AP2125KS-3.3TRG1 3.3V 300mA Positive Voltage Regulators SC-70-5

AP2125KS-3.3TRG1 Diodes Incorporated 300mA 65dB@(100Hz) 3.3V Positive 6V Voltage Regulators SC-70-5 is a high-performance, low-dropout (LDO) linear voltage regulator. Engineers and designers rely on this fixed 3.3V output regulator to efficiently power noise-sensitive circuits and components, especially in battery-powered devices. Its key strength lies in an exceptional Power Supply Rejection Ratio (PSRR) and low output noise, which ensure a clean and stable power supply for microcontrollers, RF modules, and analog sensors. The device’s compact SC-70-5 package also allows for a small PCB footprint, making it ideal for space-constrained applications.

Key Features:

• Low Dropout Voltage: Requires only 250mV of dropout voltage at a 300mA load, maximizing efficiency in battery-powered designs.
• High PSRR: Offers a high power supply rejection ratio of 65dB at 100Hz, effectively filtering out input voltage ripple and noise.
• Low Quiescent Current: Consumes a very low quiescent current of just 60µA, extending the battery life of portable devices.
• High Output Accuracy: Delivers a precise and stable 3.3V output with ±1.5% accuracy.
• Integrated Protection: Includes built-in over-current protection (OCP) and over-temperature protection (OTP) to safeguard the device and load.
• Enable Pin: A dedicated EN pin allows you to switch the regulator on or off, reducing power consumption to almost zero in standby mode.

Technical Specifications:

• Input Voltage Range: 2.5 V to 6.0 V
• Output Voltage: Fixed 3.3 V
• Output Current: Up to 300 mA
• Dropout Voltage: 250 mV @ 300mA load
• PSRR: 65 dB @ 100 Hz
• Quiescent Current: 60 µA (typical)
• Operating Temperature: −40 °C to +85 °C

Mechanical Specifications:

• Module Type: SC-70-5 Surface-Mount Device (SMD)
• Pin Count: 5 pins
• Assembly: Designed for surface mounting onto a PCB.
• Material: Plastic casing

Dimensions:

• Body Length: ~2.0 mm
• Body Width: ~1.25 mm
• Body Height: ~1.0 mm

Pinout and Wiring:

• VIN: Voltage Input (Connect to your power source)
• GND: Ground
• VOUT: Regulated Voltage Output (3.3V)
• EN: Enable Pin (Drive high for operation, low for shutdown)
• NC: No Connection (This pin is not used)
• Wiring Note: Connect VIN and GND to your power source. Place small ceramic capacitors on both the input and output lines to ensure stability and filter noise.

Datasheet Reference:

• Download the official Diodes Incorporated AP2125 datasheet for complete electrical specifications, characteristic curves, and application details.

Applications:

• Portable Electronics: Ideal for powering battery-operated devices like smartphones and digital cameras.
• RF Modules: Provides a clean power supply for Bluetooth, Wi-Fi, and other wireless modules.
• Analog Circuits: Powers sensitive operational amplifiers and ADC/DAC converters without introducing noise.
• Microcontrollers: Supplies a stable 3.3V rail for microcontrollers and other digital logic.

Equivalent Models:

• LP2985-33: A low-noise LDO from Texas Instruments with similar output current and voltage.
• MCP1700-3302E/TO: A low quiescent current LDO from Microchip, often found in through-hole packages.
• RT9193-33: A similar low-noise LDO from Richtek.

Package Includes:

• 1 x AP2125KS-3.3TRG1 Diodes Incorporated 300mA 65dB@(100Hz) 3.3V Positive 6V Voltage Regulators SC-70-5