Monolithic Power Systems Inc. MP5017GD-P

Overview

MP5017GD-P from Monolithic Power Systems is a programmable current-limit switch with integrated 45mΩ R_DS(ON) N-channel MOSFET pair, reverse-current blocking, fast 5.8V output over-voltage clamp (10µs response), and adjustable 1A–5A current limit via external resistor. It operates from 3V–5.5V input, withstands 16V transients, and protects hot-swap interfaces in USB power distribution and SSD/HDD modules.

For engineers reviewing the MP5017GD-P datasheet, MP5017GD-P pinout, MP5017GD-P application, or MP5017GD-P equivalent, key selection criteria include its dual-direction fault protection (OCP/OVP/OTP), programmable soft-start via DV/DT capacitor, SAS/OV-configurable input OVP, and QFN-12 (2mm×3mm) thermal performance with θ_JA = 70°C/W.

Technical Context

The MP5017GD-P implements bidirectional protection using back-to-back N-MOSFETs to block reverse current down to –50mA (80µs deglitch) and shut off instantly at –1A. Its control loop combines UVLO (2.7V threshold, 250mV hysteresis), fast OVP comparator (5.8V clamp), and current-sense amplifier with 10µs response for primary current limiting.

Soft-start is set by an external capacitor on DV/DT (e.g., 47nF → ~7.2ms ramp), while ILIMIT sets current limit via resistor (499Ω → 2.4A typical). Fault reporting uses open-drain output with differentiated deglitch: 5ms for OCP, 10µs for OVP, and no deglitch for OTP - all internally managed without external components.

Key Specifications

Pinout & Package

MP5017GD-P is housed in a thermally enhanced QFN-12 package (2mm × 3mm, 0.5mm pitch) with exposed thermal pad (Pin 12) for PCB heat sinking. The 12-pin layout supports high-current paths (VCC/VOUT) on wide internal copper planes and integrates GND return through both edge pins and the exposed pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCKE801G and TPS25940A, MP5017GD-P delivers superior hot-swap readiness via its 10µs OVP, reverse-current blocking, and 2mm×3mm QFN footprint - making it optimal for compact, high-reliability storage and interface modules where transient immunity and board area are prioritized over input voltage range or telemetry.

Availability

MP5017GD-P is available at Aetrix Electronics and suitable for HDD/SSD power protection, USB-C power distribution, and hot-swap data card applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for MP5017GD-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP5017GD-P belongs to MPS's eFuse and load-switch product line, engineered specifically for high-density computing and storage systems demanding ultra-fast fault response, minimal footprint, and integrated bidirectional protection without external discretes.

FAQ

What is the maximum transient voltage the MP5017GD-P can withstand on VCC?

The MP5017GD-P supports up to 16V absolute maximum input voltage on VCC, enabling reliable operation during hot-swap events and ESD-induced transients without external clamping diodes. This rating is validated per ABSOLUTE MAXIMUM RATINGS table and applies regardless of duration, though continuous operation remains limited to 3V–5.5V.

How does the MP5017GD-P implement reverse current blocking?

It uses two back-to-back N-channel MOSFETs in series between VCC and VOUT. When reverse current exceeds –50mA for >80µs, the gate drive is removed; at –1A, shutdown is immediate. Blocking remains active until VCC rises >2mV above VOUT, preventing backfeed during card removal or power-down sequences.

Can the output over-voltage clamp be adjusted above 5.8V?

No - the 5.8V output OVP threshold is internally fixed and unadjustable. It is trimmed during wafer test and specified as 5.5V–6.1V over temperature. For higher OVP thresholds, a different device such as the MP5023 (6.8V clamp) must be selected.

What is the minimum recommended capacitor value for DV/DT to achieve stable soft-start?

A minimum of 1nF is required on DV/DT to ensure controlled turn-on; typical designs use 47nF for ~7.2ms ramp. Smaller values increase dV/dt and risk false OCP triggering; larger values extend startup beyond system timing budgets - always verify with actual load capacitance and inrush profile.

Does the Fault pin require an external pull-up resistor?

No - the Fault pin is open-drain and functions correctly with only the internal 100kΩ pull-up used on evaluation boards. In most systems, connecting Fault directly to a microcontroller GPIO with internal pull-up (e.g., 10kΩ) suffices; adding an external pull-up is optional and unnecessary for basic fault detection.

How is thermal shutdown recovery managed after OTP activation?

Upon reaching 175°C junction temperature, MP5017GD-P shuts down completely and pulls Fault low. Recovery begins only after die temperature falls below 125°C (50°C hysteresis), followed by a fixed 76ms internal delay before re-enabling the power FET - ensuring full thermal cooldown before retry.

Is the exposed thermal pad electrically isolated from other pins?

Yes - the exposed pad (Pin 12) is internally connected solely to GND and is electrically isolated from all other pins. It must be soldered to a dedicated GND plane on the PCB; connecting it to any other net will cause functional failure and potential damage.