LM3478MMX
This switching controller, LM3478MMX, is designed to deliver consistent and reliable performance in demanding environmentsLM3478MMX
This switching controller, LM3478MMX, is designed to deliver consistent and reliable performance in demanding environments
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Manufacturer Part # : LM3478MMX
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Package/Case: MSOP-8
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Brand: Texas Instruments
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Product Categories : DC DC Switching Controllers
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Service & Packaging
Service & Packaging
About After Sales Service
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Initiate the application within 90 days from the shipment date.
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LM3478MMX DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
Catering to a wide array of applications, the LM3478MMX by Texas Instruments excels as a high-efficiency switching regulator. With a 2A continuous output current and a fixed frequency of 260 kHz, it offers rapid transient response and dependable operation. Its broad input voltage range of 4.5V to 42V makes it well-suited for automotive, industrial, and telecommunications uses. Additionally, its voltage feedforward design ensures exemplary line and load regulation. Equipped with cycle-by-cycle current limiting, thermal shutdown protection, and adjustable soft-start, the LM3478MMX prioritizes reliability. Housed in an exposed-pad SOIC package, the regulator simplifies heat dissipation and enhances thermal performance
Key Features
- This DC-DC converter is highly efficient
- It has a compact size of 9mm x 10.5mm x 1.4mm
- The LM34 features low noise operation and high power density
Application
- Energy-efficient lighting solution
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Product Category ! | Switching Controllers | RoHS | N |
Number of Outputs | 1 Output | Switching Frequency ! | 100 kHz to 1 MHz |
Duty Cycle - Max | 100 % | Input Voltage | 2.97 V to 40 V |
Output Voltage | 1.26 V | Output Current ! | 1 A |
Minimum Operating Temperature | - 40 C | Maximum Operating Temperature ! | + 125 C |
Mounting Style | SMD/SMT | Package / Case | MSOP-8 |
Brand | Texas Instruments | Product Type ! | Switching Controllers |
Factory Pack Quantity | 3500 | Subcategory | PMIC - Power Management ICs |
Type | Step Up |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is LM3478MMX?
The LM3478MMX is a high-efficiency, constant-on-time synchronous buck regulator designed by Texas Instruments. It is ideal for applications requiring efficient power conversion, such as power supplies, LED lighting, and battery chargers.
How Does LM3478MMX Work?
The LM3478MMX operates as a synchronous buck regulator, converting a higher input voltage to a lower output voltage with high efficiency. It utilizes a constant-on-time control architecture to regulate the output voltage, providing a fast transient response and reducing output capacitance requirements. The regulator features a wide input voltage range and adjustable switching frequency to accommodate various power conversion needs.
How Many Pins does LM3478MMX have and What are the Functions of the Pinout Configuration?
The LM3478MMX is housed in a 10-pin VSSOP (Very Small Outline Package) package. The pinout configuration includes:
- SW: Switch node connection for the internal power switch.
- BOOT: Bootstrap capacitor connection for the high-side gate drive.
- PH: Phase node connection for the internal power switch.
- RT/CLK: Setting the oscillator frequency and slope compensation capacitor connection.
- COMP: Error amplifier output pin for adjustable control loop compensation.
- FB: Feedback input pin for regulating the output voltage.
- EN: Enable pin for turning the regulator on or off.
- PGND: Power ground connection.
- SS/TR: Soft-start/tracking capacitor connection.
- AGND: Analog ground connection.
What are the Pros and Cons of LM3478MMX?
Pros:
- High Efficiency: Achieves high efficiency in power conversion, reducing power dissipation and heat generation.
- Wide Input Voltage Range: Suitable for a variety of input voltage levels, enhancing flexibility in application design.
- Adjustable Frequency: Allows the switching frequency to be adjusted for optimization of the circuit performance.
- Synchronous Rectification: Utilizes synchronous rectification for improved efficiency.
- Compact Package: The VSSOP package provides space-efficient integration in compact designs.
Cons:
- External Components: May require external components such as inductors, capacitors, and diodes for a complete regulator design.
- Complexity: Synchronous buck regulators may require careful attention to layout and noise considerations for optimal performance.
- Heat Dissipation: While high efficiency is achieved, consideration of heat dissipation in high-power applications is necessary.
Are There Any Equivalents/Alternatives to LM3478MMX for Recommendation?
- The LM3150 from Texas Instruments is a similar synchronous buck regulator with additional features.
- Alternatives to the LM3478MMX include the LT8610 from Analog Devices and the TPS53515 from Texas Instruments.
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