Microchip Technology TC1303B-ZP0EMFTR

Overview

TC1303B-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 specifically of the LDO output. It delivers 1.8 V at 500 mA (VOUT1) and 3.3 V at 300 mA (VOUT2), operates from 2.7–5.5 V input, and features 65 µA typical quiescent current and 2.0 MHz fixed-frequency PWM switching. It is designed for portable battery-powered systems requiring tightly regulated dual-rail supplies.

For engineers reviewing the TC1303B-ZP0EMFTR datasheet, TC1303B-ZP0EMFTR pinout, TC1303B-ZP0EMFTR application, or TC1303B-ZP0EMFTR equivalent, key selection criteria include LDO-monitored PG functionality, independent shutdown control per rail, 137 mV typical dropout at 200 mA on VOUT2, internal compensation, and operation across –40°C to +125°C junction temperature.

Technical Context

The TC1303B-ZP0EMFTR implements a synchronous buck converter with automatic transition between PWM (heavy load) and PFM (light load) modes to maintain high efficiency (>90% typical) and ultra-low quiescent current. Its feedback reference is 0.8 V ±2.5%, enabling adjustable outputs from 0.8 V to 4.5 V or standard fixed voltages including 1.8 V and 3.3 V.

The integrated 300 mA LDO uses a single 1 µF ceramic output capacitor, exhibits 25 ppm/°C temperature coefficient, and provides 62 dB PSRR at ≤100 Hz. Its power-good output is push-pull (not open-drain), active when VOUT2 reaches ≥94% of regulation, with 300 ms delay used for processor reset sequencing.

Key Specifications

Pinout & Package

TC1303B-ZP0EMFTR is housed in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), optimized for space-constrained portable designs. The package supports high thermal performance (θ_JA = 41°C/W on 4-layer board) and requires EP connection to AGND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP16311-H/MS and TPS65023RGZR, TC1303B-ZP0EMFTR offers integrated LDO+PG in a minimal 10-pin DFN, eliminating external components while maintaining independent rail control - ideal for cost- and space-sensitive dual-rail portable designs where I²C is unnecessary.

Availability

TC1303B-ZP0EMFTR is available at Aetrix Electronics and suitable for portable medical sensors, USB-powered test equipment, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TC1303B-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 microcontrollers, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.

The TC1303 family is engineered for ultra-low-power dual-rail power management in space-constrained portable electronics, emphasizing integration, efficiency, and ease of use without sacrificing thermal or electrical performance.

FAQ

What output voltages does the TC1303B-ZP0EMFTR provide?

The TC1303B-ZP0EMFTR provides two fixed output voltages: VOUT1 = 1.8 V at up to 500 mA (buck regulator) and VOUT2 = 3.3 V at up to 300 mA (LDO). These values are factory-set and do not require external resistors. The part number suffix "ZP0" confirms this specific dual-voltage configuration, and the device uses internal feedback networks to maintain ±0.3% output tolerance over load and temperature.

How does the power-good (PG) function work on the TC1303B-ZP0EMFTR?

The TC1303B-ZP0EMFTR's PG pin is a push-pull output that monitors only the LDO output (VOUT2). It asserts high when VOUT2 reaches ≥94% of its nominal 3.3 V value and remains asserted for a minimum 300 ms delay after stabilization. This behavior is unique to the TC1303B variant - unlike TC1303A (monitors buck) or TC1303C (monitors both), making TC1303B-ZP0EMFTR ideal for systems where LDO rail integrity is critical for reset timing.

Can the TC1303B-ZP0EMFTR operate from a single-cell Li-ion battery?

Yes, the TC1303B-ZP0EMFTR operates from 2.7 V to 5.5 V, fully supporting single-cell Li-ion batteries (nominal 3.7 V, discharge range ~3.0–4.2 V). Its 2.55 V UVLO threshold ensures startup above battery cutoff, and the 137 mV LDO dropout allows VOUT2 to remain regulated even at end-of-discharge (e.g., 3.3 V output from 3.437 V input at 200 mA). The buck regulator maintains >85% efficiency across the full input range.

What is the thermal performance of the TC1303B-ZP0EMFTR in its DFN package?

The TC1303B-ZP0EMFTR in the 10-pin 3×3 mm DFN package achieves θ_JA = 41°C/W on a standard 4-layer PCB with internal ground plane and two thermal vias under the exposed pad. This allows continuous 500 mA buck + 300 mA LDO operation at ambient temperatures up to +85°C without derating, provided the EP is soldered to AGND. Thermal shutdown activates at 165°C with 10°C hysteresis to prevent damage during transient overloads.

Does the TC1303B-ZP0EMFTR require external compensation components?

No, the TC1303B-ZP0EMFTR features internally compensated control loops for both the buck regulator and LDO. This eliminates the need for external compensation capacitors or resistors, reducing bill-of-materials cost and PCB footprint. The design is validated for stability with standard 4.7 µH inductors and 4.7 µF input / 1 µF LDO output ceramic capacitors, as shown in Microchip's DS21949C-page 5 application circuits.