Microchip Technology MIC22602YML-TR

Overview

MIC22602YML-TR from Microchip Technology is a 6A synchronous buck regulator IC with integrated high-side P-channel and low-side N-channel MOSFETs, operating at a fixed 1 MHz switching frequency. It delivers adjustable output voltage down to 0.7V from a 2.6V–5.5V input, achieves >95% efficiency across load range, and supports full power sequencing and tracking for multi-rail systems in FPGA and ASIC point-of-load applications.

For engineers reviewing the MIC22602YML-TR datasheet, MIC22602YML-TR pinout, MIC22602YML-TR application, or MIC22602YML-TR equivalent, key selection considerations include its 24-pin 4 mm × 4 mm QFN package, ultra-fast transient response with RC-programmable soft-start, hiccup-mode current limiting, and Power-on-Reset/Power Good open-drain output with delay control.

Technical Context

The MIC22602YML-TR implements a voltage-mode PWM control architecture with internal 1 MHz ramp generator and error amplifier referenced to a 0.7V ±2% feedback threshold. Its dual-MOSFET topology features 30 mΩ P-FET and 25 mΩ N-FET on-resistance, enabling 100% duty cycle operation during input dropout.

Sequencing is enabled via three dedicated pins: EN/DLY (1 μA current-source startup delay), DELAY (1 μA charge/discharge for POR timing), and RC (1 μA programmable slew rate for output voltage ramp-up/down). All support capacitor-based timing with matched rise/fall delays and precise tracking capability across multiple regulators.

Key Specifications

Pinout & Package

Package: 24-pin 4 mm × 4 mm QFN (ML) with exposed thermal pad (EP), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with MP2315DJ-LF-Z and TPS546B24RVFT, the MIC22602YML-TR uniquely integrates analog sequencing primitives (RC, DELAY, EN/DLY) into a compact 4×4 mm QFN-enabling deterministic, component-level multi-rail coordination without firmware or external logic.

Availability

MIC22602YML-TR is available at Aetrix Electronics and suitable for server power delivery, FPGA point-of-load conversion, Blu-ray player subsystems, and industrial base station RF front-end designs requiring stable component supply and long-term production continuity.

Supply support for MIC22602YML-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 global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with emphasis on industrial, automotive, and communications markets.

The MIC22602YML-TR belongs to Microchip's high-density PoL regulator product line, designed specifically for space-constrained, high-transient applications such as FPGA, ASIC, and DDR memory power where analog sequencing, thermal robustness, and 1 MHz efficiency are critical.

FAQ

What is the minimum output voltage supported by the MIC22602YML-TR?

The MIC22602YML-TR supports an adjustable output voltage down to 0.7V, set by an external resistor divider connected to the FB pin. This 0.7V internal reference enables precise regulation for modern low-voltage FPGA cores and ASICs. The MIC22602YML-TR maintains ±2% accuracy over temperature and line/load conditions, ensuring stable operation even at sub-1V levels.

How does the RC pin function in the MIC22602YML-TR?

The RC pin on the MIC22602YML-TR provides a 1 μA current source/sink that controls the slew rate of the output voltage during startup and shutdown. When a capacitor is connected from RC to ground, it programs linear ramp-up/down time (t_RAMP ≈ 0.7 × C_RC), enabling soft-start and precise voltage tracking between multiple MIC22602YML-TR devices. The MIC22602YML-TR requires a minimum 470 pF capacitor on RC and cannot operate with this pin floating.

What thermal management is required for full 6A operation of the MIC22602YML-TR?

For full 6A continuous operation, the MIC22602YML-TR requires its exposed pad (EP) to be soldered to a solid internal ground plane with ≥4 thermal vias (0.3 mm diameter) connecting to inner-layer copper pours. With θ_JA = 40°C/W, ambient temperatures above 60°C require additional airflow or heatsinking. The MIC22602YML-TR incorporates thermal shutdown at 160°C with 20°C hysteresis to protect against sustained overload.

Can the MIC22602YML-TR be used in DDR memory VDD/VTT tracking applications?

Yes-the MIC22602YML-TR supports DDR memory VDD/VTT tracking via its RC pin and POR/PG output. By connecting the RC pin of a secondary MIC22602YML-TR to the SW node of the primary, ratio-metric tracking is achieved. The MIC22602YML-TR's datasheet includes Figure 5-10 showing a validated VDDQ/VTT solution where POR from the first regulator triggers enablement of the second, ensuring synchronized ramp-up within tight voltage tolerances.

What is the purpose of the DELAY pin on the MIC22602YML-TR?

The DELAY pin on the MIC22602YML-TR implements a programmable timeout for the POR/PG signal using a 1 μA internal current source. After the output reaches 90% of its nominal voltage, DELAY begins charging an external capacitor; POR asserts high upon reaching 1.24V. During shutdown, the same capacitor discharges at 1 μA, ensuring matched turn-off delay. This enables "first-up, last-down" sequencing in multi-rail systems without external timers. The MIC22602YML-TR relies on this pin for deterministic power sequencing behavior.