TL432CPK

Overview

The TL432CPK is a three-terminal adjustable shunt regulator manufactured by Texas Instruments, housed in an SOT-89-3 surface-mount package. It provides a reference voltage range from approximately 2.495 V to 36 V, set via two external resistors. The device features an initial accuracy of 1%, with a typical temperature coefficient of 92 ppm/°C. It operates within a temperature range of -40°C to +125°C and can sink cathode currents from 600 µA to 100 mA. Key electrical characteristics include a low dynamic output impedance and minimal noise, ensuring stable performance across commercial and industrial applications.

Feature Summary

• Three-terminal adjustable shunt regulation architecture
• Wide operating temperature range for industrial environments
• Low output noise and high stability
• Adjustable output voltage capability

Applications

• Precision voltage references
• Programmable power supplies
• Battery-operated equipment
• Voltage regulators

Procurement Notes

Verify the suffix 'CPK' corresponds to the specific accuracy grade and packaging configuration required for your design. Confirm that the component meets RoHS compliance standards if mandated by your project specifications. Ensure proper handling procedures are followed due to moisture sensitivity classification. Cross-reference the datasheet for thermal resistance values relevant to your PCB layout to maintain safe operating temperatures during operation.

Selection Notes

Select the TL432CPK when a precise, adjustable reference voltage is needed in a compact surface-mount form factor. Consider its 1% initial accuracy and wide input voltage range compared to fixed references. Evaluate the thermal management requirements given the SOT-89-3 package size and expected current sinking capabilities. Compare against other TL43x series variants if different accuracy grades or package types better suit the physical constraints of the application.

Part Context

The TL432 series represents a family of programmable shunt regulators widely used in power management circuits. The TL432CPK specifically denotes the version packaged in SOT-89-3 with defined performance parameters. This component serves as a fundamental building block for feedback loops in switching regulators and linear power supplies, offering a cost-effective solution for voltage stabilization tasks.

Replacement Considerations

Compatible substitutes include the TL431ACPK and TL432AIPK, which share similar functional architectures but may differ in accuracy grades or package variations. Verify pinout compatibility and electrical specifications before substitution. Other manufacturers offer equivalent three-terminal shunt regulators, though parameter matching should be strictly validated.