LT3478EFE-1#TRPBF

Product Overview

Category

The LT3478EFE-1#TRPBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various electronic devices and systems to efficiently regulate and control power supply voltages.

Characteristics

• High efficiency: The LT3478EFE-1#TRPBF offers high efficiency power conversion, minimizing energy loss.
• Wide input voltage range: It can handle a wide range of input voltages, making it suitable for diverse applications.
• Adjustable output voltage: The IC allows for adjustable output voltage levels, providing flexibility in power supply design.
• Compact package: It comes in a small form factor package, enabling space-saving integration into electronic devices.
• Low quiescent current: The LT3478EFE-1#TRPBF has low quiescent current consumption, reducing power wastage during standby or idle modes.

Package and Quantity

The LT3478EFE-1#TRPBF is available in a 16-pin TSSOP (Thin Shrink Small Outline Package). It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input Voltage Range: 2.5V to 40V
• Output Voltage Range: 0.8V to 36V
• Maximum Switching Frequency: 1MHz
• Operating Temperature Range: -40°C to 125°C
• Quiescent Current: 100µA (typical)

Pin Configuration

The LT3478EFE-1#TRPBF features the following pin configuration:

1. SW: Switch node connection for external inductor.
2. GND: Ground reference for the IC.
3. FB: Feedback pin for setting the output voltage.
4. VCC: Supply voltage input for the IC.
5. SS: Soft-start capacitor connection.
6. COMP: Compensation pin for stability control.
7. RT/CLK: Resistor-capacitor network for setting switching frequency or external clock synchronization.
8. SYNC: Synchronization input for external clock.
9. VIN: Input voltage supply.
10. LX: Inductor connection.
11. PGND: Power ground reference.
12. EN: Enable pin for turning on/off the IC.
13. BST: Bootstrap capacitor connection.
14. AGND: Analog ground reference.
15. SS/TR: Soft-start and tracking pin.
16. VOUT: Output voltage.

Functional Features

• High-efficiency step-up, step-down, and inverting power conversion.
• Adjustable output voltage through feedback pin (FB).
• Programmable switching frequency using external resistor-capacitor network (RT/CLK).
• Synchronization capability with an external clock source (SYNC).
• Soft-start and tracking functionality for controlled startup and shutdown.
• Overvoltage protection (OVP) and overcurrent protection (OCP) features.
• Thermal shutdown protection to prevent IC damage due to excessive temperature.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power consumption and longer battery life.
• Wide input voltage range allows for compatibility with various power sources.
• Compact package enables space-saving integration into electronic devices.
• Adjustable output voltage provides flexibility in power supply design.
• Low quiescent current minimizes power wastage during standby or idle modes.

Disadvantages

• Limited maximum switching frequency may not be suitable for applications requiring ultra-high-speed power conversion.
• Lack of built-in protection against reverse polarity or short circuits may require additional external circuitry.

Working Principles

The LT3478EFE-1#TRPBF operates based on a pulse-width modulation (PWM) control scheme. It utilizes an internal power switch and synchronous rectification to achieve high-efficiency power conversion. The IC regulates the output voltage by adjusting the duty cycle of the switching waveform.

When the input voltage is applied, the LT3478EFE-1#TRPBF starts operating and generates a regulated output voltage based on the feedback signal received at the FB pin. The switching frequency can be set using external components connected to the RT/CLK pin or synchronized with an external clock source via the SYNC pin.

The soft-start and tracking feature ensures controlled startup and shutdown of the IC, preventing excessive inrush current or voltage overshoot. The LT3478EFE-1#TRPBF also incorporates various protection mechanisms such as overvoltage and overcurrent protection, as well as thermal shutdown, to safeguard the IC and the connected circuitry.

Application Field Plans

The LT3478EFE-1#TRPBF finds applications in a wide range of electronic devices and systems, including but not limited to:

1. Battery-powered portable devices: Enables efficient power management for smartphones, tablets, and wearable devices.
2. Automotive electronics: Provides regulated