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[Original In Stock] Supply LM5118MHX (TI) Wide Voltage Range Buck-Boost Controller

In fields such as industrial automation, automotive electronics, and portable devices, power systems often face challenges such as significant fluctuations in input voltage or the need to support both buck and boost conversion simultaneously. Texas Instruments (TI) has introduced the LM5118MHX current-mode asynchronous buck/boost controller, which offers a wealth of features, robust protection mechanisms, and programmability, making it an ideal controller choice for industrial, automotive, and general-purpose high-performance power designs.

Shenzhen Mingjiada Electronics Co., Ltd. — Long-term supplier of TI's LM5118MHX wide input voltage range current-mode asynchronous buck/boost controller, details as follows:

LM5118MHX Core Advantages: Wide Input Range and Flexible Topology

Ultra-wide input range: The LM5118MHX's core advantage lies in its wide input voltage range of 3.5V to 75V, enabling it to easily handle large voltage fluctuations in industrial power buses, automotive battery systems (such as start-stop conditions), and battery-powered devices.

Seamless Buck/Boost Mode Switching: The LM5118MHX employs a unique four-switch topology (H-bridge) that intelligently switches between Buck, Boost, or Buck-Boost modes based on the input-output voltage relationship, ensuring precise regulation of the output voltage. This mode conversion is automatically handled by the LM5118MHX's internal control logic without requiring external intervention.

Current-mode control: The LM5118MHX employs a peak current-mode control architecture. This design combines a voltage outer loop and a current inner loop, delivering excellent line and load transient response performance, simplifying compensation loop design, and incorporating cycle-by-cycle current limiting functionality to enhance system reliability and safety.

LM5118MHX Key Features and Performance Parameters

Adjustable Output Voltage: The output voltage of the LM5118MHX can be set between 1.225V and 70V via an external resistor divider, accommodating various load requirements.

Programmable Switching Frequency: The LM5118MHX allows users to set the switching frequency between 50kHz and 750kHz (via a single resistor). This provides designers with flexibility to optimise efficiency (by selecting a lower frequency) or reduce the size of external components (by selecting a higher frequency).

Robust Drive Capability: The integrated high-current gate driver (with peak sink/source current capability of 2.5A/5A) effectively drives external power MOSFETs, reducing switching losses and improving overall efficiency.

Comprehensive protection features: The LM5118MHX integrates input under-voltage lockout (UVLO), adjustable line under-voltage protection (Brownout), programmable overcurrent protection, thermal shutdown, and bootstrap diode short-circuit protection for boost mode, ensuring safe operation under various abnormal conditions.

Operating temperature range: The LM5118MHX is rated for an operating temperature range of -40°C to +125°C, making it suitable for harsh industrial and automotive environments.

Typical application scenarios for the LM5118MHX

Industrial PLC/DCS systems: Provides stable 24V industrial bus power (often accompanied by significant surges or drops) for various boards (e.g., 5V, 3.3V, 12V).

Automotive electronics: Provides stable voltage for infotainment systems, instrument clusters, or ADAS modules in 12V automotive battery systems (where voltage may drop as low as 3.5V or rise as high as 36V during start-stop operations).

Battery-powered devices: Provides stable output above or below battery voltage in portable devices powered by lithium batteries (e.g., single-cell 3V-4.2V or multi-cell series configurations).

Communication Infrastructure: Power intermediate buses or point-of-load (PoL) converters in base stations or network equipment that require a wide input voltage range.

[Mingjiada Electronics] has been supplying the LM5118MHX for the long term. For the LM5118MHX comparator datasheet, sample requests, or quotes, please contact Mingjiada Electronics:  

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Phone: 13410018555  

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