Monolithic Power Systems Inc. MP5007DQ-LF-P

Overview

MP5007DQ-LF-P from Monolithic Power Systems is a programmable current-limit switch IC with integrated 37mΩ DMOS FET, adjustable 1A–5A current limit via external resistor, 1.1ms default output slew rate control, and dual overvoltage/under-voltage protection. It serves as a hot-swap protection device in 5V power rails for laptops and PC cards.

For engineers reviewing the MP5007DQ-LF-P datasheet, MP5007DQ-LF-P pinout, MP5007DQ-LF-P application, or MP5007DQ-LF-P equivalent, key selection criteria include its programmable trip/hold current thresholds, thermal latch shutdown at 175°C, QFN10 (3×3mm) package with exposed thermal pad, and tri-state Enable/Fault pin behavior under fault conditions.

Technical Context

The MP5007DQ-LF-P integrates a charge-pump–driven power FET to achieve low R_DS(on) (37mΩ typ.) while supporting input voltages from 4V to 6V. Its internal dv/dt circuit enables precise output voltage ramp control without requiring external timing components unless extended rise time is needed.

Current limiting uses a sense-FET topology where ILIM-OL (trip current) and ILIM-SS (hold current) are set by an external resistor between I-Limit and Source pins. Thermal shutdown is latched and requires either UVLO cycling or pulling Enable/Fault low to reset - not automatic recovery.

Key Specifications

Pinout & Package

MP5007DQ-LF-P is housed in a 3×3mm QFN10 package with exposed thermal pad (Pin 11), optimized for PCB thermal dissipation. The package supports 2.5W continuous power dissipation at +25°C ambient (θ_JA = 50°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB544RGER and TPS2559DRCT, MP5007DQ-LF-P uniquely combines programmable 1–5A current limiting, integrated 6.65V overvoltage clamp, and latched thermal shutdown - making it optimal for standalone 5V hot-swap protection where robust fault containment is critical.

Availability

MP5007DQ-LF-P is available at Aetrix Electronics and suitable for hot-swap protection, laptop USB port safeguarding, and PC card power management requiring stable component supply and RoHS-compliant packaging.

Supply support for MP5007DQ-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 power ICs, with design centers in the US, China, and Taiwan.

The MP5007 belongs to MPS's programmable load switch product line, engineered for robust 5V rail protection in space-constrained portable and computing systems where inrush control, fault isolation, and thermal resilience are mandatory.

FAQ

What is the minimum recommended copper area for the exposed thermal pad of MP5007DQ-LF-P?

The exposed pad (Pin 11/VCC) requires ≥25 mm² of 2oz copper connected via ≥4 thermal vias (0.3mm diameter) to inner ground planes. This achieves θ_JA ≈ 50°C/W and sustains 2.3A continuous current at +85°C ambient per datasheet derating curves.

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

During thermal shutdown, the Enable/Fault pin drives to an intermediate voltage level (0.82–2.0V), sets the internal fault flag, and latches the output off. Recovery requires pulling the pin low externally or cycling VCC below UVLO (≤3.2V) to reset the flag - no automatic restart occurs.

Can MP5007DQ-LF-P operate reliably with a 22Ω current-limit resistor?

Yes: with RLIMIT = 22Ω, the device delivers ILIM-OL = 3.3A (trip) and ILIM-SS = 2.1A (hold) at VCC = 5V. This configuration is validated in the datasheet's Table 1 and supports typical 5V/2A loads while maintaining safe thermal margin under short-circuit conditions.

Is an external capacitor required on the dv/dt pin?

No - the dv/dt pin has an internal capacitor enabling 1.1ms default rise time when left floating. An external capacitor is optional and used only to extend rise time (e.g., 1nF yields ~23.5ms), per Table 2 in the datasheet. Leaving it unconnected is standard for most 5V hot-swap applications.

What happens if the N/C pin (Pin 6) is accidentally connected to ground or VCC?

Connecting Pin 6 violates the absolute maximum rating and may cause unpredictable operation or permanent damage. The datasheet explicitly states "DO NOT CONNECT" and requires this pin to remain electrically floating - no trace, solder mask opening, or test point should be placed on it.

Does MP5007DQ-LF-P support parallel operation for higher current capacity?

No - the device lacks current-sharing features such as precision current mirroring or master/slave synchronization. Parallel use risks uneven current distribution due to R_DS(on) mismatch and uncoordinated thermal shutdown, potentially causing premature failure of one unit. Use a single higher-current-rated device instead.