Microchip Technology TC1304-ZA0EMF

Overview

TC1304-ZA0EMF 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 across -40°C to +125°C and supports input voltages from 2.7 V to 5.5 V - ideal for portable medical instruments requiring tightly coordinated voltage rails.

For engineers reviewing the TC1304-ZA0EMF datasheet, TC1304-ZA0EMF pinout, TC1304-ZA0EMF application, or TC1304-ZA0EMF equivalent, key selection criteria include output sequencing capability, dual-rail monitoring via open-drain PG, LDO dropout of 137 mV @ 200 mA, buck efficiency >90% at 2.0 MHz, and compatibility with 1 µF ceramic output capacitors on both rails.

Technical Context

The TC1304-ZA0EMF implements independent control logic for buck and LDO outputs with hardware-enforced sequencing: LDO enables first, followed by buck regulator during startup; reverse order during shutdown. Its power-good circuit monitors both outputs simultaneously and asserts an open-drain signal only after both VOUT1 and VOUT2 stabilize within ±6% of nominal for ≥300 ms.

Buck regulation uses fixed-frequency 2.0 MHz PWM under heavy load and automatically transitions to PFM mode at light loads to maintain ultra-low IQ. The LDO employs internal compensation and requires no external components beyond a single 1 µF ceramic capacitor, achieving ±0.3% output voltage tolerance and 62 dB PSRR at ≤100 Hz.

Key Specifications

Pinout & Package

TC1304-ZA0EMF is packaged in a 10-pin 3×3 mm DFN with exposed thermal pad (EP), optimized for thermal performance and board area reduction in handheld devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TC1303C-ZA0EMF and TPS65023RGTR, TC1304-ZA0EMF uniquely delivers deterministic hardware sequencing in the smallest 10-pin DFN package while maintaining the lowest IQ among Microchip's dual-rail PMICs - making it optimal for size- and battery-life-critical portable medical designs.

Availability

TC1304-ZA0EMF is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered diagnostics, and handheld clinical scanners requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for TC1304-ZA0EMF 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 microcontrollers, analog components, and power management ICs, with a focus on reliability, low-power design, and embedded control solutions.

The TC1303/TC1304 product line was engineered specifically for space-constrained portable electronics requiring dual, independently managed power rails - emphasizing ultra-low quiescent current, integrated protection, and minimal external component count.

FAQ

What output voltages does the TC1304-ZA0EMF provide?

The TC1304-ZA0EMF delivers a fixed 1.8 V buck output (VOUT1) and a fixed 2.5 V LDO output (VOUT2), as indicated by the "ZA0" suffix in the part number. Both outputs are factory-trimmed to ±0.3% tolerance across -40°C to +85°C ambient, with no external resistor network required for adjustment. This configuration is validated in the DS21949C datasheet for the ZA0 variant.

How does the power-good (PG) function operate in TC1304-ZA0EMF?

In TC1304-ZA0EMF, the PG pin is an open-drain output that remains high-impedance until both VOUT1 and VOUT2 reach and sustain ≥94% of their nominal values for ≥300 ms. It then pulls low to signal valid regulation - a behavior confirmed in the Functional Block Diagram (DS21949C-page 4) and Electrical Characteristics table (DS21949C-page 9). This dual-rail monitoring ensures safe processor boot sequencing.

Does TC1304-ZA0EMF require external compensation components?

No - TC1304-ZA0EMF features fully internal compensation for both the buck regulator and LDO, as stated in the Features section (DS21949C-page 1). This eliminates external compensation capacitors or resistors, reducing bill-of-materials count and layout sensitivity while maintaining stability with only a 1 µF ceramic capacitor on VOUT2 and standard 4.7 µF caps on VOUT1 and input.

What is the thermal performance of TC1304-ZA0EMF in its DFN package?

TC1304-ZA0EMF 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 (DS21949C-page 10). At full 500 mA buck + 300 mA LDO load, this enables operation up to +125°C junction temperature with appropriate copper area and airflow - verified in thermal characterization curves (DS21949C-page 14).

Can TC1304-ZA0EMF operate from a single 3.7 V Li-ion cell?

Yes - TC1304-ZA0EMF supports input voltages from 2.7 V to 5.5 V (DS21949C-page 7), fully covering the discharge range of a standard Li-ion cell (3.0 V–4.2 V). Its 137 mV LDO dropout at 200 mA and 280 mV buck dropout at 500 mA ensure stable 1.8 V and 2.5 V outputs even at end-of-discharge, with no brownout risk down to 2.7 V input.