Microchip Technology TC1303C-ZP0EMFTR

Overview

TC1303C-ZP0EMFTR from Microchip Technology is a dual-output power management IC integrating a 500 mA synchronous buck regulator and a 300 mA low-dropout linear regulator (LDO), with power-good monitoring of both outputs. It delivers 1.8 V @ 500 mA (buck) and 3.3 V @ 300 mA (LDO) from a 2.7–5.5 V input, features 65 µA typical quiescent current, 2.0 MHz fixed-frequency PWM operation, and operates across –40°C to +125°C junction temperature for portable medical instruments and USB-powered devices.

For engineers reviewing the TC1303C-ZP0EMFTR datasheet, TC1303C-ZP0EMFTR pinout, TC1303C-ZP0EMFTR application, or TC1303C-ZP0EMFTR equivalent, key selection criteria include independent shutdown control per output, 300 ms power-good delay for processor reset, 137 mV LDO dropout at 200 mA, internal compensation eliminating external loop components, and compatibility with 1 µF ceramic output capacitors on both rails.

Technical Context

The TC1303C-ZP0EMFTR implements a synchronous buck stage with PFM/PWM auto-transition and an independently controlled LDO stage, both internally compensated. Its power-good circuit monitors regulation status of *both* VOUT1 and VOUT2 simultaneously - a distinguishing feature versus TC1303A (buck-only monitoring) and TC1303B (LDO-only monitoring).

It uses separate shutdown inputs (SHDN1 for buck, SHDN2 for LDO), enabling flexible sequencing during startup/shutdown. The device integrates undervoltage lockout (2.55 V nominal), overtemperature protection (165°C trip), and short-circuit protection on both outputs, with thermal resistance of 41°C/W in the 10-lead DFN package.

Key Specifications

Pinout & Package

TC1303C-ZP0EMFTR is housed in a 10-lead 3×3 mm DFN package with exposed thermal pad (EP), optimized for high thermal conductivity and space-constrained PCB layouts. Pin 11 (EP) must be soldered to AGND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output PMIC applications.

Compared with TC1303B-ZP0EMFTR and TPS62231DRYT, TC1303C-ZP0EMFTR uniquely guarantees simultaneous validation of *both* output rails before releasing reset - essential for safety-critical or mixed-voltage SoC platforms where uncoordinated rail sequencing risks latch-up or data corruption.

Availability

TC1303C-ZP0EMFTR is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered test equipment, and industrial handheld terminals requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TC1303C-ZP0EMFTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a leading provider of microcontroller, analog, and Flash-IP solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and development tools.

The TC1303 family was designed specifically for space- and power-constrained portable electronics needing tightly coupled dual-rail power with minimal external components and robust fault protection.

FAQ

What output voltages does the TC1303C-ZP0EMFTR provide?

The TC1303C-ZP0EMFTR delivers a fixed 1.8 V output from its synchronous buck regulator (VOUT1) and a fixed 3.3 V output from its low-dropout linear regulator (VOUT2). These values are factory-programmed and confirmed by the "ZP0" suffix in the part number - no external resistors are required for voltage setting, and both outputs are internally compensated for stability with standard 1 µF ceramic capacitors.

How does the power-good (PG) function operate in TC1303C-ZP0EMFTR?

The TC1303C-ZP0EMFTR's PG pin is an open-drain output that asserts low only when *both* VOUT1 and VOUT2 are within ±6% of their nominal values (1.8 V and 3.3 V). It incorporates a 300 ms active timeout period after valid regulation is detected, making it ideal for coordinating processor reset timing. This dual-rail monitoring distinguishes TC1303C-ZP0EMFTR from TC1303A (buck-only) and TC1303B (LDO-only) variants.

Can TC1303C-ZP0EMFTR support independent power sequencing of its two outputs?

Yes - TC1303C-ZP0EMFTR provides separate shutdown inputs: SHDN1 controls the buck regulator and SHDN2 controls the LDO. This allows full sequencing flexibility, such as powering up the LDO first to initialize I/O peripherals before enabling the 1.8 V core rail, or shutting down the buck while maintaining LDO output for real-time clock or memory retention functions.

What is the thermal performance of TC1303C-ZP0EMFTR in its DFN package?

TC1303C-ZP0EMFTR in the 10-lead 3×3 mm DFN package has a typical junction-to-ambient thermal resistance (θJA) of 41°C/W on a 4-layer PCB with internal ground plane and two thermal vias under the exposed pad. This enables continuous 500 mA buck + 300 mA LDO operation at ambient temperatures up to +85°C without forced airflow, provided the EP pad is soldered to AGND per Microchip layout guidelines.

Does TC1303C-ZP0EMFTR require external compensation components?

No - TC1303C-ZP0EMFTR features fully internal compensation for both the buck and LDO regulators. This eliminates the need for external RC networks or type-II/type-III compensators, reducing bill-of-materials cost and layout sensitivity. Stability is guaranteed across all operating conditions (–40°C to +125°C) using only the recommended 4.7 µH inductor and 4.7 µF/1 µF ceramic output capacitors.