LM5119PSQX/NOPB Dual Synchronous Buck Controller
The LM5119PSQX/NOPB is a high-performance dual synchronous buck controller designed by Texas Instruments, tailored for applications demanding high efficiency, wide input voltage range, and precision voltage regulation. This controller is suitable for both independent dual output and single interleaved high-current applications, providing remarkable flexibility for power designers.
Key Features
· Wide Input Range (5.5V - 65V): Accommodates a variety of industrial and telecom power sources, making it suitable for demanding environments.
· Emulated Peak Current Mode Control: This control method provides cycle-by-cycle current limiting, rapid transient response, and enhanced noise immunity for high-frequency applications.
· Configurable Outputs: Can operate in dual-output mode or a single high-current output mode with interleaved channels, offering versatility.
· Programmable Switching Frequency (up to 750 kHz): Allows optimization of power efficiency and thermal management.
· Comprehensive Protection Mechanisms: Includes programmable soft-start, thermal shutdown, current limiting, and an optional diode emulation mode, enhancing system stability and component longevity.
Applications
· Industrial DC-DC Motor Drivers: Suitable for controlling motor speeds and torque in automation and robotics.
· Telecom Power Supply: Ideal for powering components in servers, routers, and network infrastructures.
· Automotive Electronics: Can support a range of automotive applications, including infotainment and advanced driver assistance systems (ADAS), where efficiency and robustness are critical.
Compatible Component Series for LM5119PSQX/NOPB
To fully leverage the LM5119, integrating compatible components is essential. Below are five recommended component series that complement the controller in various applications.
1.MOSFET Series:Infineon OptiMOS™
· Category: Power MOSFETs
· Parameter Values: 40V to 100V, Rdson < 10mΩ, continuous drain current up to 50A.
· Application Scenarios: Ideal for high-efficiency power switching in DC-DC converters.
· Recommended Model: BSC123N08NS3 G (N-channel, 80V, 10mΩ Rdson)
2.Inductor Series: Coilcraft XAL Family
· Category: High-Current Inductors
· Parameter Values: Inductance range from 10 µH to 100 µH, current rating up to 40A.
· Application Scenarios: Provides stable inductance with minimal core losses for energy storage in power supply circuits.
· Recommended Model: XAL7070-103MEB (10µH, 30A)
3.Capacitor Series: Murata GRM Series (High-Reliability MLCCs)
· Category: Ceramic Capacitors
· Parameter Values: Capacitance ranges from 10 µF to 100 µF, rated for up to 100V.
· Application Scenarios: For stable output smoothing and transient suppression.
· Recommended Model: GRM31CR61E106KA12 (10 µF, 25V, X5R dielectric)
4.Sense Resistor Series: Vishay WSLP Series
· Category: Low-Ohmic Current Sense Resistors
· Parameter Values: 1mΩ to 100mΩ, 1W to 5W power rating.
· Application Scenarios: Used for precise current monitoring in overcurrent protection.
· Recommended Model: WSLP1206R0100FEA (0.01Ω, 2W)
5.Diode Series: ON Semiconductor MBR Series (Schottky Diodes)
· Category: Fast-Recovery Rectifiers
· Parameter Values: Voltage ratings from 30V to 100V, low forward voltage drop.
· Application Scenarios: Ensures efficiency in the power loop by minimizing losses in the converter.
· Recommended Model: MBR735 (7.5A, 35V Schottky diode)
