Monolithic Power Systems Inc. MP6523GR-P

Overview

MP6523GR-P from Monolithic Power Systems is a triple half-bridge motor driver IC with integrated DMOS power MOSFETs, serial SPI-compatible interface (3MHz max), 0.9A continuous output current per channel, R_DS(ON) (HS+LS) ≤2Ω at 150°C, and full fault diagnostics including open-load, short-circuit, over-temperature pre-warning/shutdown, and under-voltage protection - used in automotive seat/mirror actuators and industrial valve control.

For engineers reviewing the MP6523GR-P datasheet, MP6523GR-P pinout, MP6523GR-P application, or MP6523GR-P equivalent, key selection criteria include serial daisy-chain capability, 7V–28V VS operating range, <6μA standby quiescent current, QFN-24 thermal performance (θ_JA = 42°C/W), and diagnostic flag reporting via open-drain FAULT and bidirectional DO pins.

Technical Context

The MP6523GR-P implements three independent half-bridge drivers controlled via a 16-bit SPI register map with configurable enable (hardware EN pin + software SE bit), programmable short-circuit delay (SCT bit), and open-load detection (OLD bit). Each bridge supports high-side/low-side switching with internal charge pump for HS gate drive.

Diagnostic architecture includes real-time status reporting through DO (bit-mapped output register), active-low open-drain FAULT assertion on over-current or thermal shutdown, and dedicated analog ground (AGND) and power ground (PGND) separation to maintain signal integrity during high-current transients.

Key Specifications

Pinout & Package

MP6523GR-P is housed in a thermally enhanced QFN-24 package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad for PCB heat sinking. Pin 1 is marked by a dot or beveled corner per JEDEC MO-220 VGGD.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB9051FTG and DRV8876N, MP6523GR-P uniquely delivers triple half-bridge control with SPI daisy-chain, ultra-low standby current, and comprehensive bit-mapped diagnostics in a compact QFN-24 - making it optimal for space-constrained, multi-actuator embedded systems requiring deterministic fault reporting.

Availability

MP6523GR-P is available at Aetrix Electronics and suitable for automotive seat control, industrial valve positioning, robotics joint modules, and medical infusion pump designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP6523GR-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 MP6523 belongs to MPS's automotive-grade motor driver product line, engineered for robust operation in 12V/24V systems with emphasis on diagnostic completeness, thermal resilience, and interface flexibility for ECU and industrial PLC integration.

FAQ

What is the maximum allowable VS voltage for MP6523GR-P, and what happens above that limit?

The absolute maximum VS voltage is 40V. Exceeding this risks permanent damage to internal DMOS transistors and gate drivers. The device includes an integrated discharge circuit that activates above ~37V to safely bleed charge from input capacitors - preventing accidental overvoltage during reverse-polarity protection scenarios or load-dump transients.

How does open-load detection work, and which pins are involved?

Open-load detection is enabled by setting bit OLD=0 in the input register. It applies a controlled pull-down current to each low-side output (OUT1–OUT3) and monitors voltage levels to identify disconnected loads. Status appears in bits 3–4 (HS1/LS1), 7–8 (HS2/LS2), and 11–12 (HS3/LS3) of the DO output register - no external components required.

Can MP6523GR-P drive an H-bridge configuration for a single motor, or is it limited to three independent half-bridges?

MP6523GR-P provides three independent half-bridges - each with separate high-side and low-side control. To drive a single brushed DC motor in full H-bridge mode, two half-bridges (e.g., OUT1+OUT2) can be combined with external external logic or MCU coordination; the IC itself does not natively support cross-bridge synchronization or shoot-through prevention between channels.

What is the purpose of the AGND pin, and how should it be routed on the PCB?

AGND is the dedicated analog ground reference for internal comparators (UVLO, thermal sensors, open-load detection) and must be kept separate from noisy PGND traces. Route AGND directly to the exposed thermal pad or a quiet ground island, use star grounding near VCC/AGND decoupling capacitors, and avoid sharing vias with PGND to preserve diagnostic accuracy.

Does MP6523GR-P support PWM input, or is speed/torque control only possible via serial register writes?

MP6523GR-P does not accept direct PWM signals on its inputs. Motor speed and torque are controlled by writing duty-cycle-equivalent values to the HSx/LSx bits in the input register via SPI - typically implemented by the host MCU generating timed register updates. Internal dead time (2μs) and gate drive timing are fixed and non-adjustable.

Is the FAULT pin actively driven or open-drain, and what conditions assert it?

The FAULT pin is open-drain and active-low. It is pulled low when any channel experiences over-current (OCP trip), thermal shutdown, or UVLO condition. It remains latched low until the fault clears *and* the SRR bit is written high to reset the internal fault register - ensuring persistent indication until host MCU intervention.

What is the minimum VCC voltage required for reliable SPI communication and register access?

The guaranteed minimum VCC for functional SPI operation is 3.15V, per the Recommended Operating Conditions table. At 3.15V, logic thresholds remain valid (VIH = 0.7×VCC ≈ 2.2V, VIL = 0.3×VCC ≈ 0.95V), and IVCC quiescent current stays within 23–35μA - enabling compatibility with 3.3V microcontrollers without level shifters.