Microchip Technology MIC2800-G2SYML-TR

Overview

MIC2800-G2SYML-TR from Microchip Technology is a digital power management IC integrating a 2 MHz, 600 mA synchronous buck DC/DC converter and two independent 300 mA LDO regulators (LDO1 and LDO2) in a single 16-pin 3 mm × 3 mm QFN package. It delivers three regulated outputs with adjustable POR delay, LOWQ mode for ultra-low-noise operation (<75 µVRMS), and thermal/current protection-ideal for powering SAMA5D2 MPU core, I/O, and DDR memory rails in portable embedded systems.

For engineers reviewing the MIC2800-G2SYML-TR datasheet, MIC2800-G2SYML-TR pinout, MIC2800-G2SYML-TR application, or MIC2800-G2SYML-TR equivalent, key selection considerations include its dual-LDO architecture with LDO1 powered by the DC/DC output, LOWQ mode's 30 µA total quiescent current, 2.7–5.5 V input range, and open-drain POR flag with programmable delay via CSET capacitor.

Technical Context

The MIC2800-G2SYML-TR implements a digitally controlled hybrid regulation architecture: the main DC/DC converter operates in fixed-frequency 2 MHz PWM mode (up to 600 mA) or transitions to LOWQ mode where it shuts down switching and enables an internal linear regulator for noise-sensitive loads. LDO1 draws input directly from the DC/DC output, enabling efficient 1.8 V → 1.5 V or 1.2 V conversion, while LDO2 is independently powered from VIN and supports up to 300 mA at dropout as low as 70 mV @ 150 mA.

Its functional safety features include overtemperature shutdown (160°C), current limiting on all three outputs, and a logic-OR'd open-drain POR signal that monitors undervoltage across all enabled outputs. The LOWQ and POR pins are ESD-protected without clamping diodes to supply rails, enabling safe interfacing with backup-power-domain host I/Os even when main power is absent.

Key Specifications

Pinout & Package

Package: 16-pin, 3 mm × 3 mm, 0.5 mm pitch QFN with exposed thermal pad (PGND-connected). Pin 1 marked by dot; no lead finish specified in source.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail power management applications.

Compared with TPS65023BRSBR and RT8070ZSP, the MIC2800-G2SYML-TR uniquely combines programmable POR delay, LOWQ ultra-low-noise mode, and backup-power-safe signaling-making it the only choice for SAMA5D2-based designs requiring robust sequencing and RF coexistence.

Availability

MIC2800-G2SYML-TR is available at Aetrix Electronics and suitable for embedded MPU power, portable system I/O supply, low-power RF subsystems, and backup power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for MIC2800-G2SYML-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 Inc. is a leading provider of microcontrollers, analog, FPGA, and power management solutions, serving automotive, industrial, communications, and consumer markets.

The MIC2800 product line delivers highly integrated, low-noise power management ICs optimized for ARM-based MPUs like SAMA5D2, emphasizing sequenced multi-rail delivery, battery efficiency in light-load conditions, and robustness in mixed-signal environments.

FAQ

What is the input voltage range supported by the MIC2800-G2SYML-TR?

The MIC2800-G2SYML-TR supports an input voltage range of 2.7 V to 5.5 V. This allows direct operation from single-cell Li-ion batteries (3.0–4.2 V), USB 5 V supplies, or regulated 3.3 V system rails. Absolute maximum rating is 6.0 V, but sustained operation above 5.5 V is not guaranteed and may damage the device.

How does the LOWQ mode affect output capability and noise performance of the MIC2800-G2SYML-TR?

In LOWQ mode (LOWQ pin pulled low), the MIC2800-G2SYML-TR disables its PWM DC/DC converter and uses an internal linear regulator to maintain output voltage, reducing total quiescent current to 30 µA and output noise to 75 µVRMS. However, LDO1 and LDO2 output current is limited to 10 mA each in this mode, and the DC/DC output is no longer active-only the LDO outputs remain functional.

Can the MIC2800-G2SYML-TR power both the core and I/O rails of a SAMA5D2 MPU simultaneously?

Yes, the MIC2800-G2SYML-TR is explicitly designed for this use case: its DC/DC output powers LDO1 (for VDD_CORE), while LDO2 (powered from VIN) supplies VDD_IO. The typical application circuit on page 2 of DS20005839B shows direct integration with the SAMA5D2, delivering 1.2 V core, 2.8 V I/O, and 1.8 V DDR rails with coordinated POR signaling.

What is the purpose of the CSET pin on the MIC2800-G2SYML-TR, and how is it configured?

The CSET pin on the MIC2800-G2SYML-TR is a 1.25 µA current source used to program the POR delay time. Connecting a capacitor from CSET to SGND sets the delay in microseconds equal to the capacitor value in picofarads (e.g., 100 nF = 100,000 pF = 100 µs). Leaving CSET open yields minimum delay (~1 µs); grounding it is prohibited and will damage the pin.

Does the MIC2800-G2SYML-TR provide thermal protection, and what is the shutdown threshold?

Yes, the MIC2800-G2SYML-TR includes internal thermal shutdown protection that activates at a junction temperature of 160°C, with 23°C hysteresis (re-enabling at ~137°C). This protects against sustained overload or poor PCB thermal design. The device's 45°C/W junction-to-ambient thermal resistance (θJA) means power dissipation must be limited to avoid exceeding this threshold-e.g., at 25°C ambient, max safe PD ≈ (160 − 25)/45 = 3.0 W.