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Texas Instruments LM25145 Synchronous Buck DC-DC Controller

Texas Instruments LM25145 Synchronous Buck DC-DC Controller is designed to regulate from a high input voltage source or from an input rail subject to high voltage transients. This feature minimizes the need for external surge suppression components. A high-side switch minimum on-time of 40ns facilitates large step-down ratios, enabling the direct step-down conversion from a 24V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM25145 continues to operate during input voltage dips as low as 6V, at nearly 100% duty cycle if needed. This option makes the device well suited for high-performance industrial control, robotic, datacom, and RF power amplifier applications.

Features

  • Versatile synchronous buck DC-DC controller
    • Wide input voltage range of 6V to 42V
    • Adjustable output voltage From 0.8V to 40V
  • Meets EN55022 / CISPR 22 EMI standards
  • Lossless RDS(on) or shunt current sensing
  • Switching frequency from 100kHz to 1MHz
    • SYNC In and SYNC out capability
  • 40ns Minimum on-time for high VIN / VOUT ratio
  • 140ns Minimum off-time for low dropout
  • 0.8V Reference with ±1% feedback accuracy
  • 7.5V Gate drivers for standard VTH MOSFETs
    • 14ns Adaptive dead-time control
    • 2.3A Source and 3.5A sink capability
    • Low-side soft-start for pre-biased start-up
  • Adjustable soft-start or optional voltage tracking
  • Fast line and load transient response
    • Voltage-mode control with line feedforward
    • High gain-bandwidth error amplifier
  • Precision enable input and open-drain power good indicator for sequencing and control
  • Inherent protection features for robust design
    • Hiccup mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and Gate drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • VQFN-20 Package with wettable flanks

Applications

  • Telecom infrastructure
  • Factory automation
  • Test and measurement
  • Industrial motor drives

Videos

Featured EVM

Texas Instruments LM5145EVM-HD-20A Buck Controller EVM

Designed to showcase the performance of the LM5145, a synchronous buck DC-DC buck controller.

Learn MoreInformazioni su Texas Instruments LM5145EVM-HD-20A Buck Controller EVM View ProductsCorrelato a Texas Instruments LM5145EVM-HD-20A Buck Controller EVM
Pubblicato: 2017-08-14 | Aggiornato: 2022-04-13