L4978 Integrated Circuits (ICs) |
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Allicdata Part #: | 497-6701-5-ND |
Manufacturer Part#: |
L4978 |
Price: | $ 0.00 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | STMicroelectronics |
Short Description: | IC REG BUCK ADJ 2A 8DIP |
More Detail: | Buck Switching Regulator IC Positive Adjustable 3.... |
DataSheet: | L4978 Datasheet/PDF |
Quantity: | 1090 |
Voltage - Output (Min/Fixed): | 3.3V |
Base Part Number: | L4978 |
Supplier Device Package: | 8-DIP |
Package / Case: | 8-DIP (0.300", 7.62mm) |
Mounting Type: | Through Hole |
Operating Temperature: | -40°C ~ 150°C (TJ) |
Synchronous Rectifier: | No |
Frequency - Switching: | 100kHz ~ 300kHz |
Current - Output: | 2A |
Voltage - Output (Max): | 50V |
Series: | -- |
Voltage - Input (Max): | 55V |
Voltage - Input (Min): | 8V |
Number of Outputs: | 1 |
Output Type: | Adjustable |
Topology: | Buck |
Output Configuration: | Positive |
Function: | Step-Down |
Part Status: | Active |
Packaging: | Tube |
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L4978 Application Field and Working Principle
L4978 is a DC-DC switching regulator that is used to modify, regulate and control the output voltage level in a number of applications. It belongs to the family of Power Management Integrated Circuits (PMICs) which specialize in power regulation and switching. The device operates on a high switching frequency and low output ripple, making it an ideal option for a number of applications.
Overview
L4978 features a wide input voltage range of 5.5V to 24V, allowing it to be used in a variety of applications. The device has an adjustable output voltage that can be set from 5V to 48V, making it an ideal choice for applications which require a range of different output voltage levels. The device is capable of delivering maximum load currents up to 900mA, making it suitable for a range of different tasks. Additionally, the device is feature rich, providing protection against over-voltage, over-current, thermal shutdown, and reverse current.
Applications
Due to its high switching frequency, low output ripple and wide voltage range, the L4978 can be used in a wide variety of applications. The device can be used as a power supply for a vast number of applications, from general purpose power supplies to automotive and industrial purposes. The device is also suitable for battery powered applications and DC-DC converters, providing a regulated output and efficient operation.
Working Principle
The L4978 works by operating on two core principles, pulse width modulation (PWM) and linear feedback control. The PWM technique allows the device to maintain a stable output voltage by controlling the width of the pulses sent to the output stage, while the linear feedback control is used to ensure that the output voltage does not deviate more than a set amount from the expected level. The device features a frequency of up to 150kHz, reducing electromagnetic interference.
The L4978 features an internal overvoltage protection (OVP) circuit which monitors the output voltage and protects the device from its own output going beyond the safe limit. It also features a current limit circuit, allowing it to regulate the output current in order to protect the other components in the circuit from excessive current during start-up or short-circuits.
In order to prevent overheating, the device features a Thermal Shutdown (TSD) circuit, which monitors the external temperature of the device and shuts down the device if it reaches a certain temperature threshold. Additionally, it also has a reverse current protection circuit which moves the current away from the output stage and protects it from reverse current.
Conclusion
The L4978 DC-DC switching regulator is an ideal choice for a wide variety of applications, due to its wide input voltage range and adjustable output voltage range, as well as its high switching frequency and low ripple. The device’s feature rich design provides a number of protection mechanisms, such as OVP, current limit, thermal shutdown and reverse current protection, making it an effective and reliable device for all sorts of applications.
The specific data is subject to PDF, and the above content is for reference
Part Number | Manufacturer | Price | Quantity | Description |
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L4971D013TR | STMicroelect... | -- | 1000 | IC REG BUCK ADJ 1.5A 16SO... |
L4979DTR-E | STMicroelect... | -- | 5000 | IC REG LINEAR 5V 150MA 8S... |
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L4973V3.3 | STMicroelect... | -- | 1000 | IC REG BUCK ADJ/3.3V 3.5A... |
L4973V5.1 | STMicroelect... | -- | 1000 | IC REG BUCK ADJ/5.1V 3.5A... |
L4973D3.3-013TR | STMicroelect... | -- | 1000 | IC REG BUCK ADJ/3.3V 3.5A... |
L4973D3.3 | STMicroelect... | -- | 1000 | IC REG BUCK ADJ/3.3V 3.5A... |
L4976D013TR | STMicroelect... | -- | 1000 | IC REG BUCK ADJ 1A 16-SOI... |
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L497D1 | STMicroelect... | -- | 1000 | IC CTRLR HALL EFFECT IGN ... |
E-L4971D | STMicroelect... | 0.0 $ | 1000 | IC REG BUCK ADJ 1.5A 16SO... |
E-L4973V3.3 | STMicroelect... | 0.0 $ | 1000 | IC REG BUCK ADJ/3.3V 18PW... |
E-L4971D013TR | STMicroelect... | 0.0 $ | 1000 | IC REG BUCK ADJ 1.5A 16SO... |
E-L4978D | STMicroelect... | 0.0 $ | 1000 | IC REG BUCK ADJ 2A 16SOIC... |
L4979D013TR | STMicroelect... | -- | 1000 | IC REG LINEAR 5V 150MA 8S... |
L4979D | STMicroelect... | -- | 1000 | IC REG LINEAR 5V 150MA 8S... |
L4979D-E | STMicroelect... | 0.43 $ | 1000 | IC REG LINEAR 5V 150MA 8S... |
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L4973D5.1-013TR | STMicroelect... | -- | 2000 | IC REG BUCK ADJ/5.1V 3.5A... |
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L4978D | STMicroelect... | -- | 242 | IC REG BUCK ADJ 2A 16SOIC... |
L4973D5.1 | STMicroelect... | -- | 176 | IC REG BUCK ADJ/5.1V 3.5A... |
L4972AD013TR | STMicroelect... | -- | 1000 | IC REG BUCK ADJ 2A 20SOIC... |
L4972AD | STMicroelect... | -- | 48 | IC REG BUCK ADJ 2A 20SOIC... |
L4976D | STMicroelect... | -- | 70 | IC REG BUCK ADJ 1A 16SOIC... |
L4978D013TR | STMicroelect... | -- | 1000 | IC REG BUCK ADJ 2A 16SOIC... |
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