MIC5205-3.3YM5 KB33 Low-Noise LDO Regulator SOT23-5

MIC5205-3.3YM5 KB33 Low-Noise LDO Regulator SOT23-5 is an efficient, ultra-low-noise linear voltage regulator designed specifically for battery-powered applications and sensitive RF circuits. This high-performance Low Dropout (LDO) regulator delivers a stable 3.3V output while maintaining an exceptionally low ground current, which significantly extends battery life in portable electronics. Furthermore, its low-noise output and high power supply rejection ratio (PSRR) make it an ideal choice for noise-sensitive analog components. Consequently, engineers often utilize this SOT23-5 packaged device to maintain signal integrity in compact designs. Therefore, you can rely on the MIC5205 to provide clean, reliable power for your high-accuracy sensor modules and communication interfaces.

Key Features:

• Ultra-Low Noise: The device features a specialized bypass pin that allows for further reduction of output noise, making it perfect for RF and audio applications.
• High Output Accuracy: It provides a precise 3.3V output with an initial accuracy of ±1.0%, ensuring consistent performance for sensitive digital logic.
• Very Low Dropout Voltage: Requires only a small voltage differential between input and output, typically 165mV at 150mA, to maintain regulation.
• Enable/Shutdown Control: Includes a logic-compatible enable pin, allowing the system to enter a zero-current shutdown mode to conserve energy.
• Thermal and Current Protection: Features internal current limiting and thermal shutdown circuitry to protect the device from accidental damage during fault conditions.

Technical Specifications:

• Fixed Output Voltage: 3.3 V
• Maximum Input Voltage: 16 V
• Maximum Output Current: 150 mA
• Dropout Voltage: ≈ 165 mV at 150 mA load
• Ground Current: Typically 600 μA at 100 mA load
• Quiescent Current (Shutdown): < 1 μA
• Power Supply Rejection Ratio (PSRR): 75 dB at 100 Hz
• Operating Junction Temperature: −40°C to +125°C

Mechanical Specifications:

• Package Type: SOT-23-5 (Small Outline Transistor)
• Marking Code: KB33
• Mounting Type: Surface Mount Device (SMD/SMT)
• Lead Frame Material: Copper Alloy with Tin Plating

Dimensions:

• Body Length: ≈ 2.90 mm
• Body Width (including leads): ≈ 2.80 mm
• Body Height: ≈ 1.10 mm
• Pin Pitch: 0.95 mm

Pinout and Wiring:

• Pin 1 (IN): Supply Input Voltage. Connect to the unregulated DC source.
• Pin 2 (GND): Ground. Connect to the common circuit ground.
• Pin 3 (EN): Enable Input. Drive high to turn on the regulator; drive low to enter shutdown mode.
• Pin 4 (BYP): Reference Bypass. Connect a small capacitor (typically 470pF) to ground to reduce output noise.
• Pin 5 (OUT): Regulated Output. Provides the stable 3.3V DC supply to your load.

Datasheet Reference:

• Download Microchip MIC5205 LDO Regulator Datasheet

Commonly Used in:

• Cellular Telephones: Providing clean power to oscillators and RF power amplifiers.
• Laptop and Palmtop Computers: Managing power rails for auxiliary peripheral components.
• Battery Powered Equipment: Maximizing runtime through low quiescent current and efficient dropout characteristics.

Applications:

• RF Modems: Ensuring low-noise power for stable wireless data transmission.
• Handheld Instruments: Powering portable medical or scientific tools where space is limited.
• Analog Signal Processing: Serving as a local regulator for high-resolution ADCs and DACs.

Equivalent Models:

• LP2985-33: A common alternative with similar noise characteristics and pinout.
• RT9193-33: A cost-effective high-PSRR LDO often used in consumer electronics.
• AP2127N-3.3: A functionally similar regulator, however, always check the datasheet for specific ESR requirements of output capacitors.

Package Includes:

• 1 x MIC5205-3.3YM5 KB33 Low-Noise LDO Regulator SOT23-5