Monolithic Power Systems Inc. MP5090GQHT-P

Overview

MP5090GQHT-P from Monolithic Power Systems is a dual-channel, low-quiescent-current load switch IC with 3A/2A per-channel current capability, integrated 20mΩ R_DS(ON) MOSFETs, and independent enable control (EN1/EN2) for power domain sequencing in portable electronics. It operates across 0.5V–5.5V input voltage range with 1.85V–5.5V V_CC, supports reverse current blocking, and delivers hiccup-mode short-circuit protection and thermal shutdown at 155°C.

For engineers reviewing the MP5090GQHT-P datasheet, MP5090GQHT-P pinout, MP5090GQHT-P application, or MP5090GQHT-P equivalent, key selection criteria include channel-specific current rating (3A CH1 / 2A CH2), ultra-low 40µA quiescent current, <1µA shutdown leakage, soft-start timing (30µs), and TQFN-8 package thermal resistance (θ_JA = 110°C/W).

Technical Context

The MP5090GQHT-P implements two independent NMOS load switches with internal gate drivers, soft-start circuitry limiting inrush dV/dt, and dual-stage overcurrent protection: fast 200ns short-circuit turn-off (≈5A peak) followed by 2ms/90ms hiccup cycling. Each channel features dedicated EN pins with 1.2V logic threshold and 200mV hysteresis, enabling precise power-up sequencing.

V_CC powers the control logic and must be ≥1.85V to exit UVLO; the device supports parallel operation (IN1–IN2 + OUT1–OUT2) to deliver up to 6A total with matched R_DS(ON) and thermal derating. Output discharge (50Ω internal resistor) activates when EN or V_CC is low, ensuring rapid V_OUT decay during disable.

Key Specifications

Pinout & Package

MP5090GQHT-P is housed in a 1.5mm × 2.0mm TQFN-8 package with wettable flank leads for automated optical inspection. The exposed thermal pad (Pin 7 GND) must be soldered to PCB ground plane for optimal thermal performance (θ_JA = 110°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 NCP45561MUTXG, MP5090GQHT-P uniquely combines dual independent enable control, 20mΩ/3A channel asymmetry optimized for mixed-rail systems, and integrated output discharge - delivering lower system-level BOM cost and safer hot-plug behavior in space-constrained portable designs.

Availability

MP5090GQHT-P is available at Aetrix Electronics and suitable for notebook power sequencing, tablet USB-C port protection, solid-state drive isolation, and handheld medical device battery management requiring stable component supply across extended production lifecycles.

Supply support for MP5090GQHT-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 manufacturing partners across Asia.

The MP5090 product line targets ultra-low-power, space-constrained portable electronics requiring precise multi-rail power control, emphasizing minimal quiescent current, fast fault response, and seamless integration into thin-profile PCB layouts.

FAQ

What is the maximum continuous current rating per channel for MP5090GQHT-P?

The MP5090GQHT-P supports 3A continuous current on Channel 1 (IN1→OUT1) and 2A on Channel 2 (IN2→OUT2) under recommended operating conditions (T_A ≤ 85°C, 2-layer PCB, θ_JA = 110°C/W). Derating is required above 85°C ambient; full 3A/2A operation assumes proper thermal pad soldering and ≥4 thermal vias to internal ground planes.

Can MP5090GQHT-P be used in reverse-current blocking configurations?

Yes - MP5090GQHT-P supports reverse-current blocking by connecting IN1 to the power source and IN2 to the load, with both EN1 and EN2 asserted high. In this configuration, the internal MOSFET body diodes prevent backflow from powered loads into disabled upstream rails, eliminating need for external blocking diodes in USB-C and hot-swap applications.

Does MP5090GQHT-P require external capacitors, and what values are recommended?

Yes - MP5090GQHT-P requires three external capacitors: a 1µF X5R/X7R ceramic capacitor on V_CC (Pin 8), and 10µF input + 1µF output ceramic capacitors per channel. Input caps must be 0805 size with low ESR; output caps may be 0603. These values ensure stable UVLO behavior, suppress VIN transients, and maintain soft-start integrity under load.

How does the hiccup-mode protection operate during sustained overcurrent events?

During sustained overcurrent, MP5090GQHT-P enters hiccup mode: it limits current for 2ms, then disables both channels for 90ms to dissipate heat. This cycle repeats until the fault clears. Unlike latch-off protection, hiccup mode preserves system recoverability without manual reset, while limiting average power dissipation to safe levels (<150mW) even during indefinite short-circuits.

Is parallel operation of both channels supported, and what is the resulting current capability?

Yes - MP5090GQHT-P supports parallel operation by externally connecting IN1 to IN2 and OUT1 to OUT2. This configuration delivers up to 6A continuous current (derated per thermal limits), leveraging matched 20mΩ R_DS(ON) and shared thermal path. Parallel use requires identical PCB trace lengths and symmetric layout to ensure current sharing within ±10% imbalance.

What is the function of the output discharge feature, and when is it active?

The output discharge feature uses an internal 50Ω resistor to actively pull V_OUT to GND when either EN1/EN2 is low or V_CC drops below UVLO. It activates within 1µs of disable, discharging light loads to <0.1V in <100µs. This prevents floating outputs during hot-swap or system suspend, eliminating risk of unintended logic state corruption in downstream ICs.