The L4978D is a step-down switching regulator capable of delivering up to 2A with an adjustable output voltage ranging from 3.3V to 50V. It operates within a wide input voltage range of 8V to 55V and features a maximum switching frequency of 300KHz. The device incorporates several protective features including pulse-by-pulse current limiting, hiccup mode for short circuit protection, thermal shutdown, and a soft-start function. It is available in a SO16W package suitable for surface mount assembly. The L4978D is designed for applications requiring efficient voltage regulation with low power dissipation and high reliability.
2A DC/DC Controller, 55V In, 50V Out, 300kHz, SO Package Product overview: L4978D from STMicroelectronics is a Voltage Regulator IC for stable power rails, DC-DC conversion, battery-powered electronics, automotive modules, and embedded power management. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include 2A, 55V, 50V. Search-friendly keywords include voltage regulator, LDO, buck converter, boost converter, power rail, 2A, 55V, 50V, Voltage Regulator IC, DC Switching Voltage Regulators. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 739-L4978D can be used for catalog matching and distributor lookup.
"Buck Switching Regulator IC Positive Adjustable 3.3V 1 Output 2A 16-SOIC (0.295"", 7.50mm Width)"
Manufacturer: STMicroelectronics
Win Source Part Number: 088844-L4978D
Packaging: Reel - TR
Mounting: SMD (SMT)
Output Type: Adjustable
Topology: Buck
Frequency - Switching: 100kHz to 300kHz
Number of Outputs: 1
Synchronous Rectifier: No
Output Current: 2A
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: -40°C to 150°C (TJ)
Case / Package: 16-SO
Purpose: Step-Down
Maximum Input Voltage: 55V
Nominal Output Voltage (Min/Fixed): 3.3V
Maximum Output Voltage: 50V
Minimum Input Voltage: 8V
Is this a common-used part?: Yes
Popularity: High
Fake Threat In the Open Market: 51 pct.
Supply and Demand Status: Balance
IC REG BUCK ADJUSTABLE 2A 16SOIC
STMicroelectronics L4978D Buck Converter
STMicroelectronics L4978D Buck Converter
STMicroelectronics L4978D Buck Converter
Buck Switching Regulator IC Positive Adjustable 3.3V 1 Output 2A 16-SOIC (0.295", 7.50mm Width)
IC REG BUCK ADJUSTABLE 2A 16SOIC
IC REG BUCK ADJUSTABLE 2A 16SOIC
Switching Voltage Regulators 3.3 to 50V Step-Down
| ERSAELECTRONICS PTE. LTD. | DigiKey | Win Source Electronics | ODG (Origin Data Global) | RS Components, Ltd. | RS Components, Ltd. | Quarktwin Technology Ltd. | Shenzhen Shengyu Electronics Technology Limited | Lingto Electronic Limited | VAST STOCK CO., LIMITED | |
|---|---|---|---|---|---|---|---|---|---|---|
| Product Category | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators |
| Product Number | 739-L4978D | 497-5794-5-ND | 088844-L4978D | L4978D | 6868237 | 6868237P | L4978D | L4978D | L4978D | L4978D |
| Product Name | 2A 55V 50V Voltage Regulator IC | Voltage Regulators - DC DC Switching Regulators | PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - L4978D | Voltage Regulators - DC DC Switching Regulators | Switching Regulators | Switching Regulators | Voltage Regulators - DC DC Switching Regulators | Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators | PMIC - Voltage Regulators - DC DC Switching Regulators | Switching Voltage Regulators |
| Output Voltage Type | Adjustable / Variable | Adjustable / Variable | Adjustable / Variable; Adjustable | Adjustable / Variable | Adjustable / Variable | Adjustable / Variable; Adjustable | Adjustable / Variable | |||
| Package Type | Other; SO | SOIC; Other; "16-SOIC (0.295"", 7.50mm Width)" | Other; 16-SO | SOIC; Other; 16-SOIC (0.295", 7.50mm Width) | SOIC; Other; Soic w | SOIC; Other; 16-SOIC (0.295\", 7.50mm Width) | SOIC | |||
| Output Voltage | 50 volts | 3.3 to 50 volts | 3.3 volts | 3.3 volts | 3.3 to 50 volts | 3.3 volts | ||||
| IOUT | 2 amps | 2 amps | 2 amps | 2 amps | 2 amps | 2 amps | 2 amps | 2 amps | 2 amps | |
| VIN | 55 volts | 8 to 55 volts | 55 volts | 55 volts | 8 to 55 volts |
