Microchip Technology MIC2800-A4SYML-TR

Overview

MIC2800-A4SYML-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 ±2% voltage accuracy, supports LOWQ mode for ultra-low-noise operation (75 µVRMS), and operates across 2.7V–5.5V input. It is used in embedded MPU power sequencing for SAMA5D2-based systems requiring clean core, I/O, and DDR supply rails.

For engineers reviewing the MIC2800-A4SYML-TR datasheet, MIC2800-A4SYML-TR pinout, MIC2800-A4SYML-TR application, or MIC2800-A4SYML-TR equivalent, key selection criteria include dual-LDO flexibility, LOWQ mode quiescent current (<30 µA), 75 µVRMS noise in light-load mode, thermal shutdown protection, and compatibility with small ceramic capacitors and 2.2 µH inductors in space-constrained portable designs.

Technical Context

The MIC2800-A4SYML-TR implements a dual-mode regulation architecture: full-power PWM mode (2 MHz fixed-frequency switching) for high-efficiency conversion up to 600 mA, and LOWQ mode (active-low logic control) that disables the DC/DC stage and enables an internal linear regulator to supply up to 60 mA with <75 µVRMS output noise. Its POR circuit provides programmable delay via CSET capacitor and performs OR-combined undervoltage detection across all three outputs.

Pin-level control separates power domains: EN1 enables both DC/DC and LDO1, EN2 controls LDO2 independently, and LOWQ selects between PWM and low-noise linear operation. The device uses separate SGND and PGND pins, requires external 0.1 µF BIAS bypass, and features ESD-hardened LOWQ and POR pins for reliable interfacing with backup-power domain host I/Os without parasitic leakage.

Key Specifications

Pinout & Package

Tiny 16-pin 3 mm × 3 mm QFN package with exposed thermal pad (pin 1 = LOWQ, pin 16 = EN2); requires separate SGND and PGND routing for optimal noise and thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power management IC applications.

Compared with TPS65023BRSBT and RT8070ZSP, the MIC2800-A4SYML-TR uniquely integrates programmable POR, backup-power-safe I/Os, and a dedicated LOWQ mode delivering 75 µVRMS noise-making it the only option for compact, RF-coexistent, and long-life battery-powered MPU systems requiring three precisely sequenced rails.

Availability

MIC2800-A4SYML-TR is available at Aetrix Electronics and suitable for embedded MPU power sequencing, portable wearable systems, low-power RF subsystems, and backup power management requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.

Supply support for MIC2800-A4SYML-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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, consumer, and communications markets with high-reliability semiconductor products.

The MIC2800-A4SYML-TR belongs to Microchip's digital power management IC product line, designed specifically for space-constrained, battery-operated embedded systems requiring multi-rail sequencing, ultra-low-noise operation, and seamless transition between full-power and backup domains.

FAQ

What is the primary function of the LOWQ pin on the MIC2800-A4SYML-TR?

The LOWQ pin on the MIC2800-A4SYML-TR is an active-low logic input that selects between two operating modes: when pulled high (>1V), the device operates in full-power 2 MHz PWM mode delivering up to 600 mA; when pulled low (<0.2V), it enters LOWQ mode, disabling the DC/DC stage and enabling an internal linear regulator to supply up to 60 mA with ultra-low 75 µVRMS output noise. This pin also enables leakage-free interfacing with backup-power domain host I/Os.

How does the POR functionality work on the MIC2800-A4SYML-TR?

The POR (Power-on Reset) output on the MIC2800-A4SYML-TR is an open-drain signal that asserts low if any of the three regulated outputs (DC/DC, LDO1, or LDO2) falls outside its regulation window. Its delay time from power-up to high assertion is programmable via an external capacitor on the CSET pin (delay in µs = capacitance in pF). The MIC2800-A4SYML-TR's POR performs an OR-combined status check across all enabled outputs and supports pull-up to backup power sources due to ESD-hardened pin structure.

Can the MIC2800-A4SYML-TR support independent enable control of its three output rails?

Yes, the MIC2800-A4SYML-TR supports independent enable control: EN1 (Pin 15) enables or disables both the DC/DC converter and LDO1 simultaneously, while EN2 (Pin 16) controls LDO2 independently. This allows flexible power sequencing-for example, powering LDO2 first for I/O initialization, then enabling DC/DC + LDO1 for core voltage-without requiring external logic or timing components.

What are the minimum external components required for stable operation of the MIC2800-A4SYML-TR?

For stable operation, the MIC2800-A4SYML-TR requires: (1) ≥4.7 µF ceramic capacitor between VIN and PGND; (2) 0.1 µF ceramic capacitor between BIAS and SGND; (3) 2.2 µF ceramic capacitor on each LDO output (LDO1, LDO2); (4) 2.2 µH shielded inductor between SW and output; and (5) optional 0.1 µF capacitor on CBYP for enhanced PSRR. No external compensation network is needed-the MIC2800-A4SYML-TR is internally compensated for use with standard ceramic capacitors.

Does the MIC2800-A4SYML-TR provide thermal protection, and how does it behave under overload?

Yes, the MIC2800-A4SYML-TR includes thermal shutdown protection that activates at 160°C junction temperature with 23°C hysteresis. Under sustained overload, the device shuts down completely-halting switching and disabling all outputs-until die temperature drops below 137°C, at which point it automatically recovers. This behavior prevents permanent damage and ensures safe operation in enclosed or poorly ventilated enclosures where the MIC2800-A4SYML-TR may operate near its 45°C/W θJA limit.