Texas Instruments

LMR51603-Q1 4.5 V to 65 V 0.3 A Synchronous Buck Converter

Texas Instruments 4.5 V to 65 V 0.3 A synchronous buck converters feature 25 µA quiescent current

Image of Texas Instruments LMR51603-Q1 4.5 V to 65 V 0.3 A Synchronous Buck Converter The Texas Instruments LMR51603-Q1 is a wide-VIN, easy-to-use, synchronous buck converter capable of driving up to 300 mA load current. With a wide input range of 4 V to 65 V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR51603-Q1 operates at 400 kHz switching frequency to support using relatively small inductors for an optimized design size. It has a pulse frequency modulation (PFM version) to realize high efficiency at light load and forced pulse width modulation (FPWM version) to achieve constant frequency and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally, which allow the device to be used with minimal external components.

The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation.

Features
  • AEC-Q100 qualified
    • Temperature grade 1: -40°C to +125°C ambient operating temperature range
  • Configured for rugged industrial applications
    • 4 V to 65 V input voltage range
    • Input transient protection up to 70 V
    • 300 mA continuous output current
    • 80 ns minimum switching on time
    • Fixed 400 kHz switching frequency
    • -40°C to +150°C junction temperature range
    • 96% maximum duty cycle
    • Monotonic start-up with pre-biased output
    • Short-circuit protection with hiccup mode
    • Precision enable
  • Functional  
    • Documentation available to aid functional safety system design
  • Small design size and ease of use
    • Integrated synchronous rectification
    • Internal compensation for ease of use
  • Various options in pin-to-pin compatible package
    • PFM and forced PWM (FPWM) options
  • Pin-to-pin compatible with the LMR16006Y-Q1, LM2842-Q1, LMR50410-Q1, and TPS560430-Q1
  • Create a custom design using the LMR51603-Q1 with the WEBENCH Power Designer
Applications
  • Body electronics and lighting
  • Infotainment and clusters
  • Advanced driver assistance systems (ADAS)

LMR51603-Q1 4.5 V to 65 V 0.3 A Synchronous Buck Converter

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
4.5V-TO-65V 0.3A SYNCHRONOUS BUCLMR51603XFQDBVRQ14.5V-TO-65V 0.3A SYNCHRONOUS BUC1684 - Immediate$1.18View Details
Published: 2024-12-04