Microchip Technology MIC5335-SFYMT-TR

Overview

MIC5335-SFYMT-TR from Microchip Technology is a dual-channel, ultra-low dropout (ULDO) linear regulator delivering two independent 300 mA outputs with fixed 3.3V and 1.5V outputs. It operates from 2.3V to 5.5V input, achieves 75 mV dropout at full load, and maintains stability with only 1 µF ceramic output capacitors. Designed for space-constrained portable electronics, it powers RF receivers and baseband subsystems in GPS receivers and mobile phones.

For engineers reviewing the MIC5335-SFYMT-TR datasheet, MIC5335-SFYMT-TR pinout, MIC5335-SFYMT-TR application, or MIC5335-SFYMT-TR equivalent, key selection criteria include dual independent enable control, µCap stability with minimal external capacitance, thermal performance in the 1.6 mm × 1.6 mm TDFN package, and PSRR >65 dB at 1 kHz for noise-sensitive analog/RF rails.

Technical Context

The MIC5335-SFYMT-TR integrates two fully independent CMOS-based LDO regulators sharing only VIN and GND. Each channel features active-high enable (EN1/EN2), current limit protection (>340 mA), and thermal shutdown. Its µCap architecture eliminates need for large bypass capacitors by optimizing internal compensation for 1 µF ceramic output caps.

It delivers high PSRR (65 dB @ 1 kHz, 45 dB @ 20 kHz) and low output noise (90 µV_RMS, 10 Hz–100 kHz), enabling clean power delivery to sensitive RF and mixed-signal circuits. The device sustains regulation down to zero load and supports operation across –40°C to +125°C junction temperature with 100°C/W θ_JA.

Key Specifications

Pinout & Package

Package: 6-lead 1.6 mm × 1.6 mm × 0.55 mm Thin DFN (TDFN-6, MT), thermally enhanced with exposed EPAD tied to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-LDO regulator applications.

Compared with TPS70245PWPR and AP7361-D-3315H, the MIC5335-SFYMT-TR offers superior thermal performance via its EPAD-equipped 1.6 mm² TDFN package, lower dropout for extended battery life, and guaranteed µCap stability-making it optimal for ultra-compact, high-efficiency portable designs where board area and power integrity are critical.

Availability

MIC5335-SFYMT-TR is available at Aetrix Electronics and suitable for GPS receivers, mobile phone baseband subsystems, and portable media players requiring stable component supply with tight voltage accuracy and low-noise performance.

Supply support for MIC5335-SFYMT-TR 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 broad industrial and automotive qualification.

The MIC5335 product line delivers dual-channel, ultra-low dropout regulators optimized for space-constrained portable electronics demanding high current density, µCap stability, and independent power rail control.

FAQ

What are the fixed output voltages of the MIC5335-SFYMT-TR?

The MIC5335-SFYMT-TR provides fixed output voltages of 3.3V on VOUT1 and 1.5V on VOUT2, as confirmed by Microchip's official part marking table (SPF code) and electrical specifications. These values are factory-trimmed and do not require external feedback resistors. Output voltage accuracy is ±2.0% over temperature and load, ensuring reliable operation in battery-powered GPS and mobile applications where precise rail generation is critical.

Does the MIC5335-SFYMT-TR require external capacitors for stability?

Yes, the MIC5335-SFYMT-TR requires a 1 µF ceramic capacitor on VIN to GND and 1 µF ceramic capacitors on each VOUT to GND for guaranteed stability, as specified in Section 4.2 and 4.3 of the datasheet. X7R or X5R dielectrics are recommended due to their stable capacitance over temperature. Unlike many legacy LDOs, the MIC5335-SFYMT-TR does not require minimum ESR or larger capacitance values-its µCap design is validated specifically for 1 µF.

How does the thermal performance of the MIC5335-SFYMT-TR compare to standard SOT-23 dual LDOs?

The MIC5335-SFYMT-TR uses a 1.6 mm × 1.6 mm TDFN package with an exposed thermal pad (EPAD), achieving a θ_JA of 100°C/W-significantly better than typical SOT-23 dual LDOs (θ_JA ≈ 200–250°C/W). This allows continuous 300 mA per channel operation at ambient temperatures up to 86°C (calculated per Equation 4-3), making it suitable for thermally dense portable designs where SOT-23 alternatives would require derating or forced cooling.

Can the MIC5335-SFYMT-TR operate with no load on either output?

Yes, the MIC5335-SFYMT-TR remains stable and in regulation with zero load on either or both outputs, as explicitly stated in Section 4.4 "No-Load Stability". This capability is essential for applications like CMOS RAM keep-alive circuits or standby logic rails where one LDO may be active while the other is idle. No minimum load resistor is required, simplifying design and reducing power waste.

What is the maximum allowable input voltage for the MIC5335-SFYMT-TR?

The absolute maximum input voltage for the MIC5335-SFYMT-TR is +6V, but the recommended operating range is +2.3V to +5.5V, as defined in the Electrical Characteristics table. Exceeding 5.5V risks violating the safe operating area, especially under high ambient temperature or full load conditions. For 3.3V/1.5V outputs, typical use cases apply 3.6V–5.0V inputs (e.g., single-cell Li-ion or USB-powered systems), staying well within the specified range.