Monolithic Power Systems Inc. MP5083GG-P

Overview

MP5083GG-P from Monolithic Power Systems is a 5.5V, 2A low-R_DS(ON) load switch with integrated current monitoring, soft-start control, power-good indication, and fast short-circuit protection. It operates across 0.5V–5.5V input voltage, features 50mΩ R_DS(ON) at 5V V_CC, ±3% current monitor accuracy, and <200ns fault response-used in portable computing power rail sequencing and USB-C PD auxiliary power distribution.

For engineers reviewing the MP5083GG-P datasheet, MP5083GG-P pinout, MP5083GG-P application, or MP5083GG-P equivalent, key selection criteria include its adjustable current limit via IMON resistor, push-pull PG output timing (50µs delay), thermal shutdown threshold (150°C), and QFN-12 (2mm×2mm) package compatibility with space-constrained PCB layouts.

Technical Context

The MP5083GG-P integrates a 50mΩ N-channel MOSFET with precision current-sense amplifier, programmable soft-start via external capacitor on SS pin, and dual-stage overcurrent protection: primary regulation at ~1.4A (set by R_IMON) and secondary fast-off trigger at ~7A. Its PG pin asserts high when |V_IN − V_OUT| < 280mV after 50µs, enabling system-level power sequencing validation.

Control logic includes UVLO on V_CC (2.6V–2.8V threshold), EN input with 1.3V–1.7V hysteresis, and internal 11µA constant-current source for SS ramp generation. Output discharge uses a 200Ω internal pull-down to safely collapse V_OUT during disable.

Key Specifications

Pinout & Package

MP5083GG-P is housed in a thermally enhanced 2mm × 2mm QFN-12 package with exposed thermal pad (pins 6, 11, and exposed pad connect to VIN). The package supports high-density routing and efficient heat dissipation in portable applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar load switch with current monitoring applications.

Compared with TPS22975 and NIS5020, MP5083GG-P delivers superior current monitoring fidelity (±3% vs. ±5%/none), lower conduction loss (50mΩ vs. 80/100mΩ), and integrated sequencing features (PG, soft-start, discharge), making it optimal for compact, intelligent power-rail management in portable electronics.

Availability

MP5083GG-P is available at Aetrix Electronics and suitable for notebook power sequencing, USB-C PD auxiliary load switching, and tablet battery management interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP5083GG-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 mixed-signal ICs for power management, motor drive, and automotive applications.

The MP5083 belongs to MPS's load switch and power distribution product line, engineered specifically for space-constrained portable electronics requiring precision current telemetry, fast fault response, and seamless power-rail sequencing.

FAQ

What is the minimum recommended soft-start capacitor value for MP5083GG-P?

The datasheet specifies a minimum soft-start capacitor of 4.7nF on the SS pin. Using smaller values risks uncontrolled V_OUT rise time and potential current-limit activation during startup. A 10nF–100nF ceramic capacitor is typical for 2A loads, balancing inrush suppression and startup speed.

How does the IMON pin function, and what resistor value sets a 2A current limit?

The IMON pin outputs a voltage proportional to load current, with gain set by an external resistor to ground. For a 2A limit, use R_IMON = 15kΩ (per design example in Rev. 1.1 datasheet), yielding ~60.6µA output at 2A. Accuracy remains ±3% across 0.6A–2A with proper layout and decoupling.

Can MP5083GG-P operate with V_IN below 1.2V, and how does that affect current monitoring?

Yes, MP5083GG-P operates down to 0.5V V_IN, but current monitor gain shifts from ~33,000 to ~28,000 below 1.2V, reducing IMON output proportionally. At V_IN = 1V and I_OUT = 2A, IMON reads 53.17–62.42µA versus 58.78–62.42µA at 3.6V-calibration adjustment is required for sub-1.2V operation.

What is the purpose of connecting NC pins (7,8,10) to V_OUT?

Pins 7, 8, and 10 are no-connect but thermally tied to the die. Connecting them to V_OUT improves heat spreading across the PCB copper, lowers junction temperature by up to 8°C, and ensures mechanical and thermal compatibility with pin-compatible variants MP5087 and MP5077 in multi-design platforms.

Does MP5083GG-P require external components for basic operation?

Yes: a pull-up resistor on EN (if driven by open-drain controller), an R_IMON to ground for current limit setting, and an SS capacitor for soft-start. Optional components include an IMON bypass capacitor (<1nF) for noise reduction and input/output bulk capacitors per layout guidelines.

How does the power-good (PG) signal behave during thermal shutdown?

During thermal shutdown, the internal FET turns off and V_OUT collapses. Once |V_IN − V_OUT| exceeds 340mV, the PG pin is actively pulled low within microseconds. PG remains low until thermal recovery, V_OUT re-ramps, and the 50µs timing window completes-providing unambiguous fault signaling to system controllers.