Microchip Technology MIC2800-GFMYML-TR

Overview

MIC2800-GFMYML-TR from Microchip Technology is a digital power management IC integrating a 2 MHz, 600 mA PWM buck converter with two independent 300 mA LDOs (LDO1 and LDO2), an adjustable power-on reset (POR) output, and LOWQ mode for ultra-low-noise light-load operation. It delivers three regulated outputs - DC/DC (adjustable or fixed), LDO1 (fed from DC/DC), and LDO2 (fed from VIN) - with <30 µA total quiescent current in LOWQ mode and 75 µVRMS output noise, targeting embedded MPU core/I/O rail sequencing in battery-powered systems.

For engineers reviewing the MIC2800-GFMYML-TR datasheet, MIC2800-GFMYML-TR pinout, MIC2800-GFMYML-TR application, or MIC2800-GFMYML-TR equivalent, key selection criteria include its triple-output architecture, LOWQ mode's 20–30 µA IQ with 60 mA LDO2 support, 2 MHz fixed-frequency PWM operation, thermal/current protection, and 16-pin 3 mm × 3 mm QFN package with separate SGND/PGND pins for noise-sensitive RF and low-power MCU designs.

Technical Context

The MIC2800-GFMYML-TR implements a dual-mode regulation architecture: full-power PWM mode (LOWQ = high) enables up to 600 mA from the buck stage and 300 mA each from LDO1 and LDO2, while LOWQ mode (LOWQ = low) disables the buck switcher and uses an internal linear regulator to supply up to 60 mA to LDO2 with <75 µVRMS noise and <30 µA total IQ. The device features independent enable controls (EN1 for DC/DC+LDO1, EN2 for LDO2), open-drain POR with programmable delay via CSET capacitor, and separate signal (SGND) and power (PGND) ground paths to minimize coupling between control and switching circuits.

Its functional partitioning supports precise power sequencing: LDO1 derives input from the DC/DC output (enabling efficient 1.8 V → 1.5 V or 1.2 V conversion), LDO2 draws directly from VIN (supporting independent I/O rail generation), and the POR output performs logic-OR monitoring across all three outputs with user-adjustable assertion delay. The BIAS pin powers internal references via a 6 Ω resistor, requiring only a 0.1 µF bypass capacitor, and the LOWQ/POR pins are ESD-protected without clamping diodes - enabling safe interfacing with backup-power-domain host I/Os.

Key Specifications

Pinout & Package

The MIC2800-GFMYML-TR is housed in a 16-pin, 3 mm × 3 mm, 0.5 mm pitch QFN package with exposed thermal pad (pin 16 is LOWQ, not thermal pad). It features physically separated SGND (pin 3) and PGND (pin 4) pins to isolate analog control ground from high-current switching return paths, critical for noise-sensitive applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65023BRSBR and MAX20029ATGB/V+T, the MIC2800-GFMYML-TR uniquely combines <30 µA LOWQ IQ, 75 µVRMS noise, and CSET-programmable POR delay in a 3×3 mm footprint - making it optimal for space-constrained, battery-operated systems demanding both ultra-low sleep current and RF-grade cleanliness.

Availability

MIC2800-GFMYML-TR is available at Aetrix Electronics and suitable for embedded MPU power sequencing, low-power wearable RF systems, and industrial backup power applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MIC2800-GFMYML-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 leading provider of microcontrollers, analog devices, and power management ICs, serving industrial, automotive, and consumer markets with high-reliability semiconductor solutions.

The MIC2800 product line delivers compact, highly integrated power management ICs optimized for battery-powered embedded systems requiring precise multi-rail sequencing, ultra-low sleep current, and RF-clean operation - particularly for ARM-based MPUs and wireless sensor nodes.

FAQ

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

The LOWQ pin on the MIC2800-GFMYML-TR is an active-low mode control input that selects between full-power PWM operation (LOWQ = high) and ultra-low-noise linear regulation (LOWQ = low). In LOWQ mode, the buck converter is disabled, reducing total quiescent current to ≤30 µA while delivering up to 60 mA from LDO2 with 75 µVRMS output noise - critical for RF receive and sensor bias applications. The MIC2800-GFMYML-TR's LOWQ pin has no clamping diodes to VIN, enabling safe interface with backup-power-domain host I/Os.

How does the POR output of the MIC2800-GFMYML-TR behave during power-up and fault conditions?

The POR output of the MIC2800-GFMYML-TR is an open-drain signal that asserts low if any of the three regulated outputs (DC/DC, LDO1, or LDO2) falls outside regulation. Its high-to-low transition is immediate upon undervoltage detection, while the low-to-high transition is delayed by a user-programmable time set via a capacitor on the CSET pin (1 µs per pF, up to ~1 s). During normal operation, POR remains high only when all enabled outputs are within specification. The MIC2800-GFMYML-TR's POR pin is ESD-protected without clamping diodes, allowing pull-up to backup supplies.

Can the MIC2800-GFMYML-TR support independent power sequencing of its three outputs?

Yes, the MIC2800-GFMYML-TR supports independent sequencing via EN1 (controls DC/DC and LDO1) and EN2 (controls LDO2 only), enabling staggered turn-on of core, I/O, and peripheral rails. The POR output provides system-level status monitoring across all outputs, and the CSET pin allows adjustment of the POR assertion delay to match MPU reset timing requirements. This makes the MIC2800-GFMYML-TR suitable for complex sequencing in SAMA5D2 and similar MPUs without external controllers.

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

The MIC2800-GFMYML-TR requires strict separation of SGND (pin 3) and PGND (pin 4) to achieve specified noise and PSRR performance. SGND serves as the return path for low-current analog circuitry (BIAS, FB, CSET, POR, EN1/EN2), while PGND handles high-current switching return (SW, VIN, LDO2). These grounds must be connected at a single point near the device's thermal pad or via a dedicated star ground - never routed as a shared plane. Failure to isolate SGND/PGND degrades LOWQ mode noise below the guaranteed 75 µVRMS and compromises POR accuracy. The MIC2800-GFMYML-TR's layout guidelines mandate this separation.

What is the maximum output current capability of LDO1 and LDO2 in LOWQ mode on the MIC2800-GFMYML-TR?

In LOWQ mode (LOWQ = low), the MIC2800-GFMYML-TR disables the buck converter and relies on an internal linear regulator to supply LDO2. LDO2 can deliver up to 60 mA in this mode, while LDO1 is disabled. The datasheet explicitly states "LOWQ mode also limits the output load of both LDO1 and LDO2 to 10 mA" only when both are active - but LDO1 is inactive in LOWQ mode due to loss of its input source (the DC/DC output). Therefore, the MIC2800-GFMYML-TR's LDO2 supports 60 mA in LOWQ mode, and LDO1 is not operational. This configuration ensures minimal IQ while maintaining a clean, low-noise backup rail.