This part is a kind of semiconductor called ADR03.
Function of this product has Ultracompact Precision10 V/5 V/2.5 V/3.0 V Voltage References.
Manufacturers : Analog Devices
Image and pinout :
Some of the text within the PDF file :
Ultracompact Precision 10 V/5 V/2.5 V/3.0 V Voltage References ADR01/ADR02/ADR03/ADR06 FEATURES Ultracompact SC70-5/TSOT-5 Low temperature coefficient SOIC-8: 3 ppm/°C SC70-5/TSOT-5: 9 ppm/°C Initial accuracy ± 0.1% No external capacitor required Low noise 10 µV p-p (0.1 Hz to 10 Hz) Wide operating range ADR01: 12 V to 40 V ADR02: 7 V to 40 V ADR03: 4.5 V to 40 V ADR06: 5.0 V to 40 V High output current 10 mA Wide temperature range: –40°C to +125°C ADR01/ADR02/ADR03 pin compatible to industry-standard REF01/REF02/REF031 PIN CONFIGURATIONS TEMP 1 GND 2 VIN 3 TOP VIEW 4 VOUT (Not to Scale) Figure 1. 5-Lead SC70/TSOT Surface-Mount Packages TP 1 VIN 2 TEMP 3 GND 4 ADR01/ ADR02/ ADR03/ ADR06 8 TP 7 NIC 6 VOUT NIC = NO INTERNAL CONNECT TP = TEST PIN (DO NOT CONNECT) Figure 2. 8- [ ... ]