TPS61045DRBR

Product Overview

Category

The TPS61045DRBR belongs to the category of integrated circuits (ICs) and specifically falls under the voltage regulators - switching regulators classification.

Use

This product is primarily used for boosting or stepping up voltage levels in various electronic applications. It is commonly employed in portable devices, such as smartphones, tablets, and digital cameras, where efficient power management is crucial.

Characteristics

• High efficiency: The TPS61045DRBR offers high conversion efficiency, ensuring minimal power loss during voltage conversion.
• Wide input voltage range: It can accept input voltages ranging from 2.5V to 12V, making it suitable for a wide range of applications.
• Adjustable output voltage: The output voltage can be adjusted within a specified range, providing flexibility for different system requirements.
• Low quiescent current: The device features low quiescent current consumption, contributing to overall power savings.
• Overcurrent protection: It incorporates overcurrent protection to safeguard against excessive current flow, enhancing system reliability.

Package and Quantity

The TPS61045DRBR is available in a small outline package (SOIC) with an exposed pad for improved thermal dissipation. It is supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 2.5V to 12V
• Output Voltage Range: Adjustable from 1.8V to 15V
• Maximum Output Current: 1A
• Switching Frequency: 1.2MHz
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TPS61045DRBR has the following pin configuration:

1. EN (Enable): Enable pin for turning the device on/off.
2. FB (Feedback): Feedback pin for adjusting the output voltage.
3. VIN (Input Voltage): Input voltage supply pin.
4. SW (Switch Node): Switch node connection for inductor and diode.
5. PGND (Power Ground): Power ground reference pin.
6. LX (Inductor Connection): Connection point for the inductor.
7. VOUT (Output Voltage): Output voltage supply pin.
8. AGND (Analog Ground): Analog ground reference pin.

Functional Features

• Wide Input Voltage Range: The TPS61045DRBR can efficiently boost input voltages ranging from 2.5V to 12V, allowing compatibility with various power sources.
• Adjustable Output Voltage: The device offers adjustable output voltage within a specified range, enabling customization based on specific application requirements.
• High Efficiency: With its high conversion efficiency, the TPS61045DRBR minimizes power loss during voltage conversion, maximizing overall system efficiency.
• Overcurrent Protection: The integrated overcurrent protection feature safeguards against excessive current flow, protecting both the device and the connected components.
• Thermal Dissipation: The exposed pad package design enhances thermal dissipation, ensuring optimal performance even under demanding operating conditions.

Advantages and Disadvantages

Advantages

• High conversion efficiency leads to reduced power consumption and longer battery life.
• Wide input voltage range allows for versatile application scenarios.
• Adjustable output voltage provides flexibility for different system requirements.
• Overcurrent protection enhances system reliability and protects against damage.
• Exposed pad package design improves thermal dissipation, ensuring stable operation.

Disadvantages

• Limited maximum output current of 1A may not be suitable for high-power applications.
• The device requires external components, such as an inductor and diode, which adds complexity to the circuit design.

Working Principles

The TPS61045DRBR operates as a boost converter, utilizing a switching regulator topology. It converts the input voltage to a higher output voltage by controlling the duty cycle of an internal power switch. The device employs pulse width modulation (PWM) techniques to regulate the output voltage accurately.

When enabled, the TPS61045DRBR starts switching at a fixed frequency, typically 1.2MHz. The input voltage is applied to the inductor through the SW pin, and energy is stored in the inductor during the on-time of the internal switch. During the off-time, the energy stored in the inductor is transferred to the output capacitor and load.

The feedback pin (FB) monitors the output voltage and adjusts the duty cycle accordingly to maintain the desired output voltage level. The device also incorporates overcurrent protection, which limits the current flow to prevent damage to the circuit.

Detailed Application Field Plans

The TPS61045DRBR finds extensive application in various portable electronic devices, including:

1. Smartphones: The device can be used to boost the battery voltage to power the display, camera modules, and other components.
2. Tablets: It enables efficient power management for