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PSSI2021SAY - Constant current source

General Description

Resistor-equipped PNP transistor with two diodes on one chip in a SOT353 (SC-88A) plastic package.

Stabilized output current of between 15 µA and 50 mA by connection of an external resistor between pins 4 and 5.

Key Features

  • I One chip integrated constant current source I Output current setting by use of an external resistor I Very small package I Reduces component count and board space 1.3.

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PSSI2021SAY Constant current source in SOT353 package Rev. 03 — 27 August 2009 Product data sheet 1. Product profile 1.1 General description Resistor-equipped PNP transistor with two diodes on one chip in a SOT353 (SC-88A) plastic package. Stabilized output current of between 15 µA and 50 mA by connection of an external resistor between pins 4 and 5. 1.2 Features I One chip integrated constant current source I Output current setting by use of an external resistor I Very small package I Reduces component count and board space 1.3 Applications I Automotive applications I Generic constant current source I Constant current LED driver I Active bias control for audio amplifiers 1.4 Quick reference data Table 1.