Monolithic Power Systems Inc. MP5090GQHT-Z

Overview

MP5090GQHT-Z from Monolithic Power Systems is a dual-channel, low-quiescent-current load switch IC with independent 3A and 2A current capability per channel, integrated low-R_DS(ON) MOSFETs (20mΩ/30mΩ), soft-start, hiccup current limiting, thermal shutdown, and output discharge-designed for power sequencing in portable computing and SSD applications.

For engineers reviewing the MP5090GQHT-Z datasheet, MP5090GQHT-Z pinout, MP5090GQHT-Z application, or MP5090GQHT-Z equivalent, key selection criteria include dual-channel enable control, 0.5V–5.5V input range, <1µA shutdown current, parallel-channel scalability to 6A, and TQFN-8 package compatibility with space-constrained PCB layouts.

Technical Context

The MP5090GQHT-Z implements two independent NMOS load switches with separate EN1/EN2 inputs, each supporting programmable soft-start via internal slew-rate control (30µs V_OUT rise time) and fast short-circuit response (<200ns turn-off). It operates from a single 1.85V–5.5V V_CC supply while handling 0.5V–5.5V input voltages on both channels.

Thermal protection includes 155°C junction shutdown with 30°C hysteresis, and hiccup-mode current limiting (2ms on / 90ms off) triggered at 3.2A–3.6A (TQFN). Output discharge is enabled when EN or V_CC is low, using a 50Ω internal pull-down resistor to prevent floating outputs during disable.

Key Specifications

Pinout & Package

TQFN-8 (1.5mm × 2.0mm) package with wettable flank leads for automated optical inspection (AOI) and reliable solder-joint formation. Exposed thermal pad improves thermal resistance (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 RT9742AGQW, the MP5090GQHT-Z uniquely delivers dual independent 3A/2A switching, sub-1µA shutdown, integrated output discharge, and 0.5V–5.5V operation in a single TQFN-8 package-enabling compact, thermally robust, and ultra-low-power sequencing where rail independence and hot-plug safety are mandatory.

Availability

MP5090GQHT-Z is available at Aetrix Electronics and suitable for notebook power rail management, tablet subsystem isolation, and solid-state drive power sequencing requiring stable component supply across extended product lifecycles.

Supply support for MP5090GQHT-Z 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 MP5090 belongs to MPS's Load Switch product line, engineered specifically for ultra-low-power, space-constrained portable electronics requiring precise inrush control, thermal resilience, and multi-rail sequencing without external discrete components.

FAQ

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

The MP5090GQHT-Z supports 3A continuous current on Channel 1 (IN1→OUT1) and 2A on Channel 2 (IN2→OUT2), verified under TJ ≤ 125°C with proper PCB thermal design (e.g., 2-layer board with θJA = 110°C/W). Derating applies above 85°C ambient.

Does MP5090GQHT-Z support reverse current blocking in single-channel configuration?

Yes-by connecting IN1 to the source and IN2 to the load (with EN1=EN2=high), the body diodes of both internal MOSFETs block reverse current flow. This configuration is validated in the datasheet Figure 2 and requires no external components.

Can the two channels be paralleled, and what is the resulting current capability?

Yes-IN1 and IN2 can be externally shorted, and OUT1 and OUT2 tied together to create a single 6A load switch. This is explicitly supported in the datasheet (Figure 3) and maintains full protection features including soft-start, hiccup, and thermal shutdown.

What is the purpose of the VCC pin, and what voltage range must it be supplied with?

VCC powers the internal gate drivers and protection circuitry. It must be supplied with 1.85V–5.5V DC-separate from VIN-using a local 1µF ceramic capacitor. Operation is undefined if VCC falls below 1.7V due to UVLO activation.

How does the output discharge function operate, and when is it active?

The 50Ω internal discharge resistor connects OUT1/OUT2 to GND whenever EN1/EN2 is low OR VCC is below UVLO (1.7V). It actively pulls down light loads (<100µA) within microseconds after disable, preventing floating nodes that could cause downstream latch-up or false wakeups.

Is MP5090GQHT-Z RoHS-compliant and halogen-free?

Yes-MP5090GQHT-Z is lead-free, halogen-free, and fully compliant with the EU RoHS Directive 2011/65/EU. MPS confirms green status on its official Quality Assurance portal, with material declarations available upon request.

What is the thermal shutdown threshold and hysteresis behavior?

Thermal shutdown triggers at 155°C junction temperature with 30°C hysteresis-meaning the device remains disabled until TJ drops to ≤125°C. Recovery is automatic and does not require cycling EN or VCC; the hiccup timer continues operating during thermal fault conditions.