ME6211C33M5G-N 3.3V 500mA Low Dropout Regulator IC SOT-23-5

ME6211C33M5G-N 3.3V 500mA Low Dropout Regulator IC SOT-23-5 provides a highly efficient solution for voltage regulation in battery-powered and portable electronics. This high-speed, low-noise CMOS LDO delivers a precise 3.3 V output while maintaining an exceptionally low dropout voltage, even at its full 500 mA load capacity. Furthermore, the device incorporates a high-accuracy voltage reference and an error amplifier to ensure stable power delivery under varying line and load conditions. The integrated enable (EN) function allows designers to shut down the IC to conserve power, reaching a standby current of nearly zero. Consequently, this regulator excels in noise-sensitive applications like RF modules and wireless communication devices. Therefore, you can rely on the ME6211C33M5G-N to provide clean, stable power in space-constrained PCB layouts.

Key Features:

• High Output Current: The IC reliably delivers up to 500 mA, supporting a wide range of microcontrollers and peripheral modules.
• Low Dropout Voltage: It features a typical dropout of only 100 mV at 100 mA, which extends the operating life of battery-driven systems.
• High PSRR: With a Power Supply Rejection Ratio of approximately 70 dB at 1 kHz, it effectively filters out input ripples and noise.
• Built-in Protections: The chip includes integrated thermal shutdown and current limiting circuits to prevent damage during fault conditions.
• Enable Function: A dedicated EN pin provides control over the output state, enabling significant energy savings during idle modes.

Technical Specifications:

• Output Voltage: 3.3 V Fixed
• Maximum Input Voltage: 6.0 V
• Output Current: 500 mA maximum
• Output Voltage Accuracy: ±2%
• Quiescent Current: ≈ 40 μA (Typical)
• Dropout Voltage: ≈ 400 mV at 500 mA load
• Operating Temperature: −40°C to +85°C

Mechanical Specifications:

• Package Type: SOT-23-5 (Small Outline Transistor)
• Mounting Style: Surface Mount Device (SMD/SMT)
• Lead Finish: Lead-free (RoHS Compliant)
• Body Material: Molded Plastic

Dimensions:

• Body Length: ≈ 2.9 mm
• Body Width: ≈ 1.6 mm
• Overall Width (including pins): ≈ 2.8 mm
• Height: ≈ 1.1 mm
• Pin Pitch: 0.95 mm

Pinout and Wiring:

• Pin 1 (VIN): Input supply voltage pin. Connect a 1 μF ceramic capacitor to ground for stability.
• Pin 2 (VSS): Ground pin. Ensure a solid connection to the system ground plane.
• Pin 3 (EN): Enable pin. Drive high (> 1.5 V) for active operation or low (< 0.3 V) for shutdown.
• Pin 4 (NC/BP): No connection or Bypass pin. This pin is often left floating depending on specific board requirements.
• Pin 5 (VOUT): Regulated 3.3 V output. Connect a 1 μF to 10 μF ESR-stable capacitor between this pin and ground.

Datasheet Reference:

• Download Nanjing Micro One ME6211 Series Datasheet

Commonly Used in:

• ESP8266/ESP32 Projects: Providing steady 3.3 V power to Wi-Fi and Bluetooth modules from Li-Po batteries.
• Handheld Instruments: Powering portable multimeters, GPS receivers, and medical monitoring equipment.
• IoT Nodes: Regulating power for low-power sensors and LoRaWAN transmitters.

Applications:

• Battery Powered Systems: Maintaining efficiency as battery voltage drops toward the regulation limit.
• Communication Hardware: Supplying clean power to noise-sensitive RF and analog front-end circuits.
• Post-Regulation: Cleaning up switching regulator outputs to provide a ripple-free supply for ADCs and DACs.

Equivalent Models:

• XC6211 (Torex): A highly similar high-speed LDO with matching pinouts and performance characteristics.
• AP2112K-3.3 (Diodes Inc): However, check current limits as it typically supports up to 600 mA.
• RT9193-33 (Richtek): A popular 300 mA to 500 mA LDO alternative in the same SOT-23-5 footprint.

Package Includes:

• 1 x ME6211C33M5G-N 3.3V 500mA Low Dropout Regulator IC SOT-23-5