Microchip Technology TC1304-ZS0EMFTR

Overview

TC1304-ZS0EMFTR 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 sequenced startup/shutdown, 300 ms power-good delay, and total quiescent current of 70.1 µA typical. It operates from 2.7–5.5 V input, delivers adjustable or fixed outputs (e.g., 0.8–4.5 V on VOUT1, 1.5–3.3 V on VOUT2), and targets battery-powered portable electronics requiring precise voltage sequencing.

For engineers reviewing the TC1304-ZS0EMFTR datasheet, TC1304-ZS0EMFTR pinout, TC1304-ZS0EMFTR application, or TC1304-ZS0EMFTR equivalent, key selection criteria include output sequencing control, dual-rail regulation tolerance (±0.3%), 137 mV LDO dropout at 200 mA, 2.0 MHz fixed-frequency PWM operation, and open-drain PG output with 94% VOUT threshold monitoring both regulators.

Technical Context

The TC1304-ZS0EMFTR implements independent shutdown logic with a single SHDN pin that initiates controlled sequencing-LDO enables first, then buck regulator on startup; reverse order on shutdown. Its buck stage uses internal P/N-channel MOSFETs (R_DS(on) = 450 mΩ each) and transitions automatically between PWM and PFM modes to maintain efficiency across load ranges.

The LDO stage is internally compensated, requires only a 1 µF ceramic output capacitor, and features ±0.3% output voltage tolerance over temperature. Power-good generation monitors both VOUT1 and VOUT2 simultaneously with 2% hysteresis and 300 ms active timeout, supporting processor reset timing in embedded systems.

Key Specifications

Pinout & Package

TC1304-ZS0EMFTR is housed in a 10-lead 3×3 mm DFN package with exposed thermal pad (EP), optimized for high-power-density portable designs. Pin numbering follows standard DFN orientation (pin 1 top-left, counterclockwise).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TC1303C-ZS0EMFTR and TPS65023RSBR, TC1304-ZS0EMFTR uniquely integrates hardware-enforced sequencing in a compact 3×3 mm DFN, reducing firmware dependencies and PCB area while maintaining ultra-low quiescent current essential for battery longevity.

Availability

TC1304-ZS0EMFTR is available at Aetrix Electronics and suitable for wearable health monitors, USB-C powered hubs, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TC1304-ZS0EMFTR 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a focus on reliability, low-power design, and long-term product availability.

The TC1303/TC1304 product line was engineered for space-constrained, battery-powered portable electronics needing dual-rail regulation with sequencing, low IQ, and robust protection-targeting cellular phones, PDAs, and medical handhelds.

FAQ

What output voltages does the TC1304-ZS0EMFTR provide?

The TC1304-ZS0EMFTR provides two fixed output voltages: VOUT1 = 1.2 V (core supply) and VOUT2 = 3.3 V (I/O or peripheral supply), as indicated by the "ZS0" suffix per Microchip's naming convention. Both outputs maintain ±0.3% regulation over load, line, and temperature, with the buck stage adjustable via external resistors only in non-ZS variants.

How does the power-good (PG) function operate on the TC1304-ZS0EMFTR?

The TC1304-ZS0EMFTR's PG pin is an open-drain output that asserts low only when both VOUT1 and VOUT2 are within 94% of their nominal values, with 2% hysteresis and a 300 ms active timeout period. This dual-rail monitoring ensures system reset occurs only after full power stabilization, critical for processors requiring simultaneous rail validation.

Does the TC1304-ZS0EMFTR support independent shutdown of its buck and LDO outputs?

No-the TC1304-ZS0EMFTR uses a single SHDN pin to initiate hardware-controlled sequencing: LDO enables first and disables last, while the buck regulator enables second and disables first. Independent control is provided only in the TC1303 family (e.g., TC1303C-ZS0EMFTR), which has separate SHDN1 and SHDN2 inputs.

What is the thermal performance of the TC1304-ZS0EMFTR in its DFN package?

The TC1304-ZS0EMFTR in the 10-lead 3×3 mm DFN package achieves a typical junction-to-ambient thermal resistance (θ_JA) of 41°C/W on a 4-layer PCB with internal ground plane and ≥2 thermal vias under the exposed pad. This enables continuous 500 mA buck output at ambient temperatures up to +85°C without derating when properly heatsinked.

Can the TC1304-ZS0EMFTR operate from a single 3.7 V Li-ion battery throughout its discharge curve?

Yes-the TC1304-ZS0EMFTR supports input voltages from 2.7 V to 5.5 V, covering the full Li-ion discharge range (4.2 V → 2.7 V). Its 137 mV LDO dropout at 200 mA ensures the 3.3 V rail remains regulated down to VIN = 3.437 V, and UVLO (2.55 V typical) prevents operation below safe flash memory retention voltage.