LTC3446IDE#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High Efficiency - Low Quiescent Current - Small Package Size - Wide Input Voltage Range

Package: DFN-10

Essence: The LTC3446IDE#PBF is a high-efficiency, low quiescent current synchronous buck regulator. It is designed to provide power management solutions for various electronic devices.

Packaging/Quantity: The LTC3446IDE#PBF is available in a DFN-10 package and is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Maximum Output Current: 600mA
• Switching Frequency: 1MHz
• Quiescent Current: 20µA
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LTC3446IDE#PBF has the following pin configuration:

1. VIN: Input Voltage
2. SW: Switch Node
3. GND: Ground
4. FB: Feedback Voltage
5. EN: Enable Pin
6. SS: Soft-Start Capacitor
7. PGND: Power Ground
8. VOUT: Output Voltage
9. LX: Inductor Connection
10. BST: Boost Capacitor Connection

Functional Features

• High Efficiency: The LTC3446IDE#PBF utilizes a synchronous buck topology, which ensures high efficiency power conversion.
• Low Quiescent Current: With a quiescent current of only 20µA, the LTC3446IDE#PBF minimizes power consumption during standby or light load conditions.
• Wide Input Voltage Range: The device can accept input voltages ranging from 2.5V to 5.5V, making it suitable for a wide range of applications.
• Adjustable Output Voltage: The output voltage can be adjusted from 0.6V to the input voltage (VIN), providing flexibility in powering different components.

Advantages and Disadvantages

Advantages: - High efficiency power conversion - Low quiescent current for reduced power consumption - Wide input voltage range for versatility - Small package size for space-constrained designs

Disadvantages: - Limited maximum output current (600mA) - Higher switching frequency may require careful PCB layout design

Working Principles

The LTC3446IDE#PBF operates as a synchronous buck regulator, converting the input voltage to a lower output voltage with high efficiency. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The feedback voltage (FB) pin is used to set the desired output voltage, while the enable (EN) pin allows for on/off control of the regulator.

When enabled, the LTC3446IDE#PBF switches the internal power MOSFETs at a high frequency, delivering energy from the input to the output through an inductor. The output voltage is regulated by adjusting the duty cycle of the switching waveform based on the feedback voltage.

Detailed Application Field Plans

The LTC3446IDE#PBF is commonly used in various battery-powered portable devices, such as smartphones, tablets, portable media players, and wearable devices. It provides efficient power management solutions for these devices, ensuring optimal performance and extended battery life.

Additionally, the LTC3446IDE#PBF can be utilized in other low-power applications that require a compact and efficient power supply solution. These include IoT devices, wireless sensors, handheld instruments, and other battery-operated systems.

Detailed and Complete Alternative Models

1. LTC3446EDE#PBF: Similar to LTC3446IDE#PBF, but available in a DFN-12 package.
2. LTC3446HDE#PBF: Higher maximum output current (800mA) variant of LTC3446IDE#PBF.
3. LTC3446IDE-1#PBF: Adjustable output voltage range from 0.6V to 1.8V.

These alternative models offer similar functionality and characteristics, providing options for different design requirements.

In conclusion, the LTC3446IDE#PBF is a high-efficiency synchronous buck regulator that offers low quiescent current and a wide input voltage range. Its small package size makes it suitable for space-constrained designs. With its adjustable output voltage and various alternative models, it finds applications in battery-powered portable devices, IoT systems, and other low-power applications.