Microchip Technology MIC2800-GFSYML-TR

Overview

MIC2800-GFSYML-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 LDOs (LDO1 fed by DC/DC output, LDO2 fed directly from VIN). It delivers three regulated outputs with <30 µA total quiescent current in LOWQ mode, 75 µVRMS DC/DC output noise, and thermal/current protection - deployed in embedded MPU power rails for SAMA5D2-based industrial controllers.

For engineers reviewing the MIC2800-GFSYML-TR datasheet, MIC2800-GFSYML-TR pinout, MIC2800-GFSYML-TR application, or MIC2800-GFSYML-TR equivalent, key selection criteria include its triple-output architecture with programmable POR delay, LOWQ mode's ultra-low-noise linear regulation, and QFN-16 (3 mm × 3 mm) package compatibility with space-constrained portable and backup-power systems.

Technical Context

The MIC2800-GFSYML-TR implements a dual-mode DC/DC regulator: PWM mode (2 MHz fixed-frequency, up to 600 mA, >90% efficiency at 300 mA) and LOWQ mode (light-load linear regulation, 75 µVRMS noise, 30 µA IQ). LDO1 draws input from the DC/DC output (enabling efficient 1.8 V → 1.5 V conversion), while LDO2 accepts direct VIN input (2.7–5.5 V) with 70 mV dropout at 150 mA.

Its functional architecture includes an open-drain POR output with capacitor-programmable delay (CSET pin), leakage-free LOWQ and POR pins compatible with backup power domains, and separate EN1 (DC/DC + LDO1) and EN2 (LDO2 only) enables supporting independent power sequencing - critical for multi-rail MPU boot integrity.

Key Specifications

Pinout & Package

Package: 16-pin 3 mm × 3 mm QFN (leadless, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65023BRSBT and MAX20029ATPA/V+T, the MIC2800-GFSYML-TR uniquely combines 75 µVRMS LOWQ noise, capacitor-programmable POR delay, and backup-power-safe signaling - making it optimal for MPU-based systems demanding both precision sequencing and RF coexistence.

Availability

MIC2800-GFSYML-TR is available at Aetrix Electronics and suitable for embedded MPU power, portable/wearable systems, and low-power RF applications requiring stable component supply across long-lifecycle industrial programs.

Supply support for MIC2800-GFSYML-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 for industrial, automotive, and consumer markets.

The MIC2800-GFSYML-TR belongs to Microchip's digital power management product line, designed specifically for space-constrained, battery-sensitive applications requiring multi-rail sequencing, ultra-low-noise operation, and robust fault protection.

FAQ

What is the function of the LOWQ pin on the MIC2800-GFSYML-TR?

The LOWQ pin on the MIC2800-GFSYML-TR is an active-low control input that switches the device between two operating modes: when pulled high (>1 V), it enables full-power 2 MHz PWM operation delivering up to 600 mA; when pulled low (<0.2 V), it activates LOWQ mode - disabling the DC/DC switcher and using the internal LDO to regulate output with only 30 µA total quiescent current and 75 µVRMS noise. This pin has no clamping diodes, allowing safe interfacing with backup power domains.

How is the Power-on Reset (POR) delay programmed for the MIC2800-GFSYML-TR?

The POR delay for the MIC2800-GFSYML-TR is programmed using an external capacitor connected from the CSET pin (Pin 13) to SGND. The MIC2800-GFSYML-TR sources a precise 1.25 µA current into this capacitor; when the voltage across it reaches 1.25 V, the POR output is allowed to go high. The delay time in microseconds equals the capacitor value in picofarads - e.g., a 100 nF capacitor yields a 100 ms delay. The POR low-to-high assertion is programmable; low-to-high detection remains instantaneous.

Can the MIC2800-GFSYML-TR power both core and I/O rails of an ARM-based MPU simultaneously?

Yes, the MIC2800-GFSYML-TR is explicitly designed for this use case: LDO1 (Pin 11) delivers up to 300 mA at voltages down to 0.8 V and is powered by the DC/DC output - ideal for MPU core rails (e.g., 1.1 V or 1.2 V); LDO2 (Pin 8) delivers up to 300 mA directly from VIN - suitable for I/O or DDR termination rails (e.g., 1.8 V or 3.3 V); and the DC/DC converter (Pin 5/SW) provides the intermediate bus (e.g., 1.8 V) feeding LDO1. All three outputs operate concurrently with independent enable control.

What is the maximum output current capability of LDO1 in LOWQ mode on the MIC2800-GFSYML-TR?

In LOWQ mode, the MIC2800-GFSYML-TR limits LDO1 output current to 10 mA - as specified in the datasheet's "LOWQ = Low (Light Load Mode)" sections for LDO1 electrical characteristics. This restriction ensures stable low-noise operation and matches the reduced bias current budget of the mode. For full 300 mA LDO1 output, LOWQ must be held high to activate PWM mode and enable the DC/DC stage to supply LDO1's input.

Does the MIC2800-GFSYML-TR support independent enable control for its DC/DC and LDO outputs?

Yes, the MIC2800-GFSYML-TR provides fully independent enable control: EN1 (Pin 15) controls both the DC/DC converter and LDO1, while EN2 (Pin 16) controls only LDO2. This allows flexible power sequencing - for example, enabling LDO2 first to power I/O peripherals, then asserting EN1 to bring up the core rail and DC/DC bus. Both inputs are CMOS-compatible with VIH ≥ 1.0 V and must never be left floating.