Monolithic Power Systems Inc. MP5035GJ-P

Overview

MP5035GJ-P from Monolithic Power Systems is a configurable current-limit load switch IC designed for input-to-output fault isolation in 2.9V–22V power rails. It integrates an 82mΩ MOSFET, supports adjustable current limiting (50mA–2A) via external resistor, provides soft-start control through DV/DT pin, and delivers fast short-circuit protection (<1µs response). Used in USB Power Delivery and IP camera power distribution to prevent inrush damage and bus voltage collapse.

For engineers reviewing the MP5035GJ-P datasheet, MP5035GJ-P pinout, MP5035GJ-P application, or MP5035GJ-P equivalent, key selection criteria include programmable current limit accuracy, TSOT23-6 thermal performance under 2A load, hiccup-mode OCP behavior during sustained overloads, and EN logic compatibility with 1.86V–2.16V rising threshold.

Technical Context

The MP5035GJ-P implements a high-side current-limit switch architecture with integrated gate driver, current-sense amplifier, and thermal shutdown circuitry. Its control loop regulates MOSFET gate voltage to maintain constant output current when ILIMIT threshold is exceeded, with typical 15µs regulation response and secondary 8A fast-turn-off protection triggered within 1µs.

Soft-start is implemented via external capacitor on DV/DT pin, setting dV/dt slew rate (1.3–2.7 V/ms), while enable functionality uses internal 2.2MΩ pull-down and 5.5V Zener clamp. UVLO operates at 2.7V ±150mV with hysteresis, and thermal shutdown activates at 175°C with 50°C hysteresis and automatic retry after 700ms cooldown.

Key Specifications

Pinout & Package

MP5035GJ-P is housed in a thermally enhanced TSOT23-6 package with exposed thermal pad. The 6-pin layout supports compact PCB placement and efficient heat transfer to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS25942A and NIS5130, MP5035GJ-P offers optimal balance of programmability, thermal robustness in TSOT23-6, and analog simplicity-ideal for space-constrained USB PD and IP camera designs requiring precise 50mA–2A current limiting without digital overhead.

Availability

MP5035GJ-P is available at Aetrix Electronics and suitable for USB Power Delivery, IP camera power distribution, hot-swap backplane, and power meter front-end applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for MP5035GJ-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 design focus on efficiency, integration, and thermal reliability.

The MP5035 belongs to MPS's eFuse and load switch product line, engineered specifically for robust hot-swap, USB PD, and industrial power rail protection where programmable current limiting and fast fault response are critical.

FAQ

What is the minimum current limit achievable with MP5035GJ-P?

The MP5035GJ-P supports a minimum current limit of 50mA, achieved using a 22kΩ resistor between ILIMIT and GND. This value is confirmed in Table 1 of the datasheet and validated across -40°C to +125°C operating range with ±10% tolerance at 25°C.

How does the DV/DT pin affect startup time?

The DV/DT pin sets output voltage slew rate (1.3–2.7 V/ms). Startup time t_SS equals VIN divided by dV/dt - e.g., at 12V with 2 V/ms default slew, t_SS ≈ 6ms. Adding a 47nF capacitor raises dV/dt to 4.2 V/ms, reducing t_SS to ~2.9ms.

Can MP5035GJ-P operate with 24V input?

No - MP5035GJ-P has an absolute maximum VIN rating of 26V, but its recommended operating range is strictly 2.9V to 22V. Applying 24V exceeds specification and risks permanent damage, especially during transients or thermal stress.

What happens when ILIMIT is shorted to GND?

Shorting ILIMIT to GND disables the primary current limit and activates an internal 8A secondary limit. If exceeded, the device shuts down the MOSFET immediately (<1µs) and enters hiccup mode after 700ms, providing high-energy short-circuit protection.

Is there internal output discharge, and how does it work?

Yes - MP5035GJ-P includes a 540Ω internal discharge path from SOURCE to GND, activated automatically when EN is low or VIN drops below UVLO. It discharges typical 10μF output capacitors in <50ms, eliminating residual voltage hazards during power cycling.

Does MP5035GJ-P require input capacitance, and what is the minimum value?

Yes - a minimum 1μF X7R ceramic capacitor is required between VIN and GND per datasheet Figure 5. For VIN >15V, MPS recommends ≥22μF to suppress input voltage spikes during short-circuit events and ensure SOA compliance.

What is the thermal resistance of MP5035GJ-P in TSOT23-6?

On the EV5035-J-00A evaluation board (2-layer, 50mm×50mm), θ_JA is 66°C/W and θ_JC is 23°C/W. These values assume proper PCB copper pour and thermal via usage; actual performance depends on board layout and airflow.