TC1303B-DG0EMF

Overview

The TC1303B-DG0EMF is a dual-output power management integrated circuit manufactured by Microchip Technology. It integrates a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) linear regulator within a single 10-lead DFN package measuring 3 mm x 3 mm. The device operates with an input voltage range of 2.7 V to 5.5 V. The buck converter utilizes a fixed 2.0 MHz switching frequency and supports adjustable output voltages from 0.8 V to 4.5 V, or standard fixed outputs including 1.5 V. The LDO provides a fixed 3.3 V output. Total quiescent current is typically 65 µA.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a low-noise LDO in a compact footprint
• Features automatic transition between PWM and PFM modes to optimize efficiency across load conditions
• Includes a dedicated power-good output signal with a configurable delay for system monitoring
• Supports independent shutdown control for both the buck and LDO outputs to minimize standby consumption

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices utilizing lithium-ion or lithium-polymer cells
• Embedded systems needing simultaneous digital logic and analog supply rails
• IoT modules with strict size constraints and low power requirements

Procurement Notes

Verify the specific suffix DG0 against the official Microchip datasheet to confirm the exact output voltage configuration. Ensure the ordering part number matches the required tape-and-reel or tube packaging format. Confirm RoHS compliance status and moisture sensitivity level prior to procurement to meet assembly standards.

Selection Notes

Select this component when space-constrained designs require combined switching and linear regulation capabilities. The internal compensation simplifies external component selection compared to discrete solutions. Consider the 2.0 MHz switching frequency for smaller passive components while evaluating thermal performance under maximum load conditions.

Part Context

This device belongs to the TC1303 family of dual-output regulators. Variants within the series differ primarily in fixed output voltage combinations and package options. The TC1303B specifically denotes the version with defined electrical characteristics for the buck and LDO sections, distinct from the TC1303A or TC1303C models.

Replacement Considerations

TC1303B-SA0EMFTR is listed as a direct substitute option.