Microchip Technology TC1303C-ZP0EMF

Overview

TC1303C-ZP0EMF 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 2.0 MHz fixed-frequency PWM operation, 65 µA typical quiescent current, and operates across –40°C to +125°C junction temperature - used in portable medical instruments and USB-powered devices.

For engineers reviewing the TC1303C-ZP0EMF datasheet, TC1303C-ZP0EMF pinout, TC1303C-ZP0EMF application, or TC1303C-ZP0EMF equivalent, key selection criteria include independent shutdown control for each regulator, simultaneous PG monitoring of both outputs, 137 mV LDO dropout at 200 mA, internal compensation, and compatibility with 3×3 mm DFN-10 packaging.

Technical Context

The TC1303C-ZP0EMF implements a synchronous buck stage with PFM/PWM auto-transition and an independently controlled LDO stage, both internally compensated and sharing a common analog ground (AGND) reference. Its power-good circuit monitors regulation status of both VOUT1 and VOUT2 with a 300 ms delay, enabling reliable processor reset sequencing.

It uses separate shutdown inputs (SHDN1 for buck, SHDN2 for LDO), supports adjustable (0.8–4.5 V) or fixed-output configurations for VOUT1, and offers standard fixed LDO outputs (1.5 V, 1.8 V, 2.5 V, 3.3 V). Thermal shutdown triggers at 165°C with 10°C hysteresis, and undervoltage lockout activates below 2.4 V on VIN.

Key Specifications

Pinout & Package

TC1303C-ZP0EMF is housed in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), optimized for high-density 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 MCP16311-H/MS and TPS65023RSBR, TC1303C-ZP0EMF uniquely combines independent shutdown, true dual-output PG assertion, and ultra-low 65 µA quiescent current in a 3×3 mm DFN - making it optimal for space-constrained, battery-sensitive dual-rail applications where rail coordination is critical.

Availability

TC1303C-ZP0EMF is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered test equipment, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature extremes.

Supply support for TC1303C-ZP0EMF 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 mixed-signal semiconductor solutions, emphasizing reliability, longevity, and broad ecosystem support for embedded applications.

The TC1303 family was designed specifically for portable and battery-operated systems needing compact, efficient dual-voltage regulation with intelligent power supervision - targeting cellular phones, PDAs, and handheld instrumentation.

FAQ

What output voltages does the TC1303C-ZP0EMF provide?

The TC1303C-ZP0EMF 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), as indicated by the "ZP0" suffix in the part number per Microchip's ordering guide. Both outputs are factory-trimmed to ±0.3% tolerance and internally compensated - no external resistors or compensation networks are required for these configurations.

How does the power-good (PG) function operate on the TC1303C-ZP0EMF?

The TC1303C-ZP0EMF's PG pin is an open-drain output that asserts low only after both VOUT1 and VOUT2 reach and sustain ≥94% of their nominal values for 300 ms. This dual-rail monitoring - unique to TC1303C and TC1304 variants - ensures system reset is withheld until all critical supplies are fully stabilized, preventing premature firmware execution in multi-rail devices.

Can the TC1303C-ZP0EMF support independent enable/disable of its two regulators?

Yes, the TC1303C-ZP0EMF provides fully independent control via SHDN1 (buck) and SHDN2 (LDO). Driving SHDN1 low disables only the buck regulator while leaving the LDO active, and vice versa. This enables flexible power sequencing - for example, powering the LDO first to initialize peripherals before enabling the core rail - without requiring external logic or timing circuits.

What package type and thermal characteristics apply to the TC1303C-ZP0EMF?

The TC1303C-ZP0EMF uses a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), rated for θJA = 41°C/W on a 4-layer board with internal ground plane and thermal vias. Its operating junction temperature spans –40°C to +125°C, and thermal shutdown activates at +165°C with 10°C hysteresis - ensuring robust operation in thermally demanding portable and industrial environments.

Is external compensation required for stability with the TC1303C-ZP0EMF?

No, the TC1303C-ZP0EMF is fully internally compensated for both its buck and LDO regulators. This eliminates the need for external compensation capacitors or resistors, simplifying design, reducing BOM count, and improving layout predictability - especially beneficial in space-constrained portable applications where board area is at a premium.