LMR33630 SIMPLE SWITCHER® Buck Converter

By Texas Instruments 40

LMR33630 SIMPLE SWITCHER® Buck Converter

Texas Instruments' LMR33630 SIMPLE SWITCHER regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33630 can drive up to 3 A of load current from an input of up to 36 V. The device provides high light-load efficiency and output accuracy in an ultra-small solution size. Features such as a power-good flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. The LMR33630 automatically folds 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 converter is available in an 8-pin HSOIC package and in a 12-pin, 3 mm × 2 mm VQFN package with wettable flanks. This device is available in an AEC-Q100 qualified version.

  • Peak efficiency: > 95%
  • Low shutdown quiescent current: 5 µA
  • Low operating quiescent current: 25 µA
  • Power-good flag and precision enable
  • Input voltage range: 3.8 V to 36 V
  • Output voltage range: 1 V to 24 V
  • Output current: 3 A
  • 75 mΩ/50 mΩ RDS(ON) power MOSFETs
  • Peak current mode control
  • Short minimum on-time of 68 ns
  • Frequency: 400 kHz, 1.4 MHz, and 2.1 MHz
  • Junction temperature range: -40°C to +125°C
  • Low EMI and low switching noise
  • Integrated compensation network
  • 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