Monolithic Power Systems Inc. MP5022CGQV-Z

Overview

MP5022CGQV-Z from Monolithic Power Systems is a hot-swap protection IC with integrated 3mΩ R_DS(ON) MOSFET, 15A continuous current limit, ±3% current monitor accuracy (6–15A), and fast 200ns short-circuit response. It operates from 4.5V to 16V input, provides programmable soft-start via external capacitor, and delivers real-time output current monitoring via IMON pin - used in server backplane power insertion and PC card hot-plug systems.

For engineers reviewing the MP5022CGQV-Z datasheet, MP5022CGQV-Z pinout, MP5022CGQV-Z application, or MP5022CGQV-Z equivalent, key selection criteria include adjustable current limit (via ISET resistor), dual enable control (EN/LOADEN), fault timing configuration (TIMER/ENTM), and integrated OVP/UVP/thermal shutdown with open-drain FLTB and PG outputs.

Technical Context

The MP5022CGQV-Z implements a sense-FET-based current-limit architecture with two-tier protection: primary 11.3–13.9A adjustable limit (set by R_SET) and secondary 36A fast-turnoff short-circuit threshold activated within 200ns. Its internal charge pump enables full enhancement of the low-R_DS(ON) power FET without external gate drive circuitry.

It integrates independent timing circuits: a 43µA current source for insertion delay (TIMER), an 8µA source for gate ramp-up, and a 0.8–1.4µA current into ENTM for LOADEN blanking. PG asserts high only when V_OUT > 90% × V_IN, V_GS > 3V, and V_OUT > V_IN − 0.8V - ensuring safe system power sequencing.

Key Specifications

Pinout & Package

MP5022CGQV-Z is housed in a thermally enhanced QFN-22 package (3mm × 5mm, 0.5mm pitch) with exposed thermal pad (pins 21, 22, and exposed pad) connected to VIN for optimal heat dissipation in high-current applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS23861PWR and LTC4215CMS, MP5022CGQV-Z uniquely combines analog IMON output, 3mΩ R_DS(ON), and dual-stage current limiting - making it optimal for high-density, analog-monitored hot-swap systems requiring minimal external components and deterministic fault timing.

Availability

MP5022CGQV-Z is available at Aetrix Electronics and suitable for server backplane protection, hot-swappable PC card power, and network switch line card protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP5022CGQV-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP5022C product line targets high-reliability hot-swap and inrush current limiting in datacenter, telecom, and industrial equipment - emphasizing low R_DS(ON), fast fault response, and integrated monitoring to replace discrete protection solutions.

FAQ

What is the minimum soft-start time for MP5022CGQV-Z, and how is it achieved?

The minimum soft-start time is 1ms, achieved by leaving the SS pin unconnected (floating). An internal 8µA current source then charges the gate directly, bypassing external capacitor control. This mode is useful for applications requiring rapid power-up after fault recovery or when load capacitance is small enough to avoid inrush overshoot.

How does the MP5022CGQV-Z detect a failed MOSFET before startup?

During power-up, the device monitors V_OUT relative to V_IN. If V_OUT exceeds V_IN − 0.8V before the FET is fully enhanced, it detects a shorted or damaged pass MOSFET. FLTB is immediately pulled low, and the FET remains disabled - preventing destructive current flow during insertion of a faulty board.

Can the IMON output drive an ADC directly, and what external components are required?

Yes - IMON is a precision current source (10µA/A, ±3%). To convert to voltage, connect a 10kΩ resistor from IMON to GND (yielding 0–1.5V for 0–15A). A ≥10nF capacitor must be placed in parallel with the resistor to filter switching noise and ensure stable ADC sampling without aliasing.

What is the role of the AVIN pin, and why is a 49.9Ω resistor required between VIN and AVIN?

AVIN supplies the internal 4V VCC sub-regulator. The 49.9Ω resistor limits inrush current into the AVIN bypass capacitor (2.2µF) during VIN collapse events - such as a strong short from VOUT to GND - ensuring the sub-regulator remains powered and functional to sustain control logic operation during fault conditions.

How is the LOADEN blanking time configured, and what happens if LOADEN is asserted low during blanking?

Blanking time is set by a capacitor on ENTM: t_LDNB = 1.24 × C_ENTM (e.g., 1µF = 1.24s). During blanking, LOADEN transitions are ignored - the FET stays on if EN=1, even if LOADEN goes low. This prevents false shutdowns caused by mechanical contact bounce during hot-plug insertion.

Does MP5022CGQV-Z support reverse current blocking, and how is it implemented?

No - MP5022CGQV-Z does not provide reverse current blocking. Its internal FET is unidirectional (source tied to VOUT, drain to VIN), allowing only forward conduction. For reverse current protection, an external Schottky diode must be placed from VOUT to GND (as recommended in the datasheet) to absorb negative voltage spikes, but this does not block reverse current flow from VOUT to VIN.