NEXPERIA Current Regulator, 0.015mA to 50mA Output, 75V Supply, 335mW, SOT-353-

The NEXPERIA Current Regulator (PSSI2021SAY,115) is a versatile, one-chip integrated constant current source designed for precision and reliability. Constructed from a resistor-equipped PNP transistor with two diodes integrated on a single chip, this component provides a stabilised output current ranging from a precise 15μA up to 50mA. The output is easily configured by connecting an external resistor between pins 4 and 5, offering excellent design flexibility.

This regulator is engineered to reduce component count and save valuable board space, making it an ideal solution for compact and efficient electronic designs. It is housed in a Plastic SMD SC-88A (SOT-353) package with 5 leads, suitable for automated surface-mount assembly processes. Its robust construction ensures stable operation across an extensive ambient temperature range from -65°C to +150°C.

Key Features & Specifications

• Integrated Design: A complete constant current source on a single chip, simplifying circuit design.
• Adjustable Output: Set the output current from 15μA to 50mA using a single external resistor.
• High Voltage Capability: Supports a maximum supply voltage of 75V with an output voltage up to 73V.
• Power Handling: Features a maximum power dissipation (Pd) of 335mW.
• Wide Temperature Range: Operates reliably in harsh environments from -65°C to +150°C.
• Compact Footprint: The SOT-353 package is ideal for space-constrained applications.

Primary Applications

This constant current source is suitable for a variety of demanding applications, including automotive electronic systems, where reliability under extreme conditions is critical. It serves excellently as a generic constant current source for biasing and reference circuits, a constant current LED driver for consistent illumination, and for active bias control in audio amplifier