Dc-Dc Switching Buck Step Down Regulator, Adjustable, 15V-50Vin, 5.1V-40Vout, 10Aout, Multiwatt15-15 Rohs Compliant: Yes |Stmicroelectronics L4970A

L4970A – 10A Step-Down Switching Regulator – STMicroelectronics

The L4970A from STMicroelectronics is a high-efficiency DC-DC buck converter IC designed for demanding power supply applications. This adjustable step-down regulator delivers up to 10A output current with wide input voltage flexibility, making it ideal for industrial and embedded systems requiring robust voltage conversion. PCX ensures genuine STMicroelectronics components with reliable stock and expedited shipping.

Key Features

• 10A Continuous Output Current for high-power applications
• Wide Input Voltage Range: 15V to 50V DC
• Adjustable Output: 5.1V to 40V configuration
• 200kHz Switching Frequency for compact designs
• Industrial Temperature Range: -40°C to +150°C (TJ)
• Through-Hole Mounting: Multiwatt-15 package

Technical Specifications

This monolithic switching regulator features a buck topology with positive output configuration. It operates at 200kHz fixed frequency without synchronous rectification. The vertical, bent, and staggered leads of the Multiwatt-15 package (15-Multiwatt) facilitate secure through-hole mounting in high-vibration environments. The device requires minimal external components for full operation.

Typical Applications

• Industrial power supplies and motor controllers
• Telecommunications infrastructure equipment
• Embedded computing systems and server modules
• Automotive electronics and battery charging systems
• Test and measurement instrumentation

About STMicroelectronics

STMicroelectronics is a global semiconductor leader with over 30 years of innovation in power management solutions. Their expertise in analog devices and energy-efficient technologies has established industry benchmarks for reliability in automotive, industrial, and computing applications.

STMicroelectronics maintains rigorous quality certifications (AEC-Q100, ISO/TS 16949) ensuring components meet stringent operational requirements. Their vertical integration from silicon design to final testing guarantees consistent performance across production batches, making them a preferred supplier for mission-critical systems.

About DC-DC Switching Regulators

Switching regulators like the L4970A efficiently convert higher DC voltages to lower levels with minimal power loss compared to linear regulators. Their pulse-width modulation (PWM) technology enables compact designs with superior thermal performance, especially crucial in high-current applications where heat dissipation is critical.

Buck converters specifically reduce input voltage while maintaining stable output under load variations. This functionality powers sensitive digital circuits, motors, and processors across industries where voltage stability directly impacts system reliability and longevity. Proper selection ensures optimal efficiency in power-sensitive designs.

Packaging Information

Available in protective tube packaging for secure handling and automated assembly. Contact PCX for volume-specific packaging options.

Frequently Asked Questions

Question: What is the efficiency rating of the L4970A?
Answer: Typical efficiency exceeds 90% under optimal conditions (refer to datasheet for load-specific curves).

Question: Does this regulator require external heatsinking?
Answer: Yes, the Multiwatt-15 package requires a heatsink for full 10A operation due to thermal dissipation needs.

Question: Is the output voltage user-adjustable?
Answer: Yes, configure output between 5.1V–40V using external resistors per the datasheet design guidelines.

Question: Can this IC operate in automotive environments?
Answer: With proper design considerations for transient protection and -40°C to +150°C junction temperature capability, yes.

Question: What protection features does it include?
Answer: Built-in thermal shutdown, current limiting, and under-voltage lockout (UVLO) protection.

Question: Is this part RoHS compliant?
Answer: Yes, the L4970A meets RoHS 3 compliance standards.

Product image is representational. Download the datasheet from our product page for complete specifications.

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