Microchip Technology MIC5331-MNYMT-TR

Overview

MIC5331-MNYMT-TR from Microchip Technology is a dual ultra-low dropout linear regulator (ULDO) delivering two independent 300 mA outputs at fixed 2.8 V and 2.85 V, operating from 2.3 V to 5.5 V input with only 25 µA quiescent current per LDO. It integrates thermal shutdown, current-limit protection, and high PSRR (>65 dB at 1 kHz), enabling use in space-constrained portable devices such as camera phones and GPS receivers.

For engineers reviewing the MIC5331-MNYMT-TR datasheet, MIC5331-MNYMT-TR pinout, MIC5331-MNYMT-TR application, or MIC5331-MNYMT-TR equivalent, key selection criteria include dual-output voltage matching (2.8 V / 2.85 V), 120 mV dropout at 300 mA, stability with 1 µF ceramic capacitors, and TDFN-8 package compatibility for high-density mobile PCB layouts.

Technical Context

The MIC5331-MNYMT-TR implements two independent CMOS-based LDO regulators sharing a common VIN and GND, each with active-high enable (EN1/EN2) for individual power sequencing. Its µCap architecture enables stable operation with minimal 1 µF ceramic output capacitance per channel, reducing board area and BOM cost.

Each regulator features low-noise design (50 µV_RMS, 10 Hz–100 kHz), fast transient response, and high PSRR (>65 dB at 1 kHz, >45 dB at 20 kHz), making it suitable for noise-sensitive analog and mixed-signal subsystems like camera DSPs and RF front-ends where supply ripple rejection is critical.

Key Specifications

Pinout & Package

Package: 8-pin 2 mm × 2 mm × 0.6 mm Thin DFN (TDFN-8, MT suffix), leadless, exposed pad for thermal dissipation (θ_JA = 90°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MIC5331-MNYMT-TR, MIC5332-J4YMT-TR offers identical performance and packaging but different output voltages, while TPL7407LDR serves an entirely distinct function-neither is a drop-in replacement, and voltage-specific designs require careful validation.

Availability

MIC5331-MNYMT-TR is available at Aetrix Electronics and suitable for camera phones, GPS receivers, and portable medical sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MIC5331-MNYMT-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 ISO/TS-16949 certified manufacturing.

The MIC5331 product line delivers micro-power dual LDOs optimized for battery-powered portable electronics where small size, low quiescent current, and high PSRR are essential.

FAQ

What are the fixed output voltages of the MIC5331-MNYMT-TR?

The MIC5331-MNYMT-TR provides two fixed, non-adjustable output voltages: 2.8 V on VOUT1 (pin 8) and 2.85 V on VOUT2 (pin 7). These values are laser-trimmed during manufacturing and specified with ±1% initial accuracy and ±2% over the full –40°C to +125°C temperature range, as confirmed in Table 1-1 of the official datasheet DS20005874A.

Does the MIC5331-MNYMT-TR require external capacitors for stability?

Yes, the MIC5331-MNYMT-TR requires a minimum 1 µF ceramic capacitor from VIN to GND and a minimum 1 µF ceramic capacitor from each VOUT to GND for guaranteed stability. X5R or X7R dielectrics are recommended; Y5V and Z5U are not advised due to excessive capacitance loss over temperature, per Section 4.1 and 4.2 of the MIC5331 datasheet.

How does the enable functionality work on the MIC5331-MNYMT-TR?

The MIC5331-MNYMT-TR features two independent active-high enable inputs: EN1 (pin 5) controls LDO1 (VOUT1), and EN2 (pin 4) controls LDO2 (VOUT2). A logic-high voltage ≥1.2 V enables the respective LDO; ≤0.2 V disables it, reducing ground current to ≤1.0 µA. Neither enable pin may float-each must be actively driven or pulled to GND/VIN via resistor, as stated in Table 3-1 and Section 4.4.

What is the maximum continuous output current per LDO in the MIC5331-MNYMT-TR?

Each LDO in the MIC5331-MNYMT-TR delivers up to 300 mA continuously under thermal limits. The device incorporates foldback current limiting (350–800 mA trip threshold) and thermal shutdown to protect against sustained overload. At 300 mA and 120 mV dropout, power dissipation remains within safe limits for the 2 mm × 2 mm TDFN package with proper PCB copper area, as detailed in Section 4.5 and Table 1-1.

Is the MIC5331-MNYMT-TR compatible with lead-free reflow processes?

Yes, the MIC5331-MNYMT-TR uses a Pb-free 2 mm × 2 mm TDFN package with Matte Tin (Sn) plating, rated for standard lead-free reflow profiles. The maximum lead temperature is +260°C for 3 seconds, and the package complies with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements, as specified on page 5 and in Section 5.1 of DS20005874A.