Microchip Technology MIC23051-16YML-TR

Overview

MIC23051-16YML-TR from Microchip Technology is a 4 MHz synchronous buck (step-down) DC-DC regulator with HyperLight Load® architecture, delivering up to 600 mA output current at fixed dual-voltage scaling (1.15 V / 1.40 V), 20 µA typical quiescent current, and >93% peak efficiency - deployed in portable wireless modules requiring ultra-low standby power and fast load transient response.

For engineers reviewing the MIC23051-16YML-TR datasheet, MIC23051-16YML-TR pinout, MIC23051-16YML-TR application, or MIC23051-16YML-TR equivalent, key selection criteria include voltage scaling control via VSC pin, 2 mm × 2 mm DFN package constraints, HyperLight Load® light-load efficiency behavior, and compatibility with 0.47–2.2 µH inductors and 2.2 µF ceramic output capacitors.

Technical Context

The MIC23051-16YML-TR implements a proprietary minimum on-time/off-time control loop enabling pulse-frequency modulation (PFM) in HyperLight Load® mode below ~100 mA and seamless transition to constant-frequency 4 MHz PWM operation above that threshold. It integrates PMOS/NMOS synchronous switches with R_DS(ON) of 0.45 Ω (PMOS) and 0.5 Ω (NMOS) and uses feed-forward compensation via a 560 pF capacitor on the CFF pin referenced to 0.72 V internal reference.

Voltage scaling is implemented through the VSC pin, which toggles regulated output between 1.15 V (VSC low) and 1.40 V (VSC high) with 0.5–1.2 V logic thresholds and 20 mV hysteresis. The device features undervoltage lockout (2.55 V typ.), soft-start (650 µs), overtemperature shutdown (165 °C), and separate AGND/PGND paths for noise isolation.

Key Specifications

Pinout & Package

Package: 8-pin 2 mm × 2 mm DFN with exposed thermal pad (EP), RoHS-compliant, –40°C to +125°C junction temperature rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62840DLCR and RT7290AZSP, the MIC23051-16YML-TR uniquely delivers hardware-controlled dual-output voltage scaling (1.15 V / 1.40 V) with sub-800 µs transition and 25 mV_PP ripple in light-load mode - making it optimal for DVFS-enabled portable RF systems where both efficiency and dynamic response are critical.

Availability

MIC23051-16YML-TR is available at Aetrix Electronics and suitable for cellular modem power, Wi-Fi/BT coexistence modules, USB-powered sensor hubs, and industrial portable data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MIC23051-16YML-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, with a focus on embedded control and energy-efficient solutions.

The MIC23051 product line delivers high-efficiency, small-footprint synchronous buck regulators with patented HyperLight Load® technology - designed specifically for battery-powered portable electronics requiring dynamic voltage scaling and ultra-low quiescent current.

FAQ

What is the exact output voltage configuration of the MIC23051-16YML-TR?

The MIC23051-16YML-TR provides two fixed output voltages controlled by the VSC pin: 1.15 V when VSC is logic low (0.5–1.2 V), and 1.40 V when VSC is logic high (0.5–1.2 V). This dual-voltage capability is factory-trimmed and does not require external resistive feedback networks - confirmed in Microchip DS20006471A, Table 5-1 and page 17 product identification system.

Does the MIC23051-16YML-TR support true 4 MHz operation across its full temperature and load range?

Yes, the MIC23051-16YML-TR maintains 4 MHz nominal switching frequency in PWM mode across –40°C to +125°C junction temperature and loads ≥100 mA, as verified in Electrical Characteristics (Table 1-1, f_SW) and Figure 2-6. At lighter loads, it enters HyperLight Load® PFM mode with variable frequency, but transitions seamlessly back to 4 MHz upon load increase.

How does the MIC23051-16YML-TR achieve 25 mV_PP output ripple in HyperLight Load® mode?

The MIC23051-16YML-TR achieves 25 mV_PP ripple in HyperLight Load® mode through its proprietary minimum on-time/off-time control architecture combined with feed-forward compensation via the CFF pin (560 pF capacitor to SNS). This scheme minimizes output capacitor discharge between pulses while avoiding large bulk capacitance - detailed in Section 4.6 and Figure 2-20/2-21 of DS20006471A.

Can the MIC23051-16YML-TR operate with a 0.47 µH inductor, and what is the impact on performance?

Yes, the MIC23051-16YML-TR is fully specified for 0.47–2.2 µH inductors. Using 0.47 µH improves transient response (reducing output droop during load steps) but increases peak inductor current and may raise RMS losses - as shown in Equation 4-1. Efficiency remains >90% at 200 mA with 0.47 µH per Figure 4-1, provided DCR is ≤30 mΩ.

What is the recommended PCB layout practice for the AGND and PGND pins of the MIC23051-16YML-TR?

Per DS20006471A Section 3.7–3.8, AGND and PGND must be routed as separate ground planes joined at a single point near the IC's ground pins (pins 6 and 8), with PGND handling high-current switching loops (VIN–SW–PGND) and AGND serving low-noise analog circuits (SNS, CFF, EN, VSC). The exposed thermal pad (EP) must connect to PGND via ≥4 thermal vias to ensure thermal integrity and low-impedance grounding.