. Both share identical overvoltage clamp, R_DS(ON), and current limit specifications.

Can the NIS5132MN1-FN-7 be used with 5V input?

No - the NIS5132MN1-FN-7 has a minimum operating voltage of 7.6V and a guaranteed functional range of 9.0–18.0V. At 5V, the internal charge pump cannot generate sufficient gate drive voltage for the NMOS power device, resulting in incomplete turn-on, excessive R_DS(ON), and thermal runaway. It is not rated or characterized for 5V operation.

How is current limit set, and what resistor value yields 3.44A?

Current limit is set by connecting a resistor between Source pins and the ILIMIT pin. For a 3.44A short-circuit threshold, a 15.4Ω resistor is required (per DS36457 Rev. 5–3, Figure 13). This value is validated across temperature and accounts for internal reference accuracy; deviation beyond ±1% alters trip point by >±5%.

Is the U-DFN3030-10 package lead-free and RoHS compliant?

Yes - the NIS5132MN1-FN-7 uses a lead-free finish and complies with EU Directive 2011/65/EU (RoHS 2), including all applicable exemptions. It is also halogen- and antimony-free ("Green" per Diodes' definition: <900ppm Br, <900ppm Cl, <1000ppm Sb), with UL Recognition Report E322375-20140529.