TPS62240DDCR

Updated: 2026-09-11

Overview

The TPS62240DDCR is a synchronous step-down DC-DC converter manufactured by Texas Instruments. It is designed to provide efficient power conversion for low-power applications, such as portable electronics and embedded systems. The device operates over a wide input voltage range, typically from 2.5V to 6V, and delivers an output current of up to 300mA. Its compact SOT-23 package makes it suitable for space-constrained designs, while its high efficiency (up to 95%) helps extend battery life in portable devices. The TPS62240DDCR also features a fixed switching frequency of 2.25MHz, which simplifies filter design and reduces external component count.

Structure and Working Principle

The TPS62240DDCR integrates a synchronous buck converter topology, which includes a high-side and low-side MOSFET, control logic, and feedback circuitry. The device operates by switching the input voltage at a high frequency and filtering the output to provide a stable, lower voltage. During operation, the control logic adjusts the duty cycle of the high-side MOSFET to maintain the desired output voltage, even under varying load conditions. The low-side MOSFET acts as a synchronous rectifier, improving efficiency compared to traditional diode-based designs. The feedback loop ensures tight output voltage regulation, typically within ±1.5%.

Key Features

The TPS62240DDCR offers several key features that make it suitable for low-power applications. Its high efficiency (up to 95%) minimizes power loss and extends battery life in portable devices. The wide input voltage range (2.5V to 6V) allows it to be used with various power sources, including single-cell Li-ion batteries and 3.3V/5V rails. The device also includes built-in protection features such as thermal shutdown and overcurrent protection, enhancing reliability in demanding environments. Its fixed switching frequency of 2.25MHz reduces electromagnetic interference (EMI) and simplifies PCB layout. Additionally, the TPS62240DDCR requires minimal external components, reducing overall system cost and board space.

Application Areas

The TPS62240DDCR is commonly used in portable and battery-powered applications where space and efficiency are critical. It is ideal for powering sensors, microcontrollers, and wireless modules in IoT devices, wearables, and handheld instruments. Other applications include embedded systems, such as industrial control modules and consumer electronics, where stable and efficient power conversion is required. The device's small footprint and low external component count make it particularly suitable for compact designs. Its ability to operate over a wide input voltage range also makes it versatile for use in various power supply configurations.

Maintenance and Precautions

To ensure optimal performance and longevity of the TPS62240DDCR, proper thermal management is essential. Although the device includes thermal shutdown protection, excessive heat can degrade performance. Ensure adequate PCB copper area for heat dissipation and avoid operating near the maximum junction temperature. When designing with the TPS62240DDCR, pay attention to input and output capacitor selection, as these components affect stability and ripple performance. Follow the manufacturer's layout guidelines to minimize noise and EMI. Avoid exceeding the maximum input voltage or output current ratings, as this can damage the device. Always verify the output voltage under load to ensure proper regulation.

B2B Procurement Guide

When procuring the TPS62240DDCR in bulk, consider factors such as lead time, pricing tiers, and supplier reliability. Texas Instruments and authorized distributors are the primary sources for genuine parts. Pricing typically ranges from $0.50 to $1.50 per unit, depending on order quantity. For large-volume orders, negotiate with suppliers for better pricing or explore alternative packaging options (e.g., tape and reel). Verify the manufacturer's part number and package type (SOT-23-5) to avoid compatibility issues. Additionally, check for counterfeit parts by sourcing from reputable distributors and requesting certificates of authenticity. Lead times can vary, so plan procurement accordingly to avoid project delays.