Microchip Technology MIC2800-G4KYML-TR

Overview

MIC2800-G4KYML-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 from 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-G4KYML-TR datasheet, MIC2800-G4KYML-TR pinout, MIC2800-G4KYML-TR application, or MIC2800-G4KYML-TR equivalent, key selection criteria include its triple-output architecture, LOWQ light-load mode current (<30 µA), 75 µVRMS DC/DC noise in LOWQ, thermal shutdown protection, and 16-pin 3 mm × 3 mm QFN package with separate SGND/PGND pins for noise isolation.

Technical Context

The MIC2800-G4KYML-TR implements a dual-mode regulation architecture: full-power PWM mode (2 MHz switching, up to 600 mA) and LOWQ linear-regulator mode (active when LOWQ pin <0.2 V), where the DC/DC stage shuts down and LDO2 supplies up to 60 mA with 75 µVRMS noise. The LDO1 input is tied to the DC/DC output, enabling efficient 1.8 V → 1.5 V conversion.

It features an open-drain POR output with programmable delay (via CSET capacitor), separate enable inputs (EN1 for DC/DC+LDO1, EN2 for LDO2), and ESD-hardened LOWQ/POR pins compatible with backup power domain interfacing. Thermal shutdown triggers at 160°C with 23°C hysteresis.

Key Specifications

Pinout & Package

The MIC2800-G4KYML-TR is housed in a 16-pin, 3 mm × 3 mm QFN package with wettable flanks and an exposed thermal pad. Signal ground (SGND) and power ground (PGND) are physically separated to minimize noise coupling between control circuitry and high-current switch-node paths.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-output PMIC applications.

Compared with TPS65023BRSBT and RT8070ZSP, the MIC2800-G4KYML-TR uniquely combines triple-output capability, programmable POR sequencing, and LOWQ mode's 75 µVRMS noise-making it the only option that satisfies simultaneous requirements for compact MPU power, RF cleanliness, and backup-domain interoperability.

Availability

MIC2800-G4KYML-TR is available at Aetrix Electronics and suitable for embedded MPU power sequencing, portable/wearable devices, low-power RF systems, and backup power systems requiring stable component supply across long production lifecycles.

Supply support for MIC2800-G4KYML-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 applications.

The MIC2800 product line is designed for high-efficiency, multi-rail power management in resource-constrained embedded systems-emphasizing low-noise operation, flexible sequencing, and robustness in battery-powered and backup-aware environments.

FAQ

What is the function of the LOWQ pin on the MIC2800-G4KYML-TR?

The LOWQ pin on the MIC2800-G4KYML-TR is an active-low mode control input. When pulled below 0.2 V, it disables the DC/DC converter and activates a low-noise linear regulator path, reducing total quiescent current to <30 µA and delivering 75 µVRMS output noise. When driven above 1.0 V, the device operates in full-power 2 MHz PWM mode capable of 600 mA output. This pin is ESD-hardened and compatible with backup power domain I/Os.

How does the POR output behave on the MIC2800-G4KYML-TR?

The POR output on the MIC2800-G4KYML-TR is an open-drain, active-low signal indicating undervoltage on any enabled output (DC/DC, LDO1, or LDO2). Its low-to-high assertion delay is programmable via a capacitor on the CSET pin (delay in µs = capacitance in pF), with a maximum of 1 second. High-to-low response is immediate. The POR pin has no clamping diodes, allowing safe pull-up to backup supplies-even when VIN is absent.

What are the grounding requirements for optimal noise performance of the MIC2800-G4KYML-TR?

The MIC2800-G4KYML-TR requires strict separation of SGND (signal ground) and PGND (power ground) to achieve specified noise performance. SGND carries low-current bias and feedback signals; PGND handles high-current switch-node return paths. These grounds must be connected at a single point near the device's thermal pad, with separate copper pours and no shared vias. Failure to isolate SGND/PGND degrades PSRR and increases output noise beyond the rated 75 µVRMS in LOWQ mode.

Can the MIC2800-G4KYML-TR support different output voltage combinations?

Yes-the MIC2800-G4KYML-TR supports multiple fixed-output configurations via internal resistor dividers on the FB pin. The G4 suffix indicates a specific factory-programmed variant: DC/DC = 1.87 V, LDO1 = 1.5 V, LDO2 = 2.8 V. Other variants (e.g., G1JS = 1.8 V/1.2 V/3.3 V) exist, but voltage values are not user-adjustable. External resistors cannot reprogram the FB network-only factory-set options are available.

What thermal considerations apply to the MIC2800-G4KYML-TR in continuous 600 mA operation?

In continuous 600 mA operation, the MIC2800-G4KYML-TR's junction temperature rise depends on ambient temperature and PCB thermal design. With θJA = 45°C/W, dissipating 0.5 W (typical at 600 mA, 3.3 V input → 1.87 V output) causes ~22.5°C rise above ambient. To stay within the 125°C max junction limit, ambient must remain ≤102.5°C with adequate copper area and thermal vias under the exposed pad. Thermal shutdown activates at 160°C with 23°C hysteresis.