NXP Semiconductors MPC17533EV

Overview

MPC17533EV from Freescale Semiconductor is a monolithic dual H-bridge motor driver IC designed for portable electronics, enabling precise bidirectional control of bipolar stepper or brushed DC motors. It operates from 2.0 V to 6.8 V, delivers 0.7 A continuous (1.4 A peak) per channel, features 1.2 Ω max R_DS(ON) at 25 °C, and supports PWM up to 200 kHz - used in camera lens actuators and optical disk drive head positioners.

For engineers reviewing the MPC17533EV datasheet, MPC17533EV pinout, MPC17533EV application, or MPC17533EV equivalent, key selection considerations include its dual-channel independent control via parallel MCU interface, built-in shoot-through protection, undervoltage shutdown, and Pb-free 16-pin VMFP package with separate power/ground routing for thermal and EMI robustness.

Technical Context

The MPC17533EV integrates two fully independent H-bridge power stages with dedicated VM1/VM2 motor supply inputs, PGND1/PGND2 high-current grounds, and shared logic supply (VDD) and gate drive voltage (VG) rails. Its internal pre-driver and level shifter enable high-side MOSFET enhancement even when VM exceeds VDD - critical for efficient operation with 5 V motor supplies and 3 V logic.

Control is implemented through four logic inputs (IN1A/IN1B/IN2A/IN2B) plus an active-low OE pin that forces all outputs into high-impedance state regardless of input states. The device implements hardware-level shoot-through prevention and automatic tri-state transition upon VDD falling below 1.5–2.5 V, ensuring fail-safe motor stop during brownout conditions.

Key Specifications

Pinout & Package

The MPC17533EV is housed in a Pb-free 16-pin Very Thin Mini Flat Package (VMFP), optimized for low-profile portable designs with exposed thermal pad for enhanced heat dissipation. Pin layout separates high-current power paths (VM1/VM2, PGND1/PGND2, OUTx) from logic signals (VDD, LGND, INx, OE) to minimize noise coupling and improve EMC performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC17533EV, TB6612FNG offers greater current capacity and integrated PWM but requires more PCB area, while DRV8833 simplifies power design with charge-pump gate drive and better low-voltage efficiency - both lack the MPC17533EV's dual independent VM supply inputs for asymmetric motor rail configurations.

Availability

MPC17533EV is available at Aetrix Electronics and suitable for camera lens actuation, optical disk drive positioning, and portable scanner motor control requiring stable component supply across production lifecycles.

Supply support for MPC17533EV 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

Freescale Semiconductor (now part of NXP Semiconductors) specialized in high-performance analog and mixed-signal ICs for automotive, industrial, and portable electronics markets.

The MPC17533EV belongs to Freescale's SMARTMOS motor driver family, engineered specifically for low-voltage, high-efficiency micromotor control in space- and power-constrained portable devices.

FAQ

What is the maximum motor supply voltage supported by the MPC17533EV?

The MPC17533EV supports a maximum motor supply voltage of 6.8 V under normal operating conditions, with absolute maximum rating of 8.0 V. Exceeding 6.8 V may degrade R_DS(ON) performance and reduce reliability. The MPC17533EV is optimized for 2.0–6.8 V operation, aligning with single-cell Li-ion and regulated 5 V systems commonly used in portable electronics where the MPC17533EV is deployed.

Does the MPC17533EV require an external gate drive voltage, and why?

Yes, the MPC17533EV requires an external gate drive voltage (VG) of 12–13.5 V applied to the VG pin to fully enhance the high-side MOSFETs when the motor supply (VM) exceeds the logic supply (VDD). This is necessary because the internal charge pump cannot generate sufficient gate-source voltage for full enhancement under high VM/VDD ratios (e.g., VM = 5 V, VDD = 3 V). Without proper VG biasing, the MPC17533EV may exhibit elevated R_DS(ON) and risk shoot-through failure.

How does the undervoltage shutdown function work in the MPC17533EV?

The MPC17533EV monitors VDD and triggers automatic shutdown when voltage falls below a 1.5–2.5 V threshold, forcing all H-bridge outputs into high-impedance state within 10 ms. This prevents erratic motor behavior during brownout conditions and ensures safe coasting. Once VDD recovers above the threshold, the MPC17533EV resumes operation based on current input pin states - no reset pulse or reinitialization is required. This behavior is hardwired and independent of OE or INx states.

Can the MPC17533EV drive a bipolar stepper motor, and how is it configured?

Yes, the MPC17533EV can drive a bipolar stepper motor by connecting one winding across OUT1A/OUT1B and the other across OUT2A/OUT2B. Each H-bridge controls one phase, enabling full-step, half-step, or microstepping via coordinated IN1A/IN1B/IN2A/IN2B sequences per the truth table. The MPC17533EV's independent channel control, 200 kHz PWM support, and low R_DS(ON) make it suitable for precision stepper applications such as camera lens positioning where the MPC17533EV is commonly implemented.

What thermal considerations apply to the MPC17533EV in a 16-pin VMFP package?

The MPC17533EV in its 16-pin VMFP package has a junction-to-ambient thermal resistance (R_θJA) of 150 °C/W when mounted on a 37 mm × 50 mm × 1.6 mm glass epoxy board. To maintain safe operation at 0.7 A continuous per channel, PCB layout must include wide copper pours on PGND1/PGND2, a solid thermal pad connection to internal ground planes, and ≥100 nF local VM/VDD decoupling. Without adequate copper area, the MPC17533EV may exceed its 150 °C maximum junction temperature even at rated current.