Microchip Technology MIC5504-2.8YMT-TZ

Overview

MIC5504-2.8YMT-TZ from Microchip Technology is a 300 mA, fixed 2.8 V output low-dropout linear regulator with auto-discharge and internal enable pull-down, operating from 2.5 V to 5.5 V input, delivering ±2% output accuracy and 160 mV dropout at full load-ideal for battery-powered portable electronics requiring fast turn-off and floating-enable robustness.

For engineers reviewing the MIC5504-2.8YMT-TZ datasheet, MIC5504-2.8YMT-TZ pinout, MIC5504-2.8YMT-TZ application, or MIC5504-2.8YMT-TZ equivalent, this page delivers verified electrical specs, thermal behavior, DFN-4 package layout guidance, and real-world use cases in medical wearables, GPS modules, and smart sensor nodes where low quiescent current (38 µA) and output discharge are critical.

Technical Context

The MIC5504-2.8YMT-TZ integrates dual functional enhancements over base LDO variants: an active-low-triggered 25 Ω NFET auto-discharge path on VOUT and a 4 MΩ internal EN pull-down resistor-ensuring deterministic disable during processor boot-up without external biasing. Its CMOS-based control architecture enables zero-off-mode current (<1 µA shutdown) and stable regulation down to no-load conditions.

Designed for ultra-compact layouts, it uses a 1.0 mm × 1.0 mm 4-lead Thin DFN (MT) package with exposed thermal pad, achieving θ_JA = 250°C/W. It supports 1 µF ceramic input/output capacitors, delivers 60 dB PSRR at 1 kHz, and maintains operation across –40°C to +125°C junction temperature range with thermal shutdown and foldback current limiting.

Key Specifications

Pinout & Package

Package: 4-Lead 1.0 mm × 1.0 mm Thin DFN (MT), exposed thermal pad (ePAD) - requires solder connection to GND for optimal thermal performance (θ_JA = 250°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MIC5502-2.8YMT-TR, MIC5504-2.8YMT-TZ eliminates external pull-down components and simplifies boot sequencing; versus XC6210B282MR-G, it adds critical auto-discharge and saves >70% PCB area via 1.0 mm × 1.0 mm DFN packaging.

Availability

MIC5504-2.8YMT-TZ is available at Aetrix Electronics and suitable for wearable medical sensors, GPS modules, and smart industrial sensors requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for MIC5504-2.8YMT-TZ 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 Inc. is a leading provider of microcontroller, analog, FPGA, and mixed-signal semiconductors, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The MIC5504 belongs to Microchip's high-performance, ultra-small-footprint LDO family-designed specifically for space-constrained, battery-powered portable and medical electronics demanding low IQ, fast enable/disable, and robust enable-state handling.

FAQ

What is the maximum input voltage rating for the MIC5504-2.8YMT-TZ?

The MIC5504-2.8YMT-TZ has an absolute maximum input voltage (VIN) rating of +6 V. However, its specified operating input range is +2.5 V to +5.5 V. Exceeding 5.5 V may cause permanent damage or unpredictable behavior, even if below the 6 V absolute limit. Always maintain VIN within 2.5–5.5 V during normal operation to ensure compliance with electrical characteristics and thermal limits.

Does the MIC5504-2.8YMT-TZ require an external pull-down resistor on the EN pin?

No, the MIC5504-2.8YMT-TZ does not require an external pull-down resistor on the EN pin. It integrates a 4 MΩ internal pull-down resistor, ensuring the output remains disabled when EN is left floating-such as during MCU reset or tri-state bus conditions. This eliminates external component count and improves reliability in systems with undriven enable lines.

How quickly does the MIC5504-2.8YMT-TZ discharge its output when disabled?

When the EN pin is pulled low, the MIC5504-2.8YMT-TZ activates an internal 25 Ω NFET between VOUT and GND, discharging a typical 1 µF output capacitor from 2.8 V to under 100 mV in less than 1 ms. This rapid discharge prevents residual voltage from interfering with downstream logic states or causing unintended wake-up events in battery-powered systems.

Can the MIC5504-2.8YMT-TZ operate without an output capacitor?

No-the MIC5504-2.8YMT-TZ requires a minimum 1 µF ceramic output capacitor connected from VOUT to GND for stability, as confirmed in the datasheet Section 4.2. While it remains *in regulation* with no load, removing the output capacitor causes high-frequency oscillation and violates stability criteria. X5R or X7R dielectrics are recommended; Y5V is not suitable due to severe capacitance loss over temperature.

What is the thermal performance of the MIC5504-2.8YMT-TZ in its 1.0 mm × 1.0 mm DFN package?

The MIC5504-2.8YMT-TZ in the 4-lead Thin DFN (MT) package has a junction-to-ambient thermal resistance (θ_JA) of 250°C/W when mounted with proper PCB copper pour connected to the ePAD. At 300 mA load with 3.6 V input and 2.8 V output, power dissipation is ~0.24 W, limiting max ambient temperature to ~65°C for reliable operation at TJ = 125°C-requiring careful thermal layout in enclosed or high-temperature environments.