Monolithic Power Systems Inc. MP5092GD-P

Overview

MP5092GD-P from Monolithic Power Systems is a dual-channel programmable current load switch IC designed for high-efficiency power path control in portable electronics. It integrates two independent 7.5A, low-R_DSON (10mΩ @ 5V) FETs, supports 0.5V–5.5V input range, features adjustable soft-start via external capacitor, output discharge function, and thermal shutdown. Used in notebook and tablet power rail sequencing to suppress inrush current and protect downstream circuitry.

For engineers reviewing the MP5092GD-P datasheet, MP5092GD-P pinout, MP5092GD-P application, or MP5092GD-P equivalent, key selection criteria include programmable 7.5A current limiting via ILIM resistor, <200ns short-circuit response, dual-channel enable independence, QFN-18 (2mm×3mm) thermal performance, and output discharge resistance of 200Ω.

Technical Context

The MP5092GD-P implements two fully independent load switch channels, each with dedicated EN, ILIM, SS, VCC, VIN, and VOUT pins-enabling asymmetric configuration and staggered power-up. Its sense-FET current-limit architecture delivers ±6% accuracy at 7.5A (RLIM = 10.5kΩ) and responds within ~20µs to overcurrent events before triggering fast-off protection at ~13A.

Each channel employs an internal 9µA constant-current source charging an external SS capacitor to control slew rate; output voltage rises at 3× the SS pin ramp rate. Thermal shutdown activates at 155°C with 30°C hysteresis, and output discharge engages automatically when EN is deasserted under light-load conditions via a 200Ω internal pulldown.

Key Specifications

Pinout & Package

MP5092GD-P is housed in a thermally enhanced 18-pin QFN package measuring 2mm × 3mm with exposed thermal pad. The package supports high-density layout and efficient heat dissipation in space-constrained mobile applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22992 and NCP45561, MP5092GD-P uniquely integrates dual 7.5A channels, 10mΩ R_DSON, programmable soft-start, and 200Ω output discharge in a single 2mm×3mm package-delivering full USB PD sink and notebook rail-management capability without supplemental components.

Availability

MP5092GD-P is available at Aetrix Electronics and suitable for notebook power sequencing, tablet display backlight control, USB-C PD sink implementation, and portable SSD power management requiring stable component supply and long-term industrial availability.

Supply support for MP5092GD-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 MP5092GD-P belongs to MPS's load switch product line, engineered specifically for space-constrained, high-current portable electronics requiring precision current limiting, ultrafast fault response, and integrated discharge-addressing thermal, size, and reliability challenges in modern mobile platforms.

FAQ

What is the minimum input voltage required for MP5092GD-P to operate?

The MP5092GD-P supports an input voltage range from 0.5V to 5.5V per channel. Operation below 0.5V is not guaranteed, as the internal UVLO circuit disables the device when VIN drops below its 0.5V threshold. This enables compatibility with partially discharged Li-ion cells and low-voltage auxiliary rails.

How is the 7.5A current limit set, and what resistor value is required?

The 7.5A current limit is set using an external resistor from ILIM1 or ILIM2 to GND. Per the formula I_LIM = 82 kΩ / R_LIM, a 10.5 kΩ resistor yields 7.5A (82,000 ÷ 10,500 ≈ 7.5). Resistor tolerance directly impacts accuracy-1% metal-film resistors are recommended for ±1% current limit variation.

Does MP5092GD-P require separate VCC supplies for each channel?

No-VCC1 and VCC2 can be tied together and supplied from a common 3–5.5V bias rail. Each channel's control circuitry operates independently, but sharing VCC reduces component count. If VIN ≥ 3V, VCC may be directly connected to VIN, eliminating the need for a dedicated bias supply.

What happens during a short-circuit event, and how does recovery work?

Upon short-circuit detection (>13A), the MP5092GD-P triggers hardware-fast-off within <200ns, disabling the FET for 80µs. After this blanking period, it attempts auto-recovery by re-enabling the channel. If the fault persists, it cycles between off and retry until cleared-preventing latch-up while maintaining system visibility.

Can MP5092GD-P be used with output capacitances larger than 1000µF?

Yes-but large output capacitance increases inrush current duration. When V_OUT rise exceeds the soft-start window, the current limit engages, extending effective startup time. For >1000µF loads, increase SS capacitor value (e.g., 220nF) and verify thermal margin, as sustained current limiting raises junction temperature.

Is the output discharge function active for both channels simultaneously?

Yes-the discharge path (200Ω internal pulldown) activates independently on each channel when its respective EN pin is driven low. Discharge occurs only when the load is lightly loaded (no significant sink current); heavy loads discharge through their own path, and the internal resistor remains inactive.

What PCB layout practices are critical for thermal performance?

Thermal performance depends on soldering the exposed thermal pad to a minimum 100mm² copper pour with ≥6 thermal vias (0.3mm diameter) to inner ground planes. Place ILIM and SS capacitors within 2mm of their pins, and route high-current VIN/VOUT traces with ≥15mil width to limit IR drop and heating.