Microchip Technology MIC33M650YMP-TR

Overview

MIC33M650YMP-TR from Microchip Technology is a pin-selectable, synchronous step-down power module integrating MOSFETs and inductor, delivering 6A output at up to 95% efficiency with ±1.5% output voltage accuracy over line/load/temperature. It operates from 2.4V–5.5V input, supports nine fixed output voltages (0.6V–3.3V) via VSEL1/VSEL2 tri-state logic, and features Power Good (PG), output discharge, and latch-off thermal/current protection. It is used in FPGA, ASIC, and SSD power rails requiring compact, high-efficiency point-of-load regulation.

For engineers reviewing the MIC33M650YMP-TR datasheet, MIC33M650YMP-TR pinout, MIC33M650YMP-TR application, or MIC33M650YMP-TR equivalent, this page delivers verified technical context, validated pin functions, confirmed nine-voltage selection mapping, real-world transient response data, and two rigorously cross-checked alternative parts for FPGA/SSD power design.

Technical Context

The MIC33M650YMP-TR uses Constant-On-Time (COT) control with adaptive on-time modulation, enabling stable ~1.2 MHz switching at 1.0V output and ultra-fast load transient response. Its HyperLight Load® mode dynamically reduces average switching frequency under light loads to maintain high efficiency without compromising regulation.

It implements dual-path current limiting-8–12 A high-side and 8 A low-side MOSFET limits-with hiccup-mode short-circuit protection (8 cycles before restart). Thermal shutdown latches at +165°C with +22°C hysteresis, and undervoltage lockout activates at 2.225 V (±153 mV hysteresis) on SVIN.

Key Specifications

Pinout & Package

Package: 53-lead, 6 mm × 10 mm × 3 mm B1QFN with exposed thermal pads (EP_OUT, EP_SW, EP_PGND, EP_PVIN) for enhanced thermal performance and PCB-level heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MIC33M650YMP-TR, MIC33M656YMP-TR adds programmability at the cost of firmware dependency, while TPS546B24RVFT trades integration for lower unit cost and external component flexibility - making MIC33M650YMP-TR optimal for fixed-voltage, high-density, high-accuracy POL needs.

Availability

MIC33M650YMP-TR is available at Aetrix Electronics and suitable for FPGA core power, SSD controller rails, and portable Li-ion system rails requiring stable component supply, full production traceability, and long-term lifecycle support.

Supply support for MIC33M650YMP-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, FPGA, and power management semiconductors, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200 for select products.

The MIC33M series targets high-density, high-efficiency point-of-load regulation for FPGA, ASIC, and SSD applications - emphasizing integration, accuracy, and thermal performance in compact QFN modules.

FAQ

What output voltages does the MIC33M650YMP-TR support, and how are they selected?

The MIC33M650YMP-TR supports nine fixed output voltages: 0.6V, 0.8V, 0.9V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. Selection is achieved using tri-state logic on VSEL1 (Pin 48) and VSEL2 (Pin 45), which accept High, Low, or Floating states - no external resistors required. The exact mapping is defined in Table 4-1 of the datasheet, and each combination yields a specific, factory-trimmed output voltage with ±1.5% total accuracy.

Does the MIC33M650YMP-TR require an external inductor?

No, the MIC33M650YMP-TR integrates the power inductor internally within its 53-lead B1QFN package. This eliminates the need for external magnetics, reduces solution size by >40%, and removes inductor selection, placement, and EMI tuning variables. Only input and output capacitors (e.g., 2×47 µF at output) and minimal passive filtering are required for full operation.

How does the MIC33M650YMP-TR handle startup into a pre-biased output?

The MIC33M650YMP-TR supports safe start-up into a pre-biased output voltage - a critical feature for multi-rail systems and hot-swap applications. Its control architecture prevents reverse current flow and ensures monotonic rise of VOUT even when the output capacitor is initially charged. Figure 2-17 in the datasheet confirms stable behavior with 0.8V pre-bias, enabled by internal gate drive timing and current-limit management.

What is the purpose of the VOUT pin on the MIC33M650YMP-TR, and how should it be connected?

The VOUT pin (Pin 51) is the remote sense input for closed-loop regulation. It must be connected directly to the load-side of the output capacitor - as close as possible to the point-of-load - to compensate for PCB trace resistance and ensure ±1.5% accuracy. Additionally, this pin enables the internal 10 Ω discharge path when EN is low, actively pulling the output to ground during shutdown to prevent undefined startup conditions.

Can the MIC33M650YMP-TR operate with input voltage equal to the output voltage?

Yes, the MIC33M650YMP-TR supports 100% duty cycle operation, enabling low-dropout regulation when VIN approaches VOUT. When the required duty cycle exceeds ~92%, the high-side MOSFET latches on until VOUT falls 4% below regulation, allowing operation down to VIN = VOUT + (R_DS(on) × I_OUT). This extends usable battery life in single-cell Li-ion systems where input drops to 3.0V while powering a 2.5V or 3.3V rail.