Monolithic Power Systems Inc. MP5056GQV-Z

Overview

MP5056GQV-Z from Monolithic Power Systems is a 28V hot-swap protection IC with integrated 7mΩ R_DS(ON) MOSFET, adjustable 5–15A current limiting, ±10% current monitoring accuracy, and fast 200ns short-circuit response. It protects downstream circuitry during live insertion in server backplanes, storage enclosures, and industrial power distribution units.

For engineers reviewing the MP5056GQV-Z datasheet, MP5056GQV-Z pinout, MP5056GQV-Z application, or MP5056GQV-Z equivalent, key selection criteria include configurable auto-retry/latch-off fault behavior, external soft-start control via SS pin, IMON-based real-time current telemetry, and QFN-22 (3mm×5mm) thermal performance with θ_JA = 30°C/W on 2-layer PCB.

Technical Context

The MP5056GQV-Z implements dual-stage overcurrent protection: primary current-limit regulation (20μs response) using an ISET-resistor-controlled sense-FET topology, and secondary short-circuit shutdown (200ns) triggered at 25A. Its internal charge pump enables full enhancement of the low-R_DS(ON) MOSFET across the 6–28V input range.

Thermal management combines die-temperature sensing (167°C shutdown, 28°C hysteresis) with UVLO (4.15–5.5V rising threshold), PG/FLTB open-drain status signaling, and damaged-MOSFET detection via VOUT-to-VIN differential monitoring. The TIMER pin controls insertion delay, fault timeout, and auto-retry restart timing via external capacitor.

Key Specifications

Pinout & Package

MP5056GQV-Z is housed in a thermally enhanced QFN-22 (3mm × 5mm) package with exposed VIN pads (pins 21–22) for low-inductance, high-current input connection and improved heat dissipation (θ_JC = 2°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hot-swap protection applications.

Compared with TPS23521RGET and LTC4215CMS-1#PBF, MP5056GQV-Z uniquely balances analog simplicity (no MCU required), high-voltage capability (28V), precision current monitoring, and thermal robustness-making it optimal for standalone, high-reliability hot-swap nodes where telemetry and margin matter.

Availability

MP5056GQV-Z is available at Aetrix Electronics and suitable for server backplanes, industrial PLCs, enterprise SSD enclosures, and telecom line cards requiring stable component supply across extended product lifecycles.

Supply support for MP5056GQV-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 power management ICs, with design centers in the US, China, and Taiwan and global manufacturing partnerships.

The MP5056 belongs to MPS's hot-swap and eFuse product line, engineered specifically for high-current, high-reliability live-insertion applications in datacenter, industrial automation, and communications infrastructure.

FAQ

What is the maximum continuous output current supported by MP5056GQV-Z?

The MP5056GQV-Z supports up to 15A continuous output current under thermal design conditions: 2-layer PCB with 30°C/W θ_JA, ambient temperature ≤65°C, and proper copper pour on VIN/VOUT pads. At 25°C ambient, derating begins above 12A due to self-heating; full 15A requires active cooling or enhanced thermal layout.

How does the IMON pin deliver accurate current measurement without an external shunt?

The IMON pin outputs a voltage proportional to load current using an internal sense-FET topology that mirrors the main power MOSFET's conduction characteristics. With a 10kΩ resistor to ground, it provides 100mV/A scaling and ±10% accuracy across –40°C to +125°C, eliminating external shunts while maintaining galvanic isolation from the power path.

Can MP5056GQV-Z operate with input voltages below 6V?

No. The MP5056GQV-Z has a guaranteed operating VIN range of 6V to 28V per datasheet specifications. Below 6V, UVLO prevents startup, and internal regulation fails-resulting in undefined behavior, potential gate drive instability, and unreliable current limiting. For sub-6V applications, consider MPS's MP5072 (3–5.5V range).

What is the purpose of the PD pin, and how does it affect system behavior during power loss?

The PD pin enables automatic output discharge when VIN drops below UVLO or EN is deasserted. Connecting PD to VOUT activates an internal 500Ω pull-down, discharging output capacitance within milliseconds. This prevents residual voltage from interfering with hot-swap sequencing or causing latch-up in downstream logic-critical for fail-safe power domain isolation.

How does the AUTO pin configuration impact fault recovery in thermal shutdown events?

When AUTO is floating or pulled ≥2.5V, thermal shutdown triggers auto-retry: the device shuts off until die temperature falls 28°C below 167°C, then restarts automatically. When AUTO is grounded, thermal faults force latch-off-requiring external cycling of EN or VIN to resume operation-ensuring personnel safety in hazardous environments.

Is the MP5056GQV-Z RoHS-compliant and halogen-free?

Yes. MP5056GQV-Z is lead-free, halogen-free, and fully compliant with the EU RoHS Directive 2011/65/EU. All packaging materials meet IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), and the QFN-22 body uses green molding compound certified per IEC 61249-2-21.

What is the minimum recommended soft-start time, and how is it achieved?

The minimum soft-start time is 1ms, achieved by leaving the SS pin floating. In this state, an internal 4μA current source charges the MOSFET gate directly, bypassing external capacitor control. This mode is suitable for low-capacitance loads (<50μF); for larger banks, a CSS capacitor (e.g., 10nF → 20ms) must be added to prevent ILIMIT violation during ramp-up.