ZTL432BFTA

Overview

The ZTL432BFTA is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated in the SOT-23 package. It provides an output voltage range from V_REF to 20V, set via external resistors. The device features a reference voltage tolerance of ±0.5% at +25°C and operates within an ambient temperature range of -40°C to +125°C. It supports a cathode current capability from 1mA to 100mA with a typical dynamic output impedance of 0.2Ω.

Feature Summary

• Adjustable output voltage setting between V_REF and 20V using two external divider resistors
• High initial accuracy with 0.5% reference voltage tolerance at +25°C for B grade
• Wide operating temperature range extending from -40°C to +125°C
• Capable of handling sink currents up to 100mA with low dynamic output impedance

Applications

• Opto-coupler linearization
• Linear regulators
• Improved zener diode replacement
• Variable reference circuits

Procurement Notes

Verify that the component matches the specific ZTL432BFTA designation to ensure correct pinout configuration distinct from the ZTL431 series. Confirm the B grade selection aligns with required 0.5% initial tolerance specifications. Ensure the SOT-23 package type meets board layout constraints. Check RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this part when a cost-effective adjustable shunt regulator is needed to replace standard zener diodes for improved performance. The ZTL432 variant offers a different pinout compared to the ZTL431 in the SOT-23 package, which must be considered during PCB design. Choose the B grade specifically for tighter initial voltage tolerance requirements compared to the A grade.

Part Context

This component belongs to the ZTL431/ZTL432 family of adjustable precision shunt regulators produced by Diodes Incorporated. These devices are functionally equivalent to TL431/TL432 types but feature a maximum operation voltage limit of 20V. The family includes various packages such as SOT-23, SOT-23F, SOT25, and SOT363, catering to different space and thermal management needs.

Replacement Considerations

Functionally equivalent to TL431/TL432 except for the maximum operation voltage limitation. Verify pinout compatibility carefully as the ZTL432 differs from the ZTL431 in SOT-23 packaging.