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LMR33610/30/40 SIMPLE SWITCHER® Synchronous Buck Converters

Texas Instruments

LMR33610/30/40 SIMPLE SWITCHER® Synchronous Buck Converters

Texas Instruments' 1 A, 3 A, or 4 A step-down converters offer ultra-low EMI and are suitable for a variety of industrial applications

Texas Instruments' LMR33610, LMR33630, and LMR33640 SIMPLE SWITCHER regulators are easy-to-use, synchronous, step-down DC/DC converters that deliver best-in-class efficiency for rugged industrial applications. These converters can drive up to 1 A (LMR33610), 3 A (LMR33630), or 4 A (LMR33640) of load current from an input of up to 36 V. The devices provide high light-load efficiency and output accuracy in an ultra-small solution size. Features such as a power-good flag and precision enable provide flexible and easy-to-use solutions for a wide range of applications. The LMR33610/30/40 automatically fold back frequency at light-load to improve efficiency. Integration eliminates most external components and provides a pin-out designed for a simple PCB layout. Protection features include thermal shutdown, input under-voltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection.

The LMR33640, LMR33610, and LMR33630 are pin-to-pin compatible with each other. This minimizes the cost and effort associated with board layout modifications. These devices are available in an 8-pin HSOIC package. The LMR33630 is also available in a 12-pin 3 mm × 2 mm VQFN package with wettable flanks. This device is also available in an AEC-Q100-qualified version.

Features
  • Configured for rugged industrial applications:
    • Input voltage range: 3.8 V to 36 V
    • Output voltage range: 1 V to 24 V
    • Power MOSFETs: 75 mΩ/50 mΩ RDS(ON)
    • Peak-control-mode control
    • Short minimum on-time: 68 ns
    • Junction temperature range: -40°C to +125°C
    • Low EMI and low switching noise
    • Ease-of-use SOIC package
  • Flexible system interface:
    • Power good flag and precision enable
  • Well-suited for scalable industrial power supplies:
    • Pin-compatible
    • Frequency: 400 kHz, 1 MHz, 1.4 MHz, and 2.1 MHz
    • Integrated compensation helps reduce solution size, cost, and design complexity
  • High efficiency solution:
    • Peak efficiency: >95%
    • Low shutdown quiescent current: 5 µA
    • Low operating quiescent current: 25 µA (LMR33610/30) and 24 µA (LMR33640)
Applications
  • Motor drive systems: drones, AC inverters, VF drives, and servos
  • Factory and building automation systems: PLC CPU, HVAC controls, and elevator controls
  • High-efficiency solutions
  • Rugged industrial applications
  • Flexible system interfaces
  • General purpose wide VIN power supplies

LMR33610 1 A DC/DC Converters

ImageManufacturer Part NumberDescriptionFrequency - SwitchingAvailable QuantityView Details
36V 1A 400KHZ REGULATORLMR33610ADDAR36V 1A 400KHZ REGULATOR400kHz2485 - Immediate
10001 - Factory Stock
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36V 1A 1.4MHZ REGULATORLMR33610BDDAR36V 1A 1.4MHZ REGULATOR1.4MHz2258 - Immediate
10001 - Factory Stock
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LMR33640 4 A DC/DC Converters

ImageManufacturer Part NumberDescriptionFrequency - SwitchingAvailable QuantityView Details
36V 4A 1MKZ REGULATORLMR33640DDDAR36V 4A 1MKZ REGULATOR1MHz2262 - Immediate
10001 - Factory Stock
View Details
36V 4A 400KHZ REGULATORLMR33640ADDAR36V 4A 400KHZ REGULATOR400kHz1679 - Immediate
10001 - Factory Stock
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LMR33630 3 A DC/DC Converters

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC REG BUCK ADJUSTABLE 3A 8SOPWRLMR33630ADDARIC REG BUCK ADJUSTABLE 3A 8SOPWR2283 - Immediate
10001 - Factory Stock
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IC REG BUCK ADJUSTABLE 3A 12VQFNLMR33630BRNXRIC REG BUCK ADJUSTABLE 3A 12VQFN6312 - Immediate
10001 - Factory Stock
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IC REG BUCK ADJUSTABLE 3A 12VQFNLMR33630CRNXTIC REG BUCK ADJUSTABLE 3A 12VQFN499 - Immediate
10001 - Factory Stock
View Details
IC REG BUCK ADJUSTABLE 3A 8SOPWRLMR33630BDDARIC REG BUCK ADJUSTABLE 3A 8SOPWR1556 - ImmediateView Details
IC REG BUCK ADJUSTABLE 3A 12VQFNLMR33630ARNXRIC REG BUCK ADJUSTABLE 3A 12VQFN994 - Immediate
10001 - Factory Stock
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IC REG BUCK ADJUSTABLE 3A 8SOPWRLMR33630CDDARIC REG BUCK ADJUSTABLE 3A 8SOPWR557 - Immediate
6890 - Factory Stock
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IC REG BUCK ADJUSTABLE 3A 12VQFNLMR33630BRNXTIC REG BUCK ADJUSTABLE 3A 12VQFN140 - Immediate
10001 - Factory Stock
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IC REG BUCK ADJUSTABLE 3A 12VQFNLMR33630CRNXRIC REG BUCK ADJUSTABLE 3A 12VQFN2468 - Immediate
9072 - Factory Stock
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IC REG BUCK ADJUSTABLE 3A 12VQFNLMR33630ARNXTIC REG BUCK ADJUSTABLE 3A 12VQFN504 - Immediate
8750 - Factory Stock
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Evaluation Boards

ImageManufacturer Part NumberDescriptionFrequency - SwitchingAvailable QuantityView Details
EVAL BOARD FOR LMR33630LMR33630CDDAEVMEVAL BOARD FOR LMR336302.1MHz6 - Immediate
56 - Factory Stock
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EVAL MODULE FOR LMR33630LMR33630ARNXEVMEVAL MODULE FOR LMR33630400kHz3 - Immediate
43 - Factory Stock
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EVAL BOARD FOR LMR33630LMR33630ADDAEVMEVAL BOARD FOR LMR33630400kHz5 - Immediate
33 - Factory Stock
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EVAL MODULE FOR LMR33630LMR33630CRNXEVMEVAL MODULE FOR LMR336302.1MHz3 - Immediate
44 - Factory Stock
View Details