Monolithic Power Systems Inc. MP5016GQH-L-P

Overview

MP5016GQH-L-P from Monolithic Power Systems is a programmable current-limit switch with integrated 43mΩ power MOSFET, reverse-blocking gate driver, and selectable over-voltage clamp (5.75V or 15.2V). It operates across 2.7–22V input, delivers 0.7–5A adjustable current limit via ILIMIT resistor, and provides fast short-circuit response (<1µs) and latch-off thermal shutdown at 175°C. Used in USB3.1 PD and hot-swap circuits to protect downstream loads from inrush, over-voltage, and reverse-current faults.

For engineers reviewing the MP5016GQH-L-P datasheet, MP5016GQH-L-P pinout, MP5016GQH-L-P application, or MP5016GQH-L-P equivalent, key selection criteria include its dual-mode OVP threshold selection (via MODE pin), DV/DT-controlled soft-start slew rate (0.4–4.8 V/ms), adjustable current limit (0.7–5A), reverse-current blocking capability via external N-MOSFET, and QFN-10 (1.5mm×2mm) package thermal performance (θJA = 56°C/W).

Technical Context

The MP5016GQH-L-P integrates a high-side power MOSFET with 43mΩ R_DS(on), enabling precise current limiting without external sense resistors. Its control loop regulates gate voltage to maintain constant output current during overload, with 15µs typical response time before entering 2ms latch-off on sustained overcurrent.

OVP protection uses a dedicated comparator monitoring SOURCE voltage against MODE-configured thresholds (5.75V or 15.2V); clamping occurs within <1µs of over-voltage detection. Reverse-blocking is implemented via GATE pin drive - pulled low during EN disable, UVLO, or thermal shutdown - enabling fast turn-off of an external N-channel MOSFET to prevent backfeed from output to input.

Key Specifications

Pinout & Package

MP5016GQH-L-P is housed in a thermally enhanced QFN-10 package (1.5mm × 2mm, 0.5mm pitch) with exposed thermal pad. The package supports ≤2.23W continuous power dissipation at +25°C ambient and features optimized copper layout for low θ_JA (56°C/W) on standard 2-layer PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCKE805L, MP5016GQH-L-P adds MODE-selectable OVP and reverse-blocking gate drive - essential for multi-rail and hot-swap use. Versus TPS25982L, it trades package size and accuracy for faster OVP response and smaller footprint, making it optimal for compact USB PD and embedded hot-swap modules.

Availability

MP5016GQH-L-P is available at Aetrix Electronics and suitable for USB3.1 Power Delivery, hot-swappable server modules, and HDD/SSD power sequencing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP5016GQH-L-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 power management ICs, with over 20 years of expertise in DC/DC converters, LED drivers, and protection devices.

The MP5016 product line targets robust, space-constrained power protection in computing, storage, and communications infrastructure - emphasizing integration, thermal efficiency, and fast transient response without external components.

FAQ

What is the minimum recommended ILIMIT resistor value for 5A current limit?

The datasheet specifies RLIMIT = 422Ω yields a typical 5A current limit. Using a 422Ω ±1% metal-film resistor ensures stable operation within tolerance. Lower values risk exceeding 5.5A peak during short-circuit events, triggering the 8A secondary shutdown before the 2ms latch timer expires.

Can MP5016GQH-L-P operate reliably with a 24V transient on VCC?

No - the absolute maximum rating is 26V transient, but sustained 24V exceeds the 22V continuous operating limit. At 24V, internal power dissipation rises sharply, risking thermal shutdown even at light loads. For 24V systems, use external clamping or select a higher-voltage-rated eFuse like MP5022.

How does the GATE pin behave when MODE is floated and OVP is disabled?

GATE remains active for reverse-blocking: it sinks current during EN disable, UVLO, or thermal shutdown regardless of MODE state. Floating MODE only disables OVP clamping - reverse-current protection via external MOSFET remains fully functional and unaffected.

Is the 2.5A fixed current limit accurate across temperature?

Yes - the 2.5A limit when ILIMIT is floating is specified as 2.3A to 2.7A over –40°C to +125°C junction range. This ±0.2A variation ensures predictable trip behavior in automotive and industrial environments without calibration.

What happens if DV/DT is left unconnected (open)?

DV/DT floats internally, resulting in a default dV/dt slew rate of 3.8 V/ms when MODE is also floating. This may cause excessive inrush into large output capacitors (>47µF), triggering current-limit latch-off. Always connect a defined capacitor (e.g., 1nF for ~3.8 V/ms) for repeatable soft-start behavior.

Does the MP5016GQH-L-P support I²C or other digital configuration interfaces?

No - it is an analog-programmed device with no digital interface. All functions (current limit, OVP threshold, dV/dt rate) are set via passive components (resistors, capacitors) and logic-level pins (MODE, EN). Configuration is hardware-defined, not firmware-controllable.

Can the output discharge function work when an external reverse-blocking MOSFET is used?

No - the internal 540Ω discharge path is placed between SOURCE and GND, but the external reverse-blocking MOSFET isolates SOURCE from the load during shutdown. Therefore, output discharge is disabled when the external MOSFET is present, requiring separate discharge circuitry if needed.