Monolithic Power Systems Inc. MP5007DQ-LF-Z

Overview

MP5007DQ-LF-Z from Monolithic Power Systems is a programmable current-limit switch IC designed for hot-swap and load protection in 5V systems. It integrates a 37mΩ DMOS power FET, supports adjustable current limit (1.5A–2.8A hold, 3.3A trip with 22Ω resistor), provides dv/dt-controlled slew rate (1.1ms default), and features thermal latch shutdown at 175°C. Used in PC cards and laptops to prevent inrush damage and short-circuit faults.

For engineers reviewing the MP5007DQ-LF-Z datasheet, MP5007DQ-LF-Z pinout, MP5007DQ-LF-Z application, or MP5007DQ-LF-Z equivalent, key selection criteria include its adjustable current limit via external resistor, tri-state Enable/Fault pin behavior (low/mid/high logic levels), UVLO (3.2–4.0V turn-on), overvoltage clamping (5.95–7.35V), and QFN10 thermal performance (θJA = 50°C/W).

Technical Context

The MP5007DQ-LF-Z implements a sense-FET-based current-limit architecture with internal charge-pump gate drive enabling low R_DS(on) (37mΩ typ). Its dv/dt pin controls output voltage ramp time using either internal 1.1ms timing or an external capacitor for extended soft-start.

Enable/Fault operates as a bidirectional, three-level interface: low disables and clears fault flag; mid signals thermal shutdown; high enables (if fault flag is clear). UVLO (3.6V typ) and overvoltage clamp (6.65V typ) protect against supply rail excursions, while thermal latch (175°C) ensures fail-safe shutdown until reset.

Key Specifications

Pinout & Package

MP5007DQ-LF-Z uses a 3×3mm QFN10 package with exposed thermal pad (pin 11). The package supports high-current routing and efficient heat dissipation via PCB vias under the pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2559DRCT and ADM1278ARUZ, MP5007DQ-LF-Z delivers optimal balance of analog programmability, integrated soft-start, and low-R_DS(on) in a minimal 3×3mm footprint-ideal for cost-sensitive, space-constrained 5V hot-swap where digital interfaces add unnecessary overhead.

Availability

MP5007DQ-LF-Z is available at Aetrix Electronics and suitable for hot-swap card insertion, laptop USB power rail protection, and industrial backplane hot-plug applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for MP5007DQ-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.

The MP5007 belongs to MPS's load switch and protection product line, engineered specifically for robust, low-footprint current limiting in 5V hot-swap and portable electronics applications.

FAQ

What is the minimum R_LIMIT value supported for 5A current limit?

The MP5007DQ-LF-Z does not support 5A continuous current. Its maximum confirmed hold current is 2.8A (with 22Ω R_LIMIT). At 5A, power dissipation exceeds thermal limits even with heatsinking. For 5A applications, use MP5013 or MP5017 series devices rated for higher current and thermal capacity.

Can the dv/dt pin be left unconnected without affecting functionality?

Yes-the dv/dt pin is internally biased and defaults to 1.1ms output rise time when floated. Leaving it unconnected is the standard configuration for basic soft-start. An external capacitor is only required if longer ramp times (e.g., ≥2ms) are needed to meet specific inrush targets.

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

During thermal shutdown, the Enable/Fault pin is actively driven to an intermediate voltage level (0.82–2.0V), distinct from low (disable) or high (enable). This mid-level state persists until the pin is pulled low externally or VCC drops below UVLO threshold, resetting the internal fault latch.

Is the N/C pin electrically isolated or tied internally?

Pin 6 (N/C) is electrically isolated-no internal connection exists. It must remain unconnected and floating per datasheet. Solder mask should fully cover it to prevent accidental shorts; no trace or pad should attach to this pin.

Does MP5007DQ-LF-Z support reverse current blocking?

No-the MP5007DQ-LF-Z is a single-direction load switch with source-to-load current flow only. It lacks reverse-blocking capability; reverse current from output to input will forward-bias the internal FET body diode and pass uncontrolled. External diode or dedicated reverse-blocking IC is required for bidirectional isolation.

What is the recommended PCB layout practice for thermal management?

Use ≥4 thermal vias (0.3mm diameter) under the exposed pad (pin 11), connected to a solid inner-layer ground or power plane. Route SOURCE pins (1–5) to wide copper pours (>200 mils), and place R_LIMIT and C_dv/dt within 2mm of their respective pins to minimize parasitic inductance and ensure stable current sensing.