Microchip Technology MIC94310-DYMT-T5

Overview

MIC94310-DYMT-T5 from Microchip Technology is a 200 mA fixed-output LDO voltage regulator with Ripple Blocker™ technology, designed to suppress switching noise from DC/DC converters in RF-sensitive signal chains. It operates from 1.8V to 3.6V input, delivers 1.8V output with ±1% accuracy, achieves >50 dB PSRR from 10 Hz to 10 MHz at 200 mA load, and features logic-controlled enable and thermal/current protection - deployed in smartphone baseband power rails and GPS receiver analog supplies.

For engineers reviewing the MIC94310-DYMT-T5 datasheet, MIC94310-DYMT-T5 pinout, MIC94310-DYMT-T5 application, or MIC94310-DYMT-T5 equivalent, key selection criteria include its ultra-high PSRR across 10 Hz–10 MHz, 200 mA output capability with <50 mV dropout at full load, 1.2 mm × 1.6 mm TDFN-4 package with exposed pad, -40°C to +125°C junction temperature range, and CMOS-compatible enable threshold (VEN_HIGH ≥ 1.0 V).

Technical Context

The MIC94310-DYMT-T5 integrates a high-bandwidth error amplifier and charge-pump bias circuit to maintain stable regulation under fast load transients while rejecting ripple via active noise cancellation. Its architecture enables >85 dB PSRR at 100 Hz and >50 dB up to 10 MHz without requiring external compensation components.

It uses a CMOS-based pass element with integrated thermal shutdown and foldback current limiting. The EN pin directly controls internal bias generation, enabling sub-1 μA shutdown current and 70 μs turn-on time - critical for power-gated RF subsystems where supply sequencing and noise isolation are tightly coupled.

Key Specifications

Pinout & Package

Package: 4-pin 1.2 mm × 1.6 mm Thin DFN (TDFN) with exposed thermal pad (EPAD), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO-with-ripple-rejection applications.

Compared with XC6216D182MR-G and ADM7150ACPZ-1.8-R7, the MIC94310-DYMT-T5 uniquely sustains >50 dB PSRR up to 10 MHz in a 1.2 mm × 1.6 mm TDFN, enabling compact, high-performance noise filtering for modern RF and high-speed digital systems without external passive components.

Availability

MIC94310-DYMT-T5 is available at Aetrix Electronics and suitable for smartphone baseband power, GPS receiver analog supply, and automotive infotainment audio requiring stable component supply with guaranteed long-term availability and full traceability.

Supply support for MIC94310-DYMT-T5 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, interface, power management, and timing solutions, serving automotive, industrial, communications, and consumer markets.

The MIC94310 belongs to Microchip's Ripple Blocker™ LDO family, engineered specifically to replace discrete RC/LC filters in noise-critical power domains where DC/DC converter ripple compromises RF performance or high-speed signal integrity.

FAQ

What is the maximum input voltage rating for the MIC94310-DYMT-T5?

The MIC94310-DYMT-T5 has an absolute maximum input voltage rating of +4.0 V. Its recommended operating input voltage range is 1.8 V to 3.6 V. Exceeding 4.0 V may cause permanent damage. This rating is defined in the Absolute Maximum Ratings table on page 3 of the DS20006105B datasheet and applies to all package variants including the TDFN-4 used in MIC94310-DYMT-T5.

Does the MIC94310-DYMT-T5 require an external output capacitor, and if so, what value is recommended?

Yes, the MIC94310-DYMT-T5 requires an external output capacitor for stability and optimal PSRR. For the 1.2 mm × 1.6 mm TDFN package (used in MIC94310-DYMT-T5), a minimum of 0.47 µF is required, but 1 µF X7R/X5R ceramic is recommended per Section 4.2 of the datasheet. Larger values do not significantly improve performance and may degrade transient response.

What is the thermal resistance (θJA) of the MIC94310-DYMT-T5 package?

The MIC94310-DYMT-T5 uses the 4-pin 1.2 mm × 1.6 mm TDFN package, which has a junction-to-ambient thermal resistance (θJA) of 173°C/W, as specified on page 4 of the DS20006105B datasheet. This value assumes proper PCB layout with the EPAD soldered to a thermally adequate ground plane.

Can the MIC94310-DYMT-T5 be used in automotive applications requiring extended temperature range?

Yes, the MIC94310-DYMT-T5 is rated for a junction temperature range of -40°C to +125°C, making it suitable for automotive infotainment and ADAS camera modules. Its qualification aligns with AEC-Q100 stress test guidelines for Grade 2 (-40°C to +105°C ambient) and Grade 3 (-40°C to +85°C ambient) applications, though full AEC-Q100 certification status should be confirmed with Microchip documentation.

How does the enable pin (EN) function on the MIC94310-DYMT-T5, and what are its voltage thresholds?

The EN pin on the MIC94310-DYMT-T5 is a CMOS-compatible logic input. It enables the regulator when driven to ≥1.0 V (VEN_HIGH) and disables it when ≤0.4 V (VEN_LOW). In shutdown, quiescent current drops to ≤5 µA. The pin must never be left floating - datasheet Section 3.0 mandates connection to a defined logic level to avoid indeterminate output states.