Monolithic Power Systems Inc. MP6526GY-P

Overview

MP6526GY-P from Monolithic Power Systems is a six-channel half-bridge motor driver IC with integrated DMOS power MOSFETs, serial SPI-compatible interface (up to 3 MHz), 0.9A per channel output current, R_DS(ON) (HS+LS) ≤ 2Ω at 150°C, and full fault diagnostics including short-circuit, open-load, over-temperature pre-warning, and under-voltage detection. It drives brushed DC motors, solenoids, and valves in automotive seat/mirror control and industrial actuation systems.

For engineers reviewing the MP6526GY-P datasheet, MP6526GY-P pinout, MP6526GY-P application, or MP6526GY-P equivalent, this page delivers verified electrical parameters, validated SOIC-28 package mapping, confirmed serial interface timing constraints, and real-world diagnostic behavior for embedded motor control design validation.

Technical Context

The MP6526GY-P implements six independent high-side/low-side gate drivers controlled via a 16-bit serial input register, with output status reported through a mirrored 16-bit serial output register. Its internal charge pump enables high-side NMOS drive without external bootstrap components.

It integrates dual thermal protection: programmable pre-warning at 120–170°C and hard shutdown at 150–200°C, both with 15°C hysteresis. Fault reporting occurs via open-drain FAULT pin and bit-level flags (TP, SCD, PSF) readable mid-transfer using CS edge-triggered DO mode.

Key Specifications

Pinout & Package

MP6526GY-P is supplied in SOIC-28 package (body size 17.9mm × 7.5mm, 1.27mm pitch), with exposed thermal pad connected to PGND internally. Pin 1 is marked by notch or dot; pin numbering follows standard SOIC convention.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex half-bridge motor driver applications.

Compared with TB9051FTG and VNQ7E100AJTR, MP6526GY-P uniquely combines ultra-low standby current, integrated discharge protection, and open-load detection in a single SOIC-28 package-making it optimal for cost-sensitive, thermally constrained, always-on automotive and industrial actuators where external component count must be minimized.

Availability

MP6526GY-P is available at Aetrix Electronics and suitable for automotive seat control, industrial valve sequencing, robotic joint actuation, and mirror folding systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP6526GY-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 power management ICs, with design centers in the US, China, and Taiwan, and global distribution.

The MP6526 belongs to MPS's automotive-grade motor driver product line, engineered specifically for reliable, low-component-count control of brushed DC loads in harsh environments with extended temperature and voltage ranges.

FAQ

What is the maximum allowable supply voltage for MP6526GY-P?

The absolute maximum VS voltage is 40V, but the recommended operating range is 7V to 28V. Operation above 28V risks exceeding safe power dissipation limits even with heatsinking, and may trigger the internal discharge circuit continuously. For 24V nominal systems, transient spikes up to 35V are tolerated briefly due to built-in clamping.

How does open-load detection work on MP6526GY-P?

When the OLD bit (bit 13) is set low, the IC injects a 1.4–2.4mA test current into each low-side output. If no load is connected, the resulting voltage shift causes the corresponding LSx or HSx status bit in the output register to read high. This occurs without external components and works only when the output is disabled - enabling safe, real-time cable disconnect verification.

Can MP6526GY-P drive an H-bridge configuration with a single motor?

Yes - two half-bridges (e.g., OUT1/OUT2) can be paired to form a full H-bridge for bidirectional DC motor control. The IC does not enforce pairing; firmware assigns HS1/LS1 to one side and HS2/LS2 to the opposite side. Dead time is fixed at 2μs, eliminating need for external timing logic.

Is daisy-chaining supported, and what are the timing implications?

Yes, daisy-chaining is supported via DO-to-DI connection between devices. Each added device adds one CLK cycle latency to status readback. At 3MHz clock, maximum chain length is limited by total propagation delay - tested up to 5 devices with no timing violation when using 100pF load and proper PCB layout.

What happens to the serial interface when EN pin is pulled low?

When EN is low, all six output stages disable immediately, but the VCC-powered serial interface remains fully operational: DI, CLK, and CS continue accepting commands, and DO continues reporting status (including FAULT state). This allows diagnostics and configuration updates during standby - a key feature for automotive "always-listening" modules.

Does MP6526GY-P require external bootstrap capacitors for high-side drive?

No - the MP6526GY-P integrates a charge pump circuit that generates the gate drive voltage for high-side NMOS FETs. This eliminates external bootstrap diodes and capacitors, simplifying layout and improving reliability in vibration-prone automotive applications.

How is thermal pre-warning different from thermal shutdown?

Thermal pre-warning (TP bit) asserts at 120–170°C - 15–30°C below shutdown - allowing firmware to reduce PWM duty cycle or pause operation before catastrophic shutdown. Thermal shutdown (all outputs off, all status bits high) occurs at 150–200°C and requires both temperature drop *and* SRR bit write to resume, ensuring safe cooldown.