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Analog Devices Inc./Maxim Integrated TMC7300-LA
- Part No.:
- TMC7300-LA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
TMC7300-LA.pdf
- Description:
- LOW VOLTAGE DC MOTOR DRIVER IC,
- Quantity:
- Payment:
- Shipping:
Inventory:544
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Product details
Overview
TMC7300-LA from TRINAMIC Motion Control GmbH & Co. KG is a low-voltage dual full-bridge DC motor driver IC supporting 2V–11V operation, delivering up to 1.2A continuous (2.4A peak) per motor with integrated MOSFETs, UART-based torque/velocity control, and <50nA standby current - deployed in battery-powered handheld devices, POS terminals, and medical actuators.
For engineers reviewing the TMC7300-LA datasheet, TMC7300-LA pinout, TMC7300-LA application, or TMC7300-LA equivalent, key selection criteria include verified UART-mode dual-motor control capability, QFN20 3×3 mm package thermal performance at ≥0.8A mean current, integrated charge-pump RDS(on) of 170mΩ (HS/LS), and diagnostic feedback via DIAG pin and register reads.
Technical Context
The TMC7300-LA implements two independent full-bridge power stages with internal charge-pump boosting, enabling stable 170mΩ RDS(on) down to 2V supply. It supports two distinct operational modes: UART-controlled dual-motor drive (with velocity, torque, and stall detection) and discrete 4-half-bridge peripheral mode (A1/A2/B1/B2 polarity control).
Control is executed via an auto-baud UART interface (9600–500k Baud) with CRC-protected datagrams and addressable configuration (AD0/AD1 pins). Diagnostics include overcurrent detection (via BRA/BRB sense nodes), thermal shutdown, and error reporting through DIAG pin and status registers - all configurable without external microcontroller firmware changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 11V DC - supports single/dual Li-Ion or ≥2 AA/NiMH cells; minimum 1.8V absolute limit with sufficient decoupling. |
| Output Current | 1.2A continuous per motor (2.4A peak in parallel mode) - enables compact actuation without external heatsinking below 0.8A mean load on 4-layer PCB. |
| RDS(on) (HS/LS) | 170mΩ typ. at VS = 3.3V - achieved via internal charge pump; reduces conduction loss and thermal rise in battery-constrained designs. |
| Standby Current | <50nA typ. - achieved by disabling VIO/NSTDBY rail and pulling all digital inputs low; extends multi-year battery life in IoT endpoints. |
| Interface | Single-wire UART with auto-baud detection and optional CRC - eliminates need for dedicated SPI/I²C peripherals; supports daisy-chaining up to 4 devices via AD0/AD1 addressing. |
| Protection Features | Overcurrent (via BRA/BRB shunt), thermal shutdown, and short-circuit detection - fault state latched until EN pin is pulsed low; DIAG pin asserts high on error. |
| Package | QFN20, 3×3 mm, 0.4 mm pitch, exposed thermal pad - requires ≥5 vias to internal GND plane for thermal management above 0.8A mean current. |
Pinout & Package
Package: QFN20, 3×3 mm, 0.4 mm pitch, thermally enhanced exposed die pad connected to GND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OA1, OA2, OB1, OB2 | Full-bridge output terminals | Drive DC motors or inductive/resistive loads; OA1/OA2 = Bridge A, OB1/OB2 = Bridge B; support H-bridge commutation or half-bridge peripheral mode. |
| BRA, BRB | Current sense foot points | Connect external shunt resistors (e.g., 0.1Ω) to GND for motor current regulation and overcurrent protection; voltage threshold ~1V triggers shutdown. |
| VIO/NSTDBY | Digital I/O supply & standby enable | Pulling low disables logic, resets registers, and reduces current to <50nA; must be sequenced after EN=low and motor stop to avoid ESD diode leakage. |
| EN | Global driver enable | Active-high; disables all outputs (high-Z) when low; clears error flags and releases fault lockout upon falling edge. |
| PWM_UART | UART data I/O | Single-wire bidirectional interface; supports auto-baud ranging 9600–500k Baud; CRC optional for robust long-cable communication. |
| DIAG | Open-drain diagnostic output | Asserts high on overtemperature, overcurrent, or short-circuit; reset by EN=low pulse; configurable as push-pull via register. |
| 1.8VOUT | Internal LDO output | Provides regulated 1.8V for internal logic; requires 100nF ceramic capacitor to GND near pin; shuts down when VIO/NSTDBY is pulled low. |
| VCP | Charge pump capacitor node | Connect 1–100nF capacitor to VS for boosted gate drive; mandatory in parallel motor mode; improves RDS(on) stability below 3.3V supply. |
Key Features
| Feature | Design Value |
|---|---|
| Dual full-bridge + UART control | Enables precise velocity/torque control of two independent DC motors using only one MCU UART port - no PWM timers or GPIO overhead required. |
| Parallel motor mode | Configurable via GCONF.par_mode register to combine both bridges for single-motor 2.4A peak drive - reduces PCB footprint vs. discrete dual-driver solutions. |
| Integrated charge-pump gate driver | Maintains 170mΩ RDS(on) down to 2V supply - eliminates need for external boost converters in ultra-low-voltage battery systems. |
| Real-time load sensing | Reports motor stall and mechanical obstruction via current-limit flag and DIAG assertion - enables closed-loop positionless homing in printers and medical pumps. |
| Thermal-aware layout guidance | Specifies 4-layer PCB with ≥5 thermal vias under exposed pad for >0.8A continuous operation - prevents thermal runaway in space-constrained handheld enclosures. |
Applications
| Handheld Medical Devices | POS Terminal Actuators |
|---|---|
Use Scenario: Compact insulin pump or portable nebulizer requiring silent, low-power motor control with stall detection. IC Role / Device Role / Timing Role: Dual full-bridge driver executing calibrated syringe advance and valve sequencing via UART commands. Use Value: <50nA standby current extends battery life beyond 12 months; integrated current limiting prevents occlusion damage during tube blockage. | Use Scenario: Receipt printer with auto-cutter and paper feed mechanism powered by dual AA batteries. IC Role / Device Role / Timing Role: UART-configured dual-motor controller managing cutter solenoid timing and paper advance velocity. Use Value: 170mΩ RDS(on) minimizes voltage sag during cutter activation; DIAG pin signals jam condition to host MCU within 10µs. |
| IoT Home Automation | Security Camera Pan/Tilt |
Use Scenario: Smart window blind actuator operating from two AA cells with multi-year battery life requirement. IC Role / Device Role / Timing Role: Low-quiescent dual-bridge driver executing bidirectional motor control and end-stop detection. Use Value: Standby current <50nA enables >3-year operation; UART interface allows OTA firmware updates to motor profiles without hardware change. | Use Scenario: PTZ camera module with dual-axis DC motors for smooth pan/tilt motion under battery backup. IC Role / Device Role / Timing Role: Velocity-regulated dual-motor driver synchronized to video frame rate for jitter-free motion. Use Value: Integrated torque limiting prevents gear stripping during obstacle contact; thermal diagnostics prevent overheating in enclosed housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB67H420FTG | Higher 4.5–44V supply range; 3.0A continuous; no integrated UART - requires external MCU PWM and current sensing. | Designed for 12V+ industrial actuators; lacks low-voltage optimization and standby efficiency. | Select when higher voltage/current is needed and UART control is not required. |
| DRV8876N | 2.7–11V operation; 3.6A peak; SPI interface; integrated current sense amplifier - no UART or charge pump. | Optimized for high-current brushed motors with analog current feedback; larger 4×4 mm QFN package. | Select when analog current monitoring and higher peak current are prioritized over ultra-low standby and UART simplicity. |
Compared with TB67H420FTG and DRV8876N, the TMC7300-LA uniquely combines sub-2V operation, <50nA standby, and UART-based torque/velocity control in a 3×3 mm QFN - making it optimal for space- and battery-limited dual-motor systems where firmware simplicity and longevity are critical.
Availability
TMC7300-LA is available at Aetrix Electronics and suitable for battery-operated medical devices, handheld POS terminals, and IoT home automation systems requiring stable component supply across multi-year production cycles.
Supply support for TMC7300-LA 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
TRINAMIC Motion Control GmbH & Co. KG is a German semiconductor company specializing in high-precision motion control ICs, known for field-oriented control, stealthChop, and integrated driver solutions.
The TMC7300-LA belongs to TRINAMIC's low-voltage motor driver family, engineered specifically for battery-constrained applications demanding ultra-low standby current, UART simplicity, and robust protection in miniature packages.
FAQ
What is the minimum supply voltage for reliable operation of the TMC7300-LA?
The TMC7300-LA operates reliably down to 2.0V typical, with an absolute minimum of 1.8V. Below 1.8V, functionality is not guaranteed due to internal regulator and charge-pump limitations. Sufficient bulk capacitance (>10µF) and low-ESR decoupling near VS and 1.8VOUT pins are required to maintain voltage during motor transients. The TMC7300-LA datasheet specifies this range in Section 13.1 "Operational Range" and confirms stable RDS(on) performance down to 2V via internal charge-pump boosting.
How does the TMC7300-LA achieve 170mΩ RDS(on) at low supply voltages?
The TMC7300-LA integrates an internal charge pump that generates boosted gate-drive voltage for its power MOSFETs, maintaining low RDS(on) even when VS drops to 2V. This eliminates the need for external boost circuitry. A 1–100nF capacitor between VCP and VS is required for proper operation; the charge pump is active in both UART and half-bridge modes. The TMC7300-LA's RDS(on) vs. VS curve (Figure 3.4) confirms 170mΩ typ. at 3.3V and <250mΩ at 2V.
Can the TMC7300-LA drive a single motor at 2.4A continuously?
No - the TMC7300-LA supports 2.4A peak current in parallel mode, but continuous rating remains 1.2A per bridge. In parallel configuration, both full-bridges drive one motor, doubling peak capability while sharing thermal load. However, sustained 2.4A would exceed safe junction temperature without aggressive thermal design (e.g., 6+ layer PCB, forced air). The TMC7300-LA datasheet explicitly states "1.2A continuous per motor" and "2.4A peak in parallel mode" in the Order Codes and Principles of Operation sections.
What happens to TMC7300-LA registers during standby mode?
When VIO/NSTDBY is pulled low to enter standby, all internal registers reset to their power-up default values. Upon reapplying VIO/NSTDBY and releasing EN, the TMC7300-LA powers up in initialization state and requires full UART reconfiguration (e.g., GCONF, IHOLD_IRUN) before motor enable. This behavior ensures deterministic startup and avoids unintended motion. The TMC7300-LA datasheet confirms register reset in Section 3.4 "Low Power Standby" and Figure 3.5 timing diagram.
Is the TMC7300-LA pin-compatible with other TRINAMIC drivers like the TMC7300-LA-T?
Yes - the TMC7300-LA and TMC7300-LA-T share identical QFN20 3×3 mm package, pinout, and electrical specifications; only packaging differs (tray vs. tape-and-reel). Both support identical UART, half-bridge, and parallel modes. No PCB redesign is needed when migrating between them. The TMC7300-LA datasheet lists both order codes under "ORDER CODES" with matching size [mm²] and functional descriptions, confirming mechanical and electrical equivalence.
TMC7300-LA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver
- Output Configuration:
- Half Bridge (4)
- Interface:
- UART
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 2.4A
- Voltage - Supply:
- 2V ~ 11V
- Voltage - Load:
- 2V ~ 5.25V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
TMC7300-LA FAQ
1.How can I place an order for TMC7300-LA through Aetrix?
Please submit a Request for Quotation (RFQ) for TMC7300-LA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMC7300-LA reliable?
The price and inventory of TMC7300-LA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMC7300-LA is usually 5 days.
3.What payment methods are accepted for TMC7300-LA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMC7300-LA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMC7300-LA?
TMC7300-LA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMC7300-LA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMC7300-LA?
For technical support, including TMC7300-LA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMC7300-LA requirements.
6.How does Aetrix verify that TMC7300-LA is sourced from the original manufacturer or authorized distributors?
All TMC7300-LA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMC7300-LA meets industry standards.
7.What is the process for return or replacement of TMC7300-LA?
All TMC7300-LA units undergo pre-shipment inspection (PSI). If there is an issue with TMC7300-LA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMC7300-LA part is unused and in its original packaging.
Return procedure for TMC7300-LA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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