Microchip Technology MIC2800-G4SYML-TR

Overview

MIC2800-G4SYML-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) in a single 16-pin 3 mm × 3 mm QFN package. It delivers three regulated outputs with <2% voltage accuracy, supports LOWQ mode for ultra-low-noise operation (75 µVRMS), and enables precise power sequencing in embedded MPU systems.

For engineers reviewing the MIC2800-G4SYML-TR datasheet, MIC2800-G4SYML-TR pinout, MIC2800-G4SYML-TR application, or MIC2800-G4SYML-TR equivalent, this page provides verified technical context, validated pin functions, confirmed low-noise LDO performance metrics, and real-world sequencing behavior for SAMA5D2-based designs requiring backup-power-safe POR and leakage-free host interfacing.

Technical Context

The MIC2800-G4SYML-TR implements a dual-mode regulation architecture: full-power PWM mode (2 MHz fixed-frequency switching, >90% efficiency at 600 mA) and LOWQ linear-regulator mode (30 µA total IQ, 75 µVRMS noise, 60 mA LDO-sourced output). Its POR output performs a logic-OR of all three regulated outputs with programmable delay via CSET capacitor.

Pin-level design enforces strict separation between signal ground (SGND) and power ground (PGND), while LOWQ and POR pins feature ESD protection without clamping diodes-enabling safe interfacing to host I/Os under backup power domains even when main supply is absent.

Key Specifications

Pinout & Package

Tiny 16-pin 3 mm × 3 mm QFN leadless package with exposed thermal pad (pin 1 = LOWQ, pin 16 = EN2); requires separate SGND and PGND routing per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65023BRSBR and MAX20029ATPA/V+T, the MIC2800-G4SYML-TR uniquely integrates a dedicated LOWQ pin enabling true linear-mode operation with 75 µVRMS noise and backup-power-safe POR/LOWQ I/O-making it the only choice for RF-critical, battery-constrained MPU designs requiring guaranteed sequencing integrity.

Availability

MIC2800-G4SYML-TR is available at Aetrix Electronics and suitable for embedded MPU power, portable wearable systems, low-power RF systems, and backup power systems requiring stable component supply across long-lifecycle industrial programs.

Supply support for MIC2800-G4SYML-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 devices, and power management ICs, serving automotive, industrial, and consumer markets with high-reliability silicon solutions.

The MIC2800 product line is designed specifically for space-constrained, battery-powered embedded systems requiring multi-rail sequencing, ultra-low-noise standby operation, and backup-power-safe host interfacing-targeting ARM-based MPUs and RF-integrated wearables.

FAQ

What is the function of the LOWQ pin on the MIC2800-G4SYML-TR?

The LOWQ pin on the MIC2800-G4SYML-TR is an active-low logic input that selects between two operating modes: when pulled low (<0.2V), it activates LOWQ mode-shutting down the DC/DC PWM stage and enabling a low-noise linear regulator (75 µVRMS, 30 µA IQ); when pulled high (>1.0V), it enables full-power 2 MHz PWM operation (600 mA output). The pin has no clamping diodes to VIN, allowing safe use with backup-power-domain GPIOs.

How does the POR output behave on the MIC2800-G4SYML-TR during power-up?

The POR output on the MIC2800-G4SYML-TR is an open-drain signal that remains low until all enabled outputs (DC/DC, LDO1, LDO2) reach ≥96% of their nominal voltage. Its assertion delay is programmable via the CSET pin capacitor (e.g., 100 nF = 100 ms delay). If any output later drops below 90% nominal, POR immediately goes low and stays low until regulation is restored and the programmed delay expires.

Can the MIC2800-G4SYML-TR power both core and I/O rails of an ARM MPU simultaneously?

Yes-the MIC2800-G4SYML-TR is explicitly designed for this use case: its DC/DC converter supplies the MPU core rail (e.g., 1.1V), LDO1 (fed by DC/DC output) supplies DDR I/O (e.g., 1.8V), and LDO2 (fed directly from VIN) supplies peripheral I/O (e.g., 2.8V). All three outputs maintain <2% accuracy across –40°C to +125°C and support independent enable control via EN1 and EN2.

What is the maximum output current capability of LDO2 on the MIC2800-G4SYML-TR?

LDO2 on the MIC2800-G4SYML-TR delivers up to 300 mA continuous output current when VIN ≥ VOUT + 1.0V. At 300 mA and VOUT ≥ 2.7V, dropout voltage is specified at 142 mV (typical 94 mV). In LOWQ mode, LDO2 current is limited to 10 mA to preserve ultra-low-noise operation-verified in Table 1-4 of the datasheet.

Does the MIC2800-G4SYML-TR require external components for stable operation?

Yes-the MIC2800-G4SYML-TR requires specific external components: a 2.2 µH inductor and ≥2.2 µF ceramic output capacitor on the DC/DC output; ≥2.2 µF ceramic capacitors on LDO1 and LDO2 outputs; a 4.7 µF ceramic bypass capacitor on VIN to PGND; a 0.1 µF capacitor on BIAS to SGND; and a 0.1 µF capacitor on CBYP to SGND for optimal noise performance. These values are validated in the Typical Application Circuit on page 2 of DS20005839B.