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Texas Instruments LM25143/LM25143-Q1 Dual Buck DC/DC Controller

Texas Instruments LM25143/LM25143-Q1 Dual Synchronous Buck DC/DC Controller is derived from a family of wide-VIN range controllers ideal for high-current single or dual outputs. The LM25143 utilizes an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. Large step-down ratios provided by the high side switch (with a minimum on-time of 65ns) enable direct conversion from 12V or 24V inputs to low-voltage rails for reduced system complexity and cost.

The TI LM25143/LM25143-Q1 Dual Synchronous Buck DC/DC Controller continues to operate during input voltage dips as low as 3.5V, at nearly 100% duty cycle if required. The device supports a 15μA no-load quiescent current with the output voltage in regulation, extending operating time in battery-powered systems. Additionally, powering the LM25143/LM25143-Q1 from the switching regulator's output or another available source allows for even lower input quiescent current and power loss. The LM25143-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 3.5V to 42V
    • 1% accurate, fixed 3.3V, 5V, or adjustable outputs from 0.6V to 36V
    • 150°C maximum junction temperature
    • 4µA typical shutdown mode current
    • 15µA typical no-load standby current
  • Two interleaved synchronous buck channels
    • Dual-channel or single-output multiphase
    • 65ns tON(min) for a high VIN/VOUT ratio
    • 60ns tOFF(min) for low dropout
  • 100kHz to 2.2MHz switching frequency
    • SYNC in and SYNC out capability
    • Selectable diode emulation or FPWM modes
  • Create a custom design using the LM25143 with WEBENCH® Power Designer
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Inherent protection features for robust design
    • Shunt or inductor DCR current sensing
    • Hiccup mode overcurrent protection
    • Independent ENABLE and PGOOD functions
    • Adjustable output voltage soft start
    • VCC, VDDA, and gate-drive UVLO protection
    • Thermal shutdown protection with hysteresis
  • Optimized for CISPR 11 and CISPR 32 class B conducted and radiated EMI requirements
    • Slew-rate controlled adaptive gate drivers
    • Spread spectrum reduces peak emissions
  • 6mm × 6mm VQFN-40 package

Applications

  • Industrial
    • 24V bus systems
    • Factory automation and control
    • Robotics
    • Power delivery
  • Personal electronics
    • Computer peripherals
  • Enterprise systems
    • High-performance computing

Datasheets

Typical Application

Application Circuit Diagram - Texas Instruments LM25143/LM25143-Q1 Dual Buck DC/DC Controller
Published: 2022-04-06 | Updated: 2022-12-18