Monolithic Power Systems Inc. MP5056GQV-P

Overview

MP5056GQV-P 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 in server backplanes, storage enclosures, and industrial power modules during live insertion.

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

Technical Context

The MP5056GQV-P implements a sense-FET current-limit architecture with dual-stage protection: primary ILIMIT regulation (20μs response) and secondary short-circuit cutoff at 25A (200ns). Its internal charge pump enables full gate drive for the low-R_DS(ON) MOSFET across the 6–28V input range.

It integrates independent fault timers (via TIMER pin), programmable UVLO (4.15–5.5V rising threshold), and dual open-drain status outputs-PG (power good, 0.6V FB threshold) and FLTB (fault bar, 20μs propagation delay)-with configurable pull-up requirements and logic-level compatibility.

Key Specifications

Pinout & Package

MP5056GQV-P is housed in a thermally enhanced QFN-22 (3mm × 5mm) package with exposed VIN pads (pins 21–22) for low-inductance high-current input routing and improved 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 LTC4215IMS-1#PBF, MP5056GQV-P uniquely combines low-loss 7mΩ integration, wide 5–15A adjustability, and precision IMON telemetry in a compact QFN-22 - making it optimal for space-constrained, data-rich 12–28V hot-swap nodes.

Availability

MP5056GQV-P is available at Aetrix Electronics and suitable for server backplanes, industrial PLC power modules, enterprise SSD enclosures, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for MP5056GQV-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-efficiency 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 robust, low-R_DS(ON) power sequencing in datacenter, industrial, and medical equipment where reliability and real-time current visibility are critical.

FAQ

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

The MP5056GQV-P supports up to 15A continuous output current when configured with a 7.5kΩ ISET resistor and operated within its thermal limits (T_J ≤ 125°C). Derating is required above 85°C ambient due to θ_JA = 30°C/W on standard 2-layer PCBs; actual current depends on layout, airflow, and copper area.

How does the IMON pin generate its output voltage?

The IMON pin delivers a voltage proportional to output current: V_IMON = I_OUT × R_IMON × 0.1V/A. With a 10kΩ resistor to ground, it yields 100mV per ampere. A 100nF capacitor between IMON and GND filters switching noise, enabling clean ADC sampling without external op-amps.

Can MP5056GQV-P operate with an input voltage below 6V?

No - the absolute minimum operating VIN is 6V per the Recommended Operating Conditions table. Below this, UVLO prevents startup, and internal VCC regulation fails. The 4.15V UVLO rising threshold ensures stable biasing only above 6V; operation at 5V is not characterized or guaranteed.

What happens to PG and FLTB when VIN = 0V but a pull-up supply is present?

PG remains low (logic 0) when VIN = 0V, even with an active pull-up, because PG activation requires V_FB > 0.6V, V_GS > 3V, and V_OUT > (V_IN − 1V) - all unmet with no input. FLTB stays high (open) unless a prior fault condition persists in latch-off mode; auto-retry devices release FLTB upon recovery.

Is the SS pin required for proper startup?

No - the SS pin is optional. Floating SS sets minimum soft-start time (~1ms) using an internal 4μA current source. External CSS is only needed to slow VOUT ramp rate (e.g., 20ms with 100nF) for large output capacitance (>1000μF) to prevent ILIMIT triggering during inrush.

Does MP5056GQV-P support bidirectional current flow?

No - it is a unidirectional high-side hot-swap controller. The integrated MOSFET conducts only from VIN to VOUT. Reverse current (e.g., from VOUT back to VIN during hold-up) is blocked by the MOSFET body diode and not protected; external reverse-polarity protection is required for such use cases.

How is damaged MOSFET detection implemented?

During startup, the MP5056 monitors VOUT relative to VIN. If VOUT exceeds (VIN − 1V) before gate turn-on completes, it infers a shorted MOSFET and pulls FLTB low while holding VOUT off. Recovery occurs only after VOUT drops below that threshold - confirming MOSFET integrity before enabling.