Microchip Technology TC1304-ZA0EMFTR

Overview

TC1304-ZA0EMFTR 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 independent sequencing control, 300 ms power-good delay, 65 µA typical quiescent current, and operation from -40°C to +125°C. It delivers core and bias voltages for portable processors in USB-powered devices and handheld medical instruments.

For engineers reviewing the TC1304-ZA0EMFTR datasheet, TC1304-ZA0EMFTR pinout, TC1304-ZA0EMFTR application, or TC1304-ZA0EMFTR equivalent, key selection criteria include sequenced startup/shutdown behavior, dual-output monitoring via open-drain PG, 2.0 MHz fixed-frequency PWM with automatic PFM transition, and compatibility with 1 µF LDO output capacitance.

Technical Context

The TC1304-ZA0EMFTR implements independent enable sequencing: SHDN assertion initiates controlled shutdown of VOUT2 before VOUT1, while release triggers VOUT2 ramp-up prior to VOUT1. Its buck stage uses internal N- and P-channel MOSFETs (R_DS(on) = 450 mΩ each) and operates at 2.0 MHz ±20% across input voltage and temperature.

The LDO stage features 137 mV typical dropout at 200 mA, 25 ppm/°C output voltage tempco, and 62 dB PSRR at ≤100 Hz. Power-good logic monitors both outputs simultaneously with 94% high-threshold and 89% low-threshold hysteresis, generating an open-drain signal with 262 ms nominal active timeout.

Key Specifications

Pinout & Package

TC1304-ZA0EMFTR is housed in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), optimized for thermal performance in space-constrained portable designs. 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 TC1303C-ZA0EMFTR and TPS65023RGTR, TC1304-ZA0EMFTR uniquely delivers verified, hardware-enforced sequencing between its two outputs-critical for preventing latch-up in mixed-signal SoCs-while maintaining lowest system IQ and minimal external component count.

Availability

TC1304-ZA0EMFTR is available at Aetrix Electronics and suitable for USB-powered portable instruments, handheld medical devices, industrial edge sensor nodes, and ultra-low-power IoT trackers requiring stable component supply across extended product lifecycles.

Supply support for TC1304-ZA0EMFTR 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, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.

The TC1303/TC1304 family was designed specifically for space- and power-constrained portable electronics needing tightly regulated dual supplies with intelligent power sequencing and ultra-low quiescent current.

FAQ

What output voltages does the TC1304-ZA0EMFTR provide?

The TC1304-ZA0EMFTR provides a fixed 3.3 V output from its synchronous buck regulator and a fixed 1.5 V output from its low-dropout linear regulator. These values are factory-set for the ZA0 variant and require no external feedback resistors. Both outputs are monitored by the integrated power-good function, which asserts only when both rails are within 94% of their nominal values.

How does the TC1304-ZA0EMFTR implement power sequencing?

The TC1304-ZA0EMFTR implements hardware-based sequencing via its single SHDN pin: upon de-assertion, VOUT2 (1.5 V LDO) ramps up first, followed by VOUT1 (3.3 V buck) after a controlled delay; upon assertion, VOUT2 shuts down before VOUT1. This eliminates need for external timers or GPIO coordination, ensuring deterministic behavior across temperature and voltage.

What is the minimum input voltage required for the TC1304-ZA0EMFTR to regulate both outputs?

The TC1304-ZA0EMFTR requires a minimum input voltage of 2.7 V, but actual functional minimum depends on output configurations: for 3.3 V buck output, VIN must exceed 3.3 V + 280 mV (dropout) = 3.58 V; for 1.5 V LDO output, VIN must exceed 1.5 V + 137 mV = 1.637 V. Therefore, 3.58 V is the binding constraint to maintain regulation on both rails simultaneously.

Can the TC1304-ZA0EMFTR operate from a single 3.6 V Li-ion cell throughout its discharge curve?

Yes-the TC1304-ZA0EMFTR operates across 2.7 V to 5.5 V input, fully covering the 3.6 V nominal to 2.7 V cutoff range of a discharged Li-ion cell. At 2.7 V input, the 3.3 V buck output remains functional (with reduced headroom), while the 1.5 V LDO maintains regulation with 137 mV dropout-ensuring uninterrupted operation down to end-of-life battery voltage.

What thermal performance can be expected from the TC1304-ZA0EMFTR in a 10-pin DFN package?

In a standard 4-layer PCB with internal ground plane and two thermal vias under the exposed pad, the TC1304-ZA0EMFTR achieves θ_JA = 41°C/W. At full 500 mA buck + 300 mA LDO load with 3.6 V input, worst-case power dissipation is ~450 mW, resulting in ~18.5°C rise above ambient-well within the -40°C to +125°C junction limit even at 105°C ambient.