Monolithic Power Systems Inc. MP5000ADQ-LF-P

Overview

MP5000ADQ-LF-P from Monolithic Power Systems is a programmable current-limit load switch with integrated 40mΩ DMOS FET, adjustable 1–5A current limit via external resistor, 0.9ms default output slew rate (dv/dt pin), and comprehensive protection including UVLO (8.5V turn-on), overvoltage clamping (15V typ), and thermal latch shutdown at 175°C. It serves as an inrush-controlled power path controller in hot-swap and portable computing power rails.

For engineers reviewing the MP5000ADQ-LF-P datasheet, MP5000ADQ-LF-P pinout, MP5000ADQ-LF-P application, or MP5000ADQ-LF-P equivalent, key selection criteria include its QFN-10 (3×3mm) package with exposed VCC pad, tri-state Enable/Fault pin for fault signaling and enable control, I-Limit resistor-based current programming, and thermal-latched shutdown behavior requiring manual reset.

Technical Context

The MP5000ADQ-LF-P implements a sense-FET current-limit architecture with internal charge-pump gate drive enabling low R_DS(on). Its dv/dt circuit uses an internal 41pF capacitor plus optional external capacitance to set output voltage ramp time from 0.4ms to 23ms.

Protection logic integrates independent UVLO (7.7–9.3V threshold with 0.8V hysteresis), overvoltage clamp (13.8–16.2V), and thermal latch (175°C ±5°C). The Enable/Fault pin operates as a bidirectional 3-level interface: low (disable/clear fault), mid (thermal fault signal), high (enable), with 28μA internal pull-up and no external resistor required.

Key Specifications

Pinout & Package

MP5000ADQ-LF-P uses a QFN-10 (3mm × 3mm) package with exposed VCC pad for thermal dissipation. Pin 1 is GND; pins 6–10 are paralleled SOURCE terminals; pin 11 is the exposed VCC pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable current-limit switch applications.

Compared with TPS25940A and NIS5130MNR2G, MP5000ADQ-LF-P offers unique analog-programmable current limit and dv/dt-controlled soft-start without MCU dependency, making it optimal for deterministic, low-complexity 12V hot-swap protection where latch-off thermal behavior is required.

Availability

MP5000ADQ-LF-P is available at Aetrix Electronics and suitable for hot-swap power distribution, PC card power management, and laptop USB-C power delivery applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP5000ADQ-LF-P 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, motion control, and automotive applications.

The MP5000A product line delivers integrated current-limiting load switches optimized for 12V hot-swap, portable computing, and industrial power rail protection - emphasizing analog configurability, latch-type fault handling, and minimal external component count.

FAQ

What is the maximum continuous current rating for MP5000ADQ-LF-P at 80°C ambient?

At 80°C ambient temperature with minimum copper (0.5 in² pad), MP5000ADQ-LF-P supports 2.3A continuous current. This is derated from its 4.7A trip current due to thermal limits - the device will enter thermal shutdown if power dissipation exceeds (125°C − 80°C)/50°C/W = 0.9W, corresponding to ~4.7A × 0.04Ω = 0.88W conduction loss at full load.

How does the Enable/Fault pin behave during thermal shutdown?

During thermal shutdown, the Enable/Fault pin is driven to a mid-level voltage (0.82–1.95V) to signal fault condition. The internal fault flag is latched, and the output remains disabled until VCC cycles or the pin is pulled low to clear the latch. No external pull-up is needed due to the internal 28μA current source.

Can the dv/dt pin be left unconnected, and what is the resulting rise time?

Yes, the dv/dt pin may be left floating. With no external capacitor, the internal 41pF capacitor yields a typical output voltage rise time of 0.9ms (10% to 90%). This default soft-start prevents inrush current spikes without requiring additional components.

What is the purpose of the N/C pin, and how should it be handled on the PCB?

Pin 5 is designated N/C (No Connect) and has no internal connection. It must remain unconnected on the PCB - neither tied to GND nor routed. Leaving it floating avoids unintended parasitic coupling or ESD paths that could affect dv/dt or Enable/Fault pin integrity.

How is overvoltage protection implemented, and what is the clamping voltage range?

Overvoltage protection activates when VCC exceeds 13.8V, clamping the SOURCE output to 13.8–16.2V (typical 15V). This is achieved via internal voltage-sensing and gate control of the power FET - not a Zener clamp - preserving low R_DS(on) during normal operation while protecting downstream 12V-rated loads.

What resistor value sets a 3.0A hold current on MP5000ADQ-LF-P?

A 33Ω resistor between I-Limit and SOURCE pins yields ~3.0A hold current. Per Table 2 in the datasheet, RLIMIT = 30Ω gives 2.56A hold current and 3.71A trip current; RLIMIT = 22Ω gives 3.60A hold current. Interpolating confirms 33Ω achieves ~3.0A hold current with corresponding ~4.2A trip current.

Is MP5000ADQ-LF-P compatible with lead-free reflow processes?

Yes, MP5000ADQ-LF-P is RoHS-compliant and qualified for standard lead-free reflow profiles (JEDEC J-STD-020). The "LF" suffix denotes lead-free finish, and the QFN-10 package withstands peak temperatures up to 260°C for 30 seconds. Thermal pad soldering requires appropriate stencil design and void minimization per MPS application note AN-105.