TPS61221DCKT

Product Overview

Category

The TPS61221DCKT belongs to the category of integrated circuits (ICs) and specifically falls under the voltage regulators - switching regulators family.

Use

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

Characteristics

• High efficiency: The TPS61221DCKT offers high conversion efficiency, ensuring minimal power loss during voltage conversion.
• Wide input voltage range: It can accept input voltages ranging from 0.3V to 5.5V, making it suitable for a wide range of power sources.
• Adjustable output voltage: The output voltage can be adjusted within a range of 1.8V to 5.5V, providing flexibility for different application requirements.
• Low quiescent current: The device features low quiescent current consumption, contributing to extended battery life in portable devices.
• Small package size: The TPS61221DCKT comes in a compact SOT-23 package, enabling space-saving designs.

Package and Quantity

The TPS61221DCKT is available in a surface-mount SOT-23 package. It is typically sold in reels containing 3000 units per reel.

Specifications

• Input Voltage Range: 0.3V to 5.5V
• Output Voltage Range: 1.8V to 5.5V
• Maximum Output Current: 500mA
• Switching Frequency: 1.2MHz
• Quiescent Current: 17µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TPS61221DCKT has six pins arranged as follows:

___________ | | EN |1 6| PG VIN|2 5| VOUT GND|3 4| FB |___________|

1. EN: Enable pin - Controls the device's operation.
2. VIN: Input voltage pin - Connects to the power source.
3. GND: Ground pin - Connected to the common ground reference.
4. FB: Feedback pin - Used for adjusting the output voltage.
5. VOUT: Output voltage pin - Provides the boosted voltage.
6. PG: Power good pin - Indicates the status of the output voltage.

Functional Features

• High Efficiency: The TPS61221DCKT utilizes a high-efficiency synchronous rectifier to minimize power loss during voltage conversion.
• Automatic PFM/PWM Mode Switching: The device automatically switches between pulse frequency modulation (PFM) and pulse width modulation (PWM) modes based on the load, optimizing efficiency across different operating conditions.
• Soft Start: The soft start feature ensures a controlled and gradual increase in output voltage during startup, preventing excessive current draw.
• Overcurrent Protection: The TPS61221DCKT incorporates overcurrent protection to safeguard against excessive current flow, enhancing system reliability.
• Undervoltage Lockout: It includes an undervoltage lockout feature that disables the device when the input voltage falls below a specified threshold, preventing improper operation.

Advantages and Disadvantages

Advantages

• High conversion efficiency leads to reduced power loss.
• Wide input voltage range allows compatibility with various power sources.
• Adjustable output voltage provides flexibility for different applications.
• Low quiescent current extends battery life in portable devices.
• Compact package size enables space-saving designs.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• The SOT-23 package may pose challenges for manual soldering due to its small size.

Working Principles

The TPS61221DCKT operates as a step-up (boost) voltage regulator. It uses a synchronous rectifier and a control circuit to efficiently convert the input voltage to a higher output voltage. The device employs pulse frequency modulation (PFM) and pulse width modulation (PWM) modes to optimize efficiency based on the load requirements. By adjusting the feedback voltage, the output voltage can be precisely regulated within the specified range.

Detailed Application Field Plans

The TPS61221DCKT finds application in various portable electronic devices, including but not limited to: - Smartphones and tablets - Wearable devices (smartwatches, fitness trackers) - Portable medical devices - Wireless communication modules - Battery-powered IoT devices

Alternative Models

For those seeking alternative models with similar functionality, the following options are available: - TPS61220DCKR - TPS61222DCKR - TPS61223DCKR - TPS61224DCKR