TC1313-RD1EMFTR

Overview

The TC1313-RD1EMFTR is a dual-output power management IC from Microchip Technology, integrating a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) linear regulator. It operates within an input voltage range of 2.7 V to 5.5 V, with a typical quiescent current of 57 µA. The device features independent shutdown controls for both outputs and internally compensated loops. The buck converter supports fixed-frequency PWM at 2.0 MHz under heavy loads and transitions to PFM mode for efficiency. The LDO provides a fixed output of 3 V, while the buck output is fixed at 1.6 V in this specific variant.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a low-noise LDO in a single compact package.
• Features independent shutdown control pins allowing separate management of the buck and LDO outputs.
• Supports automatic transition between PWM and PFM modes to optimize efficiency across varying load conditions.
• Includes internal compensation for both regulators, simplifying external component requirements.

Applications

• Portable consumer electronics requiring multiple stable voltage rails
• Battery-powered devices needing efficient power conversion and low standby current
• Embedded systems utilizing microcontrollers with distinct logic and analog supply requirements

Procurement Notes

Verify the exact suffix EMFTR indicates tape-and-reel packaging when ordering. Confirm that the RD1 suffix corresponds to the specific 1.6 V buck and 3 V LDO configuration. Ensure compatibility with RoHS standards if required by your manufacturing process. Check lead times as they may vary based on production schedules. Validate that the DFN-10 package dimensions fit your PCB layout constraints.

Selection Notes

Select this part when a design requires two regulated outputs from a single source without external feedback networks. The fixed 1.6 V and 3 V outputs suit applications where these specific voltages are standard. Consider the 57 µA quiescent current for battery life optimization. The synchronous buck topology offers higher efficiency compared to traditional linear solutions for the main rail.

Part Context

This component belongs to the TC1313 family of dual-output regulators designed for space-constrained portable applications. It combines switching and linear regulation technologies to provide versatile power solutions. The DFN-10 package allows for compact board designs while maintaining thermal performance suitable for moderate power levels.

Replacement Considerations

Direct substitutes include other TC1313 variants with different output voltage configurations, such as TC1313-IP1EMFTR or TC1313-OS3EMFTR, provided the voltage requirements match. Verify pinout compatibility and thermal characteristics before substitution.

FAQ

What is the fixed output voltage of the LDO section in the TC1313-RD1EMFTR?

The LDO section provides a fixed output voltage of 3 V.

Does the TC1313-RD1EMFTR support adjustable output voltages?

No, the RD1 suffix indicates fixed output voltages of 1.6 V for the buck regulator and 3 V for the LDO. Adjustable versions use different suffixes.

How does the buck regulator handle light loads?

The buck regulator automatically transitions from PWM mode to PFM mode under light load conditions to improve efficiency.