Monolithic Power Systems Inc. MP5010BDQ-LF-Z

Overview

MP5010BDQ-LF-Z from Monolithic Power Systems is a programmable current-limit load switch with integrated 40mΩ DMOS FET, 3V–18V input range, adjustable current limit (1A–5A), 5.7V output over-voltage clamp, and thermal latch shutdown at 175°C. It protects hot-swappable PC cards and wireless modems by limiting inrush current via dv/dt-controlled slew rate and blocking faults via tri-state Enable/Fault pin.

For engineers reviewing the MP5010BDQ-LF-Z datasheet, MP5010BDQ-LF-Z pinout, MP5010BDQ-LF-Z application, or MP5010BDQ-LF-Z equivalent, key selection criteria include its Kelvin- vs. direct-current sensing modes, 22Ω-resistor-set trip current (2.18A/4.3A), QFN10 (3mm×3mm) thermal pad layout, and bi-directional EN/FAULT signaling for system-level fault coordination.

Technical Context

The MP5010BDQ-LF-Z integrates a charge-pump–driven power FET with precise current-sense topology supporting both Kelvin and direct sensing configurations. Its internal UVLO (2.8V rising edge) and OVP (5.7V clamp) operate independently of external components, while the dv/dt pin enables controlled turn-on using a single capacitor (e.g., 1nF → 3ms rise time).

Thermal protection uses a latched shutdown at 175°C with mid-level (0.82–1.95V) EN/FAULT signaling, and under-voltage reset clears the fault flag. The device's 40mΩ R_DS(on) at T_J = 25°C drops to 52mΩ at 85°C, enabling <2.3A continuous operation at 80°C ambient with minimal copper area.

Key Specifications

Pinout & Package

MP5010BDQ-LF-Z uses a thermally enhanced QFN10 package (3mm × 3mm) with exposed thermal pad (Pin 11). The package supports high-power dissipation (θ_JA = 50°C/W) and requires PCB vias under the pad for reliable thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCK323A and TPS25942, MP5010BDQ-LF-Z delivers optimal balance of analog simplicity, integrated OVP, and precise dv/dt control - ideal for cost-sensitive, thermally constrained hot-swap applications where digital interfaces add unnecessary complexity.

Availability

MP5010BDQ-LF-Z is available at Aetrix Electronics and suitable for hot-swappable PC cards, wireless modem data cards, laptop ExpressCard slots, and industrial USB hub power management requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.

Supply support for MP5010BDQ-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 core expertise in DC/DC conversion, load switching, and motor control.

The MP5010B product line targets robust, integrated power protection for hot-plug and modular computing applications - emphasizing analog precision, thermal resilience, and minimal external component count.

FAQ

What is the maximum continuous current rating for MP5010BDQ-LF-Z at 85°C ambient?

The MP5010BDQ-LF-Z supports 2.3A continuous current at 80°C ambient with minimum copper area, per datasheet Section "Recommended Operating Conditions." At 85°C, derating applies: thermal calculations show safe operation up to ~2.0A with standard 1-in² pad, assuming θ_JA = 50°C/W and T_J(MAX) = 150°C. For sustained 2.3A, additional copper or airflow is required.

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), which is distinct from LOW (disabled/cleared) and HIGH (enabled). This MID state signals thermal fault without resetting the internal latch; recovery requires pulling the pin LOW or cycling VCC below UVLO (2.65V) to clear the fault flag.

Can MP5010BDQ-LF-Z be used with 24V input?

No. The absolute maximum VCC rating is 22V, and recommended operating range is strictly 3V–18V. Applying 24V exceeds both limits and risks permanent damage. For 24V systems, consider MPS's MP5023 (36V max) or TI's TPS25947 (36V), which offer compatible functionality with extended voltage range.

What is the difference between Kelvin and direct current sensing on the I-Limit pin?

Kelvin sensing uses separate sense paths to eliminate PCB trace resistance error, yielding tighter current accuracy (e.g., 2.18A trip with 22Ω). Direct sensing shares the same path for current flow and measurement, simplifying layout but introducing trace-resistance error - resulting in higher trip current (4.3A with same 22Ω). Choose based on accuracy vs. layout priority.

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

No. The MP5010BDQ-LF-Z includes an internal 25μA pull-up current source, enabling direct connection to microcontroller GPIO without external components. An external pull-up is only needed if driving multiple devices in wired-NOR configuration or if stronger drive capability is required for noise immunity.

Does MP5010BDQ-LF-Z support reverse current blocking?

No. The device contains a single N-channel DMOS FET configured as a high-side switch with source tied to output. It does not integrate body-diode reverse-blocking circuitry or back-to-back FETs. Reverse current flow from output to input is possible if V_OUT > V_IN + V_F, and must be prevented externally if required.

What is the minimum dv/dt capacitor value for stable operation?

The datasheet specifies C_dv/dt ≥ 330pF for functional slew-rate control. Using less than 330pF (e.g., 100pF) results in uncontrolled fast turn-on, exceeding inrush limits and potentially triggering OCP falsely. A 1nF capacitor is recommended for general-purpose 3ms ramp time and robust noise immunity.