BA17809T

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The BA17809T is a fixed positive linear voltage regulator from the ROHM BA178xx series, delivering a nominal output of 9 V with a maximum continuous current capability of 1 A. It utilizes a TO-220FP (TO-220 Full-Power) three-pin through-hole package designed for robust thermal management. The device operates within an input voltage range of 11.5 V to 26 V and maintains functionality across an extended temperature range from -40 °C to +85 °C. Key electrical specifications include a line regulation of 240 mV and load regulation of 240 mV, ensuring stable performance under varying supply and load conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated overcurrent protection circuitry prevents damage during short-circuit or overload events.
• Built-in thermal shutdown mechanism automatically disables the output when internal junction temperatures exceed safe limits.
• High ripple rejection characteristics ensure clean DC output by effectively suppressing power supply noise.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• General-purpose power supply units requiring regulated 9 V DC rails
• Industrial control systems operating in wide ambient temperature environments
• Embedded electronic circuits needing reliable linear voltage regulation

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify component authenticity against official ROHM documentation prior to integration. Confirm that the specific part number matches the required pinout and thermal specifications for your PCB layout. Ensure compliance with RoHS directives if applicable to your manufacturing standards. Review the latest datasheet for any updates regarding handling precautions or testing procedures.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 9 V output at up to 1 A is required with high reliability. The TO-220FP package offers superior heat dissipation compared to smaller surface-mount alternatives. Consider the input voltage headroom necessary to maintain regulation and minimize power dissipation. Evaluate thermal resistance requirements based on the expected ambient temperature and enclosure constraints.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This regulator belongs to the BA178xx family, which provides standard fixed-output voltages similar to traditional 78xx series devices but with enhanced performance metrics from ROHM. The BA17809T specifically targets applications demanding robust linear regulation with integrated safety features. It serves as a direct replacement for legacy components in designs prioritizing stability and protection.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

BA17809CP-E2: Pin-compatible alternative in a different package configuration. BD80FC0WFP-E2: Manufacturer-recommended modern substitute offering improved efficiency.