Microchip Technology MIC33050-AYHL-TR

Overview

MIC33050-AYHL-TR from Microchip Technology is a 4 MHz synchronous buck DC-DC power module with integrated inductor, delivering up to 600 mA output current at adjustable output voltage (via external resistor divider), operating from 2.7V–5.5V input, featuring HyperLight Load® architecture for ultra-low 20 µA quiescent current and >93% peak efficiency - deployed in space-constrained wearable and USB-powered devices.

For engineers reviewing the MIC33050-AYHL-TR datasheet, MIC33050-AYHL-TR pinout, MIC33050-AYHL-TR application, or MIC33050-AYHL-TR equivalent, key selection criteria include its internal-inductor 12-pin HDFN package, fixed 4 MHz PWM switching, ±2.5% output voltage accuracy, –40°C to +125°C junction temperature range, and compatibility with 2.2 µF ceramic output capacitors.

Technical Context

The MIC33050-AYHL-TR implements a proprietary HyperLight Load® control scheme combining minimum on/off time PFM at light loads (<100 mA) and seamless transition to constant-frequency 4 MHz PWM in continuous conduction mode above ~150 mA. Its internal PMOS/NMOS synchronous switch pair achieves R_DS(ON) of 0.45 Ω (high-side) and 0.5 Ω (low-side), enabling high efficiency across load range without external inductor.

It integrates feedback sensing via FB pin (400 mV reference), feed-forward compensation via CFF pin (560 pF capacitor), soft-start (650 µs), undervoltage lockout (2.55 V typ.), and overtemperature shutdown (165°C). The device separates PGND and AGND paths and requires dedicated bypassing on VIN and OUT pins per layout guidelines.

Key Specifications

Pinout & Package

12-pin 3 mm × 3 mm × 0.9 mm HDFN package with exposed thermal pad (ePAD); RoHS-compliant, Pb-free matte tin finish; land pattern per Microchip DS20006120B-page 15.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable-output buck regulator applications.

Compared with MIC33030-AYHL-TR, the MIC33050-AYHL-TR delivers 2× output current headroom and improved light-load efficiency; versus TPS62840DLCR, it trades external inductor flexibility for guaranteed layout simplicity and smaller total solution size.

Availability

MIC33050-AYHL-TR is available at Aetrix Electronics and suitable for MPU power, wearable devices, USB-powered peripherals, RF modules, and space-constrained MCU systems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for MIC33050-AYHL-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, FPGA, and power management ICs, with global manufacturing and quality certifications including ISO 9001 and IATF 16949.

The MIC33050 product line delivers fully integrated, high-frequency buck modules targeting ultra-compact, battery-sensitive applications where board space, efficiency, and thermal performance are critical constraints.

FAQ

What output voltage range does the MIC33050-AYHL-TR support?

The MIC33050-AYHL-TR is an adjustable-output buck regulator; its output voltage is set externally using a resistor divider connected to the FB pin. Based on the 400 mV internal reference voltage and Equation 4-1 in the datasheet, it supports outputs from approximately 0.4 V up to just below the input voltage (VIN − dropout), typically enabling 0.6 V to 5.0 V ranges with appropriate resistor selection. The MIC33050-AYHL-TR itself imposes no fixed voltage limit beyond its 5.5 V absolute maximum input rating.

Does the MIC33050-AYHL-TR require an external inductor?

No, the MIC33050-AYHL-TR does not require an external inductor. It integrates a power inductor within its 12-pin HDFN package, eliminating the need for external magnetic components and simplifying layout. This integration is a defining feature of the MIC33050 family and is explicitly confirmed in the General Description, Features list, and Functional Block Diagrams of the DS20006120B datasheet for MIC33050-AYHL-TR.

What is the purpose of the CFF pin on the MIC33050-AYHL-TR?

The CFF (feed-forward capacitor) pin on the MIC33050-AYHL-TR connects to the SNS pin via a 560 pF capacitor and injects a derivative term into the control loop to improve transient response. As described in Section 4.6 of the datasheet, this feed-forward path enhances regulation speed during load steps without compromising stability, enabling the MIC33050-AYHL-TR to maintain low output voltage deviation even during rapid 1 mA → 150 mA transients shown in Figure 2-20.

How does the HyperLight Load® architecture benefit the MIC33050-AYHL-TR?

The HyperLight Load® architecture in the MIC33050-AYHL-TR enables simultaneous ultra-low quiescent current (20 µA) and fast transient response by using a minimum on/off time PFM scheme at light loads, avoiding the control-bandwidth sacrifice typical of conventional light-load modes. This allows the MIC33050-AYHL-TR to achieve >85% efficiency at 1 mA while maintaining robust regulation during load steps - a key advantage for always-on wearable and sensor applications.

What thermal considerations apply to the MIC33050-AYHL-TR ePAD?

The exposed thermal pad (ePAD) of the MIC33050-AYHL-TR must be soldered to a solid PGND copper pour to achieve the specified θ_JA of 60°C/W. Per Section 5.0 and Package Outline (page 15), inadequate thermal connection increases junction temperature rise, potentially triggering overtemperature shutdown at 165°C or degrading long-term reliability. Thermal vias under the ePAD are recommended to enhance heat transfer to inner or bottom layers.