Monolithic Power Systems Inc. EV5035-J-00A

Overview

EV5035-J-00A from Monolithic Power Systems is a configurable current-limit load switch IC designed for input/output fault protection in hot-swap and USB power distribution systems. It integrates an 82mΩ MOSFET, supports 2.9V–22V input, delivers up to 2A output current (adjustable via ILIMIT resistor), features soft-start control via DV/DT pin, and provides hiccup-mode over-current protection. Used in IP cameras and USB3.1 PD front-end power rails.

For engineers reviewing the EV5035-J-00A datasheet, EV5035-J-00A pinout, EV5035-J-00A application, or EV5035-J-00A equivalent, key selection criteria include adjustable current limit (50mA–2A), 26V transient input rating, TSOT23-6 thermal performance (θJA = 66°C/W on EV5035-J-00A board), and fast short-circuit response (<1µs).

Technical Context

The EV5035-J-00A implements a high-voltage charge-pump gate driver enabling full enhancement of its internal 82mΩ N-channel MOSFET across 2.9V–22V VIN. Its current-limit loop uses a precision 0.58V sense reference and 1940× current-sense ratio, allowing accurate external resistor programming (e.g., 549Ω → 2A).

Protection logic combines three independent mechanisms: fast-turnoff SCP (triggered at 8A secondary limit), thermal shutdown at 175°C with 50°C hysteresis, and UVLO with 2.7V rising threshold and 200mV hysteresis. The DV/DT pin controls dV/dt slew rate (1.3–2.7 V/ms) via external capacitor, directly setting soft-start time per t_SS = V_IN/dV/dt.

Key Specifications

Pinout & Package

EV5035-J-00A is housed in a thermally enhanced TSOT23-6 package (66°C/W θJA on 2-layer 50mm×50mm PCB), with exposed pad for improved heat dissipation. Pin numbering follows JEDEC MO-193 AB standard: Pin 1 (EN) bottom-left when top marking is read left-to-right.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS25942A and ADM1278, EV5035-J-00A uniquely balances analog configurability (ILIMIT/DV/DT pins), ultra-small TSOT23-6 footprint, and integrated protection - making it optimal for cost-sensitive, space-constrained USB and PoE endpoints where digital telemetry is unnecessary.

Availability

EV5035-J-00A is available at Aetrix Electronics and suitable for hot-swap backplane protection, USB3.1 power delivery front-ends, and IP camera power sequencing requiring stable component supply across production lifecycles.

Supply support for EV5035-J-00A 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 two decades of innovation in integrated DC-DC converters, load switches, and protection devices.

The MP5035 product line targets compact, high-reliability power-path protection for USB, PoE, and industrial hot-swap applications - emphasizing integration, transient robustness, and analog configurability over digital telemetry.

FAQ

What is the maximum allowable input voltage transient for EV5035-J-00A?

The absolute maximum transient input voltage is +26V, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage to the internal MOSFET and charge pump circuitry. For systems with expected transients >22V, a TVS diode rated ≤24V is recommended despite the device's 26V rating, due to energy absorption limits.

How do I calculate the current limit resistor value for a target 1.2A limit?

Use the formula I_LIMIT = 0.58V × 1940 / R_LIMIT. Rearranged: R_LIMIT = (0.58 × 1940) / 1.2 ≈ 937Ω. A standard 1% 931Ω resistor yields 1.207A typical limit. Precision 1% resistors are recommended to maintain ±3% current limit accuracy across temperature.

Does EV5035-J-00A support reverse current blocking?

No. The internal N-channel MOSFET is oriented source-to-load, providing forward current flow only. It does not block reverse current from output to input. For reverse-blocking capability, an external P-channel MOSFET or dedicated ideal diode controller is required upstream.

What is the purpose of the 300kΩ resistor shown between EN and VIN in the typical application circuit?

This resistor pulls EN high to VIN during startup, ensuring reliable enablement while limiting Zener diode current to ~19µA (calculated as (VIN − 5.5V)/300kΩ − 5.5V/2.2MΩ). It avoids excessive quiescent current that would occur with lower resistance values, protecting the internal 5.5V clamp.

Can EV5035-J-00A be used with input voltages below 2.9V?

No. The under-voltage lockout (UVLO) rising threshold is 2.7V ±150mV; operation below 2.55V is not guaranteed. Below 2.9V, the device may fail to start or exhibit unstable regulation. For sub-2.9V applications, consider MPS MPQ5071 (1.8V–5.5V range) or similar low-VIN alternatives.

Is the TSOT23-6 package of EV5035-J-00A RoHS-compliant and lead-free?

Yes. Per the datasheet, all MPS parts including EV5035-J-00A are lead-free, halogen-free, and fully compliant with the EU RoHS directive. The TSOT23-6 package uses matte tin plating and meets J-STD-020 moisture sensitivity level 1 (MSL-1) requirements.

What happens when the ILIMIT pin is shorted to GND?

Shorting ILIMIT to GND disables the primary current limit and activates the secondary 8A current limit. If load current exceeds 8A, the device triggers fast turn-off (<1µs) and enters thermal shutdown or hiccup mode. This mode is intended only for catastrophic fault detection, not normal operation.