Monolithic Power Systems Inc. MP6610GJ-Z

Overview

MP6610GJ-Z from Monolithic Power Systems is a 55V, 3A half-bridge power driver with integrated high-side (100mΩ) and low-side (120mΩ) N-channel MOSFETs, cycle-by-cycle current regulation, open-load detection, and fault reporting via open-drain nFAULT. It operates from 4V to 45V (TSOT23-8), supports 2.5V/3.3V/5V logic inputs, and drives brushed DC motors, solenoids, and relays in industrial actuation systems.

For engineers reviewing the MP6610GJ-Z datasheet, MP6610GJ-Z pinout, MP6610GJ-Z application, or MP6610GJ-Z equivalent, this page delivers verified electrical specs, TSOT23-8 package layout, real-world current-sense scaling (100µA/A), thermal shutdown behavior at 165°C, and functional alternatives for motor/solenoid control designs requiring compact, self-protected half-bridge operation.

Technical Context

The MP6610GJ-Z implements constant-off-time (COT) PWM current regulation using an internal current-sense amplifier that sources 100µA per ampere of load current into an external ISET resistor - enabling precise trip thresholds (e.g., 1.5V = 1.5A with 10kΩ). Its bootstrap charge pump sustains high-side gate drive without auxiliary supply.

Protection logic independently monitors over-current (3A OCP threshold, 1µs deglitch), open-load (90µA detection current), UVLO (4.1V rising threshold), OVP (55V rising), and thermal shutdown (165°C with 15°C hysteresis), all signaled via the nFAULT pin. Input logic follows EN/IN truth table: EN=1 enables bridge; IN=1 drives high, IN=0 forces low.

Key Specifications

Pinout & Package

MP6610GJ-Z uses the thermally enhanced 8-pin TSOT23-8 package (JEDEC MO-193BA), optimized for space-constrained motor/solenoid drivers. Pin spacing limits max operating voltage to 45V unless conformally coated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB67H450FNG and L99H02, MP6610GJ-Z offers the smallest footprint (TSOT23-8), zero-shunt current sensing, and widest input range among similarly packaged half-bridges - making it optimal for cost-sensitive, space-constrained industrial motion control where 3A/45V suffices.

Availability

MP6610GJ-Z is available at Aetrix Electronics and suitable for solenoid drivers, relay interfaces, brushed DC motor controllers, and industrial actuator modules requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MP6610GJ-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 manufacturing partnerships.

The MP6610 belongs to MPS's industrial half-bridge driver product line, engineered for reliable, compact, and self-protected actuation in harsh environments - emphasizing integration, fault resilience, and ease of MCU interfacing.

FAQ

What is the maximum recommended input voltage for MP6610GJ-Z?

The MP6610GJ-Z (TSOT23-8 package) is rated for 4V to 45V input. Exceeding 45V risks reliability degradation due to pin spacing limitations; use conformal coating or encapsulation if operation above 45V is unavoidable. The SOIC-8 variant (MP6610GS-Z) supports up to 55V.

How does the ISET pin function for current regulation?

The ISET pin sources 100µA per ampere of load current. Connecting a resistor (e.g., 10kΩ) from ISET to GND creates a voltage proportional to load current (1V/A). When this voltage reaches the 1.4–1.6V trip threshold, the device initiates cycle-by-cycle current limiting - no external op-amp or ADC required.

Does MP6610GJ-Z support bidirectional current flow in motor applications?

Yes - the integrated high-side and low-side N-MOSFETs allow forward (HS on) and reverse (LS on) drive of brushed DC motors. External flyback diodes are required across the motor terminals to handle inductive kickback during switching transitions.

What fault conditions trigger the nFAULT pin?

nFAULT asserts low for over-current protection (OCP), over-temperature protection (OTP), and open-load detection (OLD). It does not activate during normal cycle-by-cycle current limiting events. The pin is open-drain and requires an external pull-up resistor to a logic-compatible voltage.

Can MP6610GJ-Z drive inductive loads without external components?

No - while the IC integrates power MOSFETs and current sensing, driving inductive loads like motors or solenoids requires external components: a 100nF BST capacitor between BST and OUT, ≥100nF VIN decoupling capacitor, and external flyback diodes across the load to manage back-EMF and prevent voltage overshoot.

Is MP6610GJ-Z RoHS and halogen-free compliant?

Yes - MP6610GJ-Z is lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS maintains green status certification, and full compliance documentation is available on the Monolithic Power Systems website under Quality Assurance.

What is the thermal performance of the TSOT23-8 package at 3A continuous load?

With θ_JA = 100°C/W on a standard 4-layer PCB, dissipating ~0.9W (3A² × 100mΩ HS + 120mΩ LS) raises junction temperature by ~90°C above ambient. At 25°C ambient, T_J ≈ 115°C - within the -40°C to +125°C operating range, with 35°C margin before thermal shutdown at 165°C.