Monolithic Power Systems Inc. MP5010ADQ-LF-Z

Overview

MP5010ADQ-LF-Z from Monolithic Power Systems is a programmable current-limit load switch with integrated 40mΩ DMOS FET, 5.7V over-voltage clamp, adjustable slew rate (via dv/dt pin), and thermal latch shutdown. It operates from 3V to 18V input, supports 1A–5A current limiting via external resistor, and protects hot-swap interfaces in PC cards and wireless modems.

For engineers reviewing the MP5010ADQ-LF-Z datasheet, MP5010ADQ-LF-Z pinout, MP5010ADQ-LF-Z application, or MP5010ADQ-LF-Z equivalent, key selection criteria include its adjustable hold/trip current thresholds (e.g., 2.13A hold / 2.98A trip with 22Ω I-Limit resistor), bi-directional Enable/Fault pin signaling, QFN10 (3mm×3mm) thermal pad package, and integrated UVLO (2.8V) + OVP (5.7V) protection.

Technical Context

The MP5010ADQ-LF-Z implements a sense-FET-based current-limit architecture with Kelvin or direct sensing options, enabling precise overload response without external shunt resistors. Its internal charge pump drives the gate of a low-R_DS(on) power FET, maintaining 40mΩ typical ON resistance across temperature.

It integrates four protection functions in one die: under-voltage lockout (2.8V rising threshold), over-voltage clamping (5.7V typ), thermal shutdown (175°C latch), and programmable current limiting. The tri-state Enable/Fault pin provides fault detection (MID-level signal), enable control, and system-wide fault coordination via wired-NOR topology.

Key Specifications

Pinout & Package

MP5010ADQ-LF-Z uses a thermally enhanced QFN10 (3mm × 3mm) package with exposed thermal pad (pin 11). The package supports high-power dissipation (θ_JA = 50°C/W on 4-layer board) and requires soldered thermal vias for reliable operation above 2A continuous load.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB216IRWBR and TPS25942LARVCR, MP5010ADQ-LF-Z delivers optimal balance of programmability, thermal robustness, and compact QFN10 footprint for cost-sensitive hot-swap applications where analog fault signaling and 5.7V clamping are prioritized over digital telemetry or ultra-low R_DS(on).

Availability

MP5010ADQ-LF-Z is available at Aetrix Electronics and suitable for hot-swappable PC cards, wireless modem data cards, laptop ExpressCard slots, and industrial backplane modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MP5010ADQ-LF-Z 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 power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP5010A product line targets robust, integrated power-switching solutions for hot-plug and load-protection applications in computing, communications, and industrial systems - emphasizing simplicity, reliability, and minimal external component count.

FAQ

What is the maximum continuous current rating for MP5010ADQ-LF-Z at 80°C ambient?

The MP5010ADQ-LF-Z supports 2.3A continuous current at 80°C ambient temperature with minimum 0.5 in² copper pad. This rating assumes proper thermal vias under the exposed pad and adherence to JEDEC MO-229 land pattern guidelines. Derating applies above 80°C ambient due to thermal shutdown threshold at 175°C junction temperature.

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

During thermal shutdown, the Enable/Fault pin is driven to an intermediate voltage level (0.82V–1.95V) to signal fault condition. This MID-level state latches until the pin is externally pulled LOW or the input drops below UVLO (2.65V), resetting the internal fault flag and allowing re-enablement upon next valid HIGH assertion.

Can MP5010ADQ-LF-Z operate with a 3.3V input supply?

Yes - MP5010ADQ-LF-Z operates down to 3V input, meeting its 2.8V UVLO rising threshold. At 3.3V, it delivers full functionality including current limiting, OVP clamping at 5.7V, and thermal protection. However, output voltage will track input (no boost), so downstream circuits must tolerate 3.3V nominal operation.

What is the difference between Kelvin and direct current sensing modes?

Kelvin sensing uses separate sense paths to eliminate PCB trace resistance error, yielding tighter hold current accuracy (e.g., 0.95A with 22Ω resistor). Direct sensing shares source and sense paths, simplifying layout but introducing trace-resistance dependency - resulting in higher trip current (2.98A with same 22Ω resistor) and reduced accuracy under high-current traces.

Is an external pull-up resistor required on the Enable/Fault pin?

No - MP5010ADQ-LF-Z includes an internal 25µA pull-up current source. An external pull-up is unnecessary unless driving multiple devices in wired-NOR configuration where aggregate leakage may require stronger biasing. The pin's 4.95V maximum voltage rating must be respected when interfacing with 5V logic.

Does MP5010ADQ-LF-Z support reverse current blocking?

No - MP5010ADQ-LF-Z is a unidirectional high-side switch with source-connected output. It does not block reverse current flow from load to input. For reverse polarity or backfeed protection, an external Schottky diode or dedicated reverse-blocking IC must be added in series with the SOURCE node.

What is the recommended capacitor value for 10ms output rise time?

A 3.3nF capacitor on the dv/dt pin yields ~9.4ms typical rise time (10%–90%), per Table 4 in the datasheet. For 10ms, use 3.5nF–3.7nF ceramic capacitor (X7R, 10V rating), placed adjacent to pin 9 with short, low-inductance trace to ensure consistent slew control.