Monolithic Power Systems Inc. MP6526GY-Z

Overview

MP6526GY-Z 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, 1.1Ω typical R_DS(ON) (HS+LS) at 25°C, and comprehensive diagnostics including open-load, short-circuit, over-temperature pre-warning, and under-voltage detection - deployed in automotive seat/mirror actuators and industrial valve control systems.

For engineers reviewing the MP6526GY-Z datasheet, MP6526GY-Z pinout, MP6526GY-Z application, or MP6526GY-Z equivalent, this page delivers verified package mapping (SOIC-28), confirmed serial protocol timing, validated fault reporting behavior (open-drain FAULT), and real-world diagnostic flag interpretation (TP, SCD, PSF bits) for rapid integration into safety-aware embedded motor control designs.

Technical Context

The MP6526 implements six independent high-side/low-side gate drivers controlled via a 16-bit serial input register, with dedicated status feedback through a 16-bit output register readable on CS falling edge. Its charge-pump-based gate drive enables full enhancement of N-channel MOSFETs without external bootstrap components.

Thermal management uses dual thresholds: 120–170°C pre-warning (TP bit set) and 150–200°C shutdown (all outputs disabled, all output register bits = 1). Over-current protection employs programmable delay (1.5 ms or 12 ms via SCT bit) before disabling affected channels and asserting SCD.

Key Specifications

Pinout & Package

MP6526GY-Z is supplied in SOIC-28 package with exposed thermal pad (pin 28 = PGND). Pin functions are electrically validated per MPS datasheet Rev. 1.0 (2019); no NC pins are connected internally.

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-Z offers unique integration of ultra-low quiescent current (<6μA), on-chip discharge protection, and programmable thermal pre-warning - making it optimal for battery-powered, space-constrained, and diagnostic-rich motor control nodes where BOM reduction and predictive fault handling are prioritized over raw current rating or CAN connectivity.

Availability

MP6526GY-Z is available at Aetrix Electronics and suitable for automotive seat control, industrial valve actuation, medical infusion pumps, and robotics joint drivers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MP6526GY-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 power management ICs, with design centers in the US, China, and Taiwan, and global distribution since 1997.

The MP6526 belongs to MPS's automotive-grade motor driver product line, engineered specifically for distributed, diagnostics-rich, low-power-consumption DC motor control in harsh environments - emphasizing functional safety readiness and minimal external component count.

FAQ

What is the maximum supply voltage the MP6526GY-Z can withstand during load dump?

The MP6526GY-Z features an integrated discharge circuit that activates when VS exceeds ~37V, safely bleeding excess charge from blocking capacitors. Absolute maximum VS rating is 40V per datasheet Rev. 1.0, and the device survives ISO 7637-2 Pulse 5a (load dump up to 60V) only when combined with external clamping - the internal circuit prevents sustained overvoltage beyond 40V but does not replace transient suppressors for full automotive compliance.

How does open-load detection work without external components?

When the OLD bit is set low, the MP6526GY-Z enables an internal ~2mA pull-down current on each low-side output. If no load is connected, the corresponding LSx or HSx status bit in the output register reads high; if the load is present and correctly biased, the bit reads low. This method eliminates external sense resistors and comparator circuits while maintaining ±10% detection accuracy across −40°C to +125°C.

Can the MP6526GY-Z drive an H-bridge configuration using two half-bridges?

Yes - OUT1/OUT2, OUT3/OUT4, and OUT5/OUT6 can be paired to form three independent H-bridges. The datasheet confirms parallel load configuration with independent motor operation. Each H-bridge supports bidirectional control, and dead time (2μs) is internally managed to prevent shoot-through, eliminating need for external timing logic or gate resistors.

Is the FAULT pin compatible with 3.3V microcontrollers?

Yes - FAULT is an open-drain output rated for ≤6V, so a 3.3V MCU can directly interface using a 3.3V pull-up resistor. The pin sinks current when active (low), and its logic threshold is referenced to VCC (5V), but voltage translation is unnecessary because the MCU only monitors logic-low assertion - no level shifter is required for interrupt-driven fault capture.

What happens to serial communication when thermal shutdown occurs?

During thermal shutdown, all outputs disable and all 16 bits of the output register go high, but the serial interface remains fully operational: CS, CLK, DI, and DO retain functionality. The MCU can still read status (e.g., TP, SCD) and write SE=1 to resume operation once junction temperature falls below the hysteresis threshold - enabling graceful recovery without power cycle.

Does the MP6526GY-Z support PWM speed control?

No - the MP6526GY-Z is a digital on/off driver, not a PWM gate driver. It accepts binary HSx/LSx enable commands via serial register writes; speed control must be implemented externally (e.g., by modulating enable duration via MCU timer) or using upstream DC-DC regulation. Its 60μs output switching delay limits effective PWM frequency to ≤10kHz if used in quasi-PWM schemes.

How is daisy-chaining implemented across multiple MP6526GY-Z devices?

Daisy-chaining uses shared CS, CLK, and DI lines, with DO of device N connected to DI of device N+1. Each device shifts out its 16-bit status register on its DO pin after CS falling edge, allowing a single SPI transaction to read back status from all chained devices sequentially - no additional address lines or chip-select decoding logic is needed, reducing MCU pin count and PCB routing complexity.