Monolithic Power Systems Inc. MP5090GC-P

Overview

MP5090GC-P from Monolithic Power Systems is a dual-channel, low-quiescent-current load switch IC with 2A per channel continuous current capability, 30mΩ R_DS(ON) at 5V V_CC, and operation across 0.5V–5.5V input voltage range. It integrates soft-start, output discharge, hiccup-mode current limiting, thermal shutdown, and reverse-block capability - deployed in portable SSDs, tablets, and handheld devices for power rail sequencing and inrush control.

For engineers reviewing the MP5090GC-P datasheet, MP5090GC-P pinout, MP5090GC-P application, or MP5090GC-P equivalent, key selection criteria include its 2A CSP-packaged current rating, 40µA quiescent current, dual independent enable control (EN1/EN2), and verified 8-ball CSP (1.05mm×1.60mm) package compatibility with high-density PCB layouts.

Technical Context

The MP5090GC-P implements two independent N-channel MOSFET load switches with integrated gate drivers, UVLO (1.7V rising threshold), and internal 50Ω output discharge resistors activated during disable. Its control logic requires V_CC ≥1.85V to operate and supports parallel-channel configuration for 4A total load capacity.

Short-circuit protection uses dual-stage response: fast turn-off (~200ns) at ~5A peak, followed by hiccup mode (2ms on / 90ms off) when current limit (2.1–2.5A) sustains thermal rise. Thermal shutdown triggers at 155°C with 30°C hysteresis, ensuring safe recovery under overload.

Key Specifications

Pinout & Package

MP5090GC-P is packaged in an 8-ball CSP (1.05mm × 1.60mm, 0.4mm pitch) with bottom-side I/O layout optimized for minimal PCB area and thermal resistance (θ_JA = 170°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel load switch applications.

Compared with TPS22965DSGR and RT9759GJ6, MP5090GC-P uniquely combines dual independent enable, integrated 50Ω discharge, hiccup-mode protection, and 40µA IQ in a 1.05mm×1.60mm CSP - making it optimal for space-constrained, self-recovering portable power architectures.

Availability

MP5090GC-P is available at Aetrix Electronics and suitable for notebook power sequencing, tablet display bias control, and portable SSD power management requiring stable component supply across extended product lifecycles.

Supply support for MP5090GC-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-efficiency analog and power ICs, with design centers in the US, China, and Taiwan, and manufacturing partners across Asia.

The MP5090 product line targets ultra-low-power, high-density portable electronics - delivering integrated load switching with minimal board area, thermal overhead, and system-level protection complexity.

FAQ

What is the maximum allowable junction temperature for MP5090GC-P, and how does thermal shutdown behave?

The MP5090GC-P triggers thermal shutdown at 155°C junction temperature with 30°C hysteresis, meaning it remains disabled until die temperature falls below 125°C. This threshold is guaranteed across -40°C to +125°C ambient operating range and protects against sustained overload or poor PCB thermal design without requiring external thermal sensors.

Can MP5090GC-P support reverse current blocking, and what external connections are required?

Yes - reverse current blocking is supported by connecting IN1 to the upstream power source and IN2 to the downstream load, then tying EN1 and EN2 together. When both enables are high, the internal MOSFETs conduct forward; when disabled, the body diodes block reverse flow from load to source, eliminating need for discrete back-to-back FETs.

What is the recommended V_CC decoupling capacitor value and type for MP5090GC-P?

A 1µF X5R or X7R ceramic capacitor placed within 2mm of the V_CC and GND pins is recommended. This value ensures stable internal regulator operation during fast enable transitions and suppresses noise coupling into the gate driver circuitry - validated across 1.85V–5.5V V_CC range.

How does the hiccup-mode overcurrent protection differ from latch-off behavior in competing load switches?

Hiccup mode cycles 2ms of current limiting followed by 90ms of shutdown, allowing thermal recovery while maintaining fault awareness. Unlike latch-off devices (e.g., RT9759GJ6), MP5090GC-P automatically attempts re-enabling without host intervention - essential for unattended portable storage or medical sensor applications where manual reset is impractical.

Is MP5090GC-P compatible with 0.5V input rails, and what functional limitations apply at that voltage?

Yes - MP5090GC-P operates down to 0.5V VIN with full enable functionality and current limiting. However, R_DS(ON) increases to ~35mΩ at 0.5V due to reduced gate overdrive, resulting in ~175mW conduction loss at 2A. System designers must verify thermal margin in ultra-low-VIN use cases such as coin-cell backup rails.

Does MP5090GC-P require external components for short-circuit protection, or is it fully self-contained?

MP5090GC-P provides fully self-contained short-circuit protection: fast turn-off (~200ns) at ~5A peak, followed by hiccup-mode regulation. No external current-sense resistors, comparators, or timers are needed - all protection logic, timing, and MOSFET drive are integrated, reducing design risk and layout sensitivity.