Monolithic Power Systems Inc. MP6515GF-P

Overview

MP6515GF-P from Monolithic Power Systems is a phase/enable-controlled H-bridge motor driver IC designed for DC brush motor control in industrial and embedded motion systems. It operates from 5.4V to 35V input, delivers 2.8A peak output current, features integrated 250mΩ high-side and low-side MOSFETs, and provides cycle-by-cycle current regulation without external shunt resistors. Used in precision solenoid actuation and bidirectional motor control with fault reporting.

For engineers reviewing the MP6515GF-P datasheet, MP6515GF-P pinout, MP6515GF-P application, or MP6515GF-P equivalent, key selection criteria include its PHASE/ENBL logic interface, internal current sensing via VISEN/ISET, thermal shutdown at 165°C, and compatibility with 3.3V/5V logic levels in TSSOP-16 EP packaging.

Technical Context

The MP6515GF-P implements a fully integrated N-channel H-bridge with charge-pump gate drive, enabling operation up to 35V while maintaining 250mΩ R_DS(on) per FET at 25°C. Its constant off-time PWM current regulation uses an internal 1.5V trip threshold at VISEN, scaled by ISET resistor value (e.g., 10kΩ → 1V/A), with 16µs blanking time to suppress turn-on current spikes.

Control logic accepts PHASE/ENBL/BRAKE/BMODE inputs to configure forward/reverse/brake modes, including sync fast decay. Fault detection is independent of current regulation - over-current (3.2–5A), over-voltage (36–40V), UVLO (5.3V rise), and thermal shutdown (165°C) all assert open-drain nFAULT without latching unless deglitched for >500ns.

Key Specifications

Pinout & Package

TSSOP-16 EP (5.0mm × 6.4mm) with exposed thermal pad - requires solder connection of EP to PCB ground plane for thermal performance (θ_JA = 45°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6612FNG and VNH7040AS, the MP6515GF-P uniquely balances 2.8A capability, integrated current sensing, and industrial-grade protection in a single TSSOP-16 EP package - ideal for space-constrained, cost-sensitive motion control where analog current monitoring is required without external components.

Availability

MP6515GF-P is available at Aetrix Electronics and suitable for industrial valve actuation, automated door lock mechanisms, and medical infusion pumps requiring stable component supply and long-term production continuity.

Supply support for MP6515GF-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 core expertise in DC/DC conversion, motor control, and LED drivers.

The MP6515 belongs to MPS's industrial H-bridge motor driver product line, engineered for reliable, integrated DC motor control in harsh environments - emphasizing protection robustness, current accuracy, and minimal external component count.

FAQ

What is the function of the ISET pin on the MP6515GF-P?

The ISET pin sets the current limit threshold and VISEN scaling factor via an external resistor to ground. For example, a 10kΩ resistor yields 1V/A on VISEN, so 1.5A load current produces 1.5V - triggering current regulation when VISEN reaches 1.5V. The ISET current is 100µA per ampere of desired trip current, with ±10% tolerance.

Does the MP6515GF-P support 100% duty cycle operation?

Yes - its integrated charge-pump circuit generates boosted gate drive voltage for the high-side N-MOSFETs, enabling continuous conduction without shoot-through risk or duty-cycle limitation. This is confirmed by the functional block diagram showing CPA/CPB/VCP nodes and operational specification across full 0–100% PWM range.

How does the nFAULT pin behave during current regulation versus over-current fault?

nFAULT remains inactive (high-impedance) during normal cycle-by-cycle current regulation, as this is intentional closed-loop operation. It only asserts low during hard faults: over-current events lasting longer than 500ns deglitch time, over-temperature (>165°C), over-voltage (>36V), or UVLO (<5.3V). An external pull-up resistor is mandatory.

Can the MP6515GF-P drive a stepper motor?

Yes - the datasheet explicitly lists "bipolar stepper motors" among supported loads. Its dual-output H-bridge, PHASE/ENBL control, and current regulation allow unipolar or bipolar stepper phase control when paired with external sequencing logic or a dedicated stepper controller.

What thermal considerations apply to the TSSOP-16 EP package?

The exposed pad (EP) must be soldered to a PCB ground plane with ≥4 thermal vias to achieve θ_JA = 45°C/W. Without proper thermal land, junction temperature can exceed 150°C at 1.5A continuous. Derating curves in the datasheet show 1.5A max at +85°C ambient with standard 4-layer board layout.

Is the MP6515GF-P RoHS and halogen-free compliant?

Yes - the datasheet states "All MPS parts are lead-free, halogen free, and adhere to the RoHS directive." The MP6515GF-P carries full RoHS 2011/65/EU compliance and meets JEDEC J-STD-020 moisture sensitivity level MSL3, verified per MPS Quality Assurance documentation.