SGM2019 1.2-5V Adjustable Output Voltage Regulator SOT-23-5

SGM2019 Adjustable Output Voltage Regulator is a high-performance, low-dropout (LDO) linear regulator engineered to meet the demanding power requirements of portable and battery-powered devices. This device accepts a wide input voltage range and provides an adjustable output from 1.2V up to 5V, allowing you to fine-tune the power supply for sensitive digital and analog circuitry. Its exceptionally low dropout voltage ensures prolonged battery life, maximizing efficiency even as the input voltage drops. Packaged in a tiny SOT-23-5 footprint, the SGM2019 is the ideal solution when minimizing board space and maximizing power efficiency are paramount for smartphones, medical devices, and wireless communication modules.

Key Features:

• Low Dropout Voltage (LDO): Minimizes power loss and maintains regulation even when the input voltage is very close to the output voltage.
• Adjustable Output: Allows users to set the output voltage from 1.2V to 5V using an external resistor divider network.
• High Output Current: Delivers a robust output current, typically rated for up to 300 mA, suitable for powering various microcontrollers and peripheral ICs.
• Low Quiescent Current: Consumes minimal power during standby or low-load conditions, significantly extending battery runtime in portable applications.
• Integrated Protection: Incorporates over-current protection (OCP) and over-temperature protection (OTP) features to safeguard the device and the load.

Technical Specifications:

• Input Voltage Range (V_IN): 2.5 V to 5.5 V
• Adjustable Output Voltage (V_OUT): 1.2 V to 5.0 V
• Maximum Output Current (I_OUT): 300 mA
• Quiescent Current (I_Q): ≈ 60 μA (Typical)
• Dropout Voltage (V_DO): ≈ 160 mV at 300 mA (Typical)
• Line Regulation: ≈ 0.05%/V

Mechanical Specifications:

• Package Type: SOT-23-5 (Small Outline Transistor)
• Mounting Style: Surface Mount Device (SMD/SMT)
• Operating Temperature Range: -40°C to +85°C

Dimensions:

• Package Length: ≈ 2.9 mm
• Package Width: ≈ 1.6 mm
• Package Height: ≈ 1.1 mm
• Weight: < 0.1 g (Extremely lightweight)

Pinout and Wiring:

• Pin 1 (GND): Connect this pin directly to the system ground.
• Pin 2 (V_IN): Connect the unregulated input voltage (2.5V to 5.5V) here.
• Pin 3 (EN): Chip Enable pin. Pull this high to enable the regulator; pull low to shut down (typical active-high logic).
• Pin 4 (ADJ): Feedback/Adjust pin. Use an external resistor divider from V_OUT to ADJ to GND to set the desired output voltage.
• Pin 5 (V_OUT): The regulated output voltage (1.2V to 5V) is available on this pin.

Datasheet Reference:

• Download SGM2019 LDO Regulator Datasheet

Commonly Used in:

• Wireless Modules: Powering Bluetooth, Wi-Fi, and ZigBee transceivers with clean, stable voltage.
• Digital Cameras and Camcorders: Supplying regulated power to imaging sensors and processors.
• Portable Medical Equipment: Ensuring reliable operation in battery-powered health monitoring devices.

Applications:

• Battery-Powered Devices: Maximizing runtime due to its low quiescent current and low dropout voltage.
• Microcontroller Power Supply: Providing stable voltage for 3.3V or 5V logic ICs from a Li-ion battery source.
• Post-Regulation Filtering: Cleaning up noisy power lines from switching regulators before supplying sensitive analog components.

Equivalent Models:

• LM1117-ADJ: A widely available, but physically larger (SOT-223) LDO with higher dropout voltage.
• AMS1117-ADJ: A generic equivalent to the LM1117-ADJ, often used when space is not critical.
• AP2112K-ADJ: A comparable, high-performance LDO often found in similar compact packages.

Package Includes:

• 1 x SGM2019 Adjustable Output Voltage Regulator (SOT-23-5)