LM3478QMM

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LM3478QMM

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規格

EU RoHS Not Compliant
ECCN (US) EAR99
Part Status Unconfirmed
HTS 8542.39.00.60
Automotive Yes
PPAP Yes
Minimum Operating Temperature (°C) -40
Maximum Operating Temperature (°C) 125
Mounting Surface Mount
Package Height 0.95(Max)
Package Width 3.1(Max)
Package Length 3.1(Max)
PCB changed 8
Standard Package Name SO
Supplier Package VSSOP
Pin Count 8
Lead Shape Gull-wing
Packaging Tape and Reel
Number of Outputs 1
Topology Step Up
Output Voltage (V) 1.26 to 500
Maximum Output Current (A) 1
Maximum Switching Frequency (kHz) 1000
Minimum Input Voltage (V) 2.97
Maximum Input Voltage (V) 40
Operating Supply Voltage (V) 2.97 to 40
Maximum Supply Current (mA) 2.7(Typ)
Minimum Switching Frequency (kHz) 100
Supplier Temperature Grade Automotive

概述

Description

The LM3478QMM is a versatile, step-up (boost) voltage regulator designed by Texas Instruments. It is primarily used in applications requiring the conversion of lower input voltages to higher output voltages, making it suitable for battery-powered devices, LED drivers, and other portable electronics. This device operates with an input voltage range of 2.97V to 40V and can output adjustable voltages up to 60V, providing flexibility in various applications.
Key features of the LM3478QMM include a high switching frequency up to 1.2 MHz, which allows for smaller external components and improved efficiency. It also incorporates current mode control, enhancing stability and transient response. The device supports both fixed and adjustable output configurations, making it adaptable to specific design needs.
With its robust thermal performance and built-in protection features like over-temperature and over-current protection, the LM3478QMM is an excellent choice for designers looking to implement efficient power management solutions in compact electronic systems.

Features

The LM3478QMM is a versatile DC-DC boost converter designed for power management applications. Key features include:
1. Wide Input Voltage Range: Operates from 3V to 40V, making it suitable for various power sources.
2. Adjustable Output Voltage: The output voltage can be set from 1.25V to 40V, providing flexibility for different applications.
3. High Efficiency: Typically achieves up to 95% efficiency, reducing energy loss and heat generation.
4. Switching Frequency: Offers a fixed switching frequency of 1.2MHz for improved performance and reduced component size.
5. Current Limiting: Built-in current limit protection helps safeguard against overload conditions.
6. Soft Start: Integrated soft-start feature minimizes inrush current during startup.
7. Thermal Shutdown: Protects the device from overheating with an automatic shutdown feature.
8. Compact Package: Available in a surface-mount QFN package, suitable for space-constrained designs.
These features make the LM3478QMM ideal for applications in battery-powered devices, LED drivers, and industrial power supplies.

Package

The LM3478QMM is packaged in a 14-pin QFN (Quad Flat No-lead) format. This package type offers a compact design suitable for efficient thermal performance and space-saving in circuit board layouts.

Pinout

The LM3478QMM is a high-performance, adjustable step-up (boost) converter from Texas Instruments. It features a 16-pin QFN package (QMM) with the following key pins:
1. VIN - Input voltage.
2. SW - Switch node for connecting to the inductor.
3. GND - Ground reference.
4. VOUT - Output voltage.
5. COMP - Compensation node for stability.
6. FB - Feedback voltage for regulation.
7. CSN/ CSP - Current sense pins for overcurrent protection.
8. RAMP - Ramp voltage input for slope compensation.
9. ISENSE - Input for current sensing.
10. EN - Enable pin to activate the converter.
11. SS - Soft-start pin to control the startup time.
12. FREQ - Frequency setting pin for switching frequency adjustment.
13. GATE - Gate driver output for the external switch.
14. N/C - Not connected pins (can be left floating).
15. PGND - Power ground for high current paths.
16. AGND - Analog ground for sensitive circuitry.
The LM3478QMM is designed for applications requiring efficient power conversion, such as LED drivers and battery-operated devices.

Manufacturer

The LM3478QMM is manufactured by Texas Instruments (TI), a leading global semiconductor company. Texas Instruments specializes in designing and manufacturing a wide range of semiconductor products, including analog, embedded processing, and digital signal processing devices. The company serves various industries, including automotive, industrial, communications, consumer electronics, and medical. TI is well-known for its innovation in integrated circuits and offers a broad portfolio that supports diverse applications in electronics and technology.

Application

The LM3478QMM is a versatile DC-DC boost converter primarily used in applications such as power supply for LED drivers, battery management systems, portable devices, and industrial equipment. It is suitable for generating high output voltages from low input voltages, making it ideal for applications requiring efficient energy conversion, voltage regulation, and power management in compact designs.

Equivalent

The LM3478QMM is a step-up (boost) voltage regulator. Equivalent products include:
1. TPS61023 (Texas Instruments)
2. LT1302 (Analog Devices)
3. MAX860 (Maxim Integrated)
4. MIC2544 (Microchip)
5. NCP1402 (ON Semiconductor)
These alternatives also provide similar functionality in boosting voltage applications. Always check specific requirements like input/output voltage, current ratings, and efficiency before substitution.

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