LMR33640DDDAR

The LMR33640 SIMPLE SWITCHER regulator is an easy-to-use synchronous step-down DC/DC converter that delivers excellent efficiency for demanding industrial applications. The LMR33640 can drive up to 4A of load current from input voltages up to 36V. The LMR33640 provides high light-load efficiency and output accuracy. Features such as power good flag and precision enable facilitate flexible, easy-to-use solutions across a wide range of applications. The LMR33640 automatically folds back switching frequency at light loads to improve efficiency. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limiting, and hiccup short-circuit protection. Through integration and internal compensation, the device reduces external component count and offers a pin arrangement designed for simple PCB layout. The feature set is designed to simplify implementation across a variety of end products. The LMR33640 is pin-to-pin compatible with the LMR33610, LMR33620, LMR33630 (36V, 1A/2A/3A) and LMR36510 (65V, 1A) and LMR36520 (65V, 2A), completing a scalable SIMPLE SWITCHER power family. This reduces cost and minimizes the effort associated with board layout modifications. The LMR33640 is available in an 8-pin HSOIC package.

Applications

• Motor drive systems: drones, AC inverters, variable frequency drives, servo systems
• Factory and building automation systems: PLC, HMI, HVAC systems, elevator main control boards
• Wide input voltage DC/DC power supplies

Key features

• Functional Safety documentation available to support functional safety system design, dedicated to demanding industrial applications
• Input voltage range: 3.8V to 36V
• Output voltage range: 1V to 24V
• Peak current mode control
• Junction temperature range: -40°C to +125°C
• Easy-to-use SOIC package
• Ideal for scalable industrial power supplies
• Pin-compatible with: LMR33610, LMR33620, and LMR33630 (36V, 1A, 2A, or 3A), LMR36510 and LMR36520 (65V, 1A or 2A)
• 400kHz and 1MHz switching frequency
• Integrated compensation helps reduce solution size, cost, and design complexity