BA17809FP-E2

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

The BA17809FP-E2 is a fixed-output linear voltage regulator from the ROHM BA178xx series, providing a stable 9V DC output. It supports a maximum continuous load current of 1A and operates within an input voltage range of 11.5V to 26V. The device utilizes a surface-mount TO-252-3 (DPAK) package with three pins. Electrical performance includes a line regulation of 15mV and a load regulation of 37mV. It features a typical power supply rejection ratio (PSRR) of 78dB. The component is rated for operation between -40°C and +85°C.

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

• Integrated overcurrent protection circuitry prevents damage during short-circuit or overload conditions.
• Built-in thermal shutdown mechanism automatically disables the output when excessive junction temperatures are detected.
• High ripple rejection capability ensures clean output voltage despite input noise fluctuations.

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

• Power supply sections in consumer electronic devices requiring stable 9V rails
• Industrial control systems utilizing surface-mount topology
• Embedded circuits needing protected linear regulation

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

Verify the specific suffix 'E2' against the manufacturer's latest datasheet to confirm RoHS compliance status and exact pinout configuration. Ensure the ordering part number matches the required TO-252-3 package variant. Cross-reference the manufacturer's official documentation for any recent design changes or obsolescence notices before finalizing procurement specifications.

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

Select this component when a fixed 9V output at up to 1A is required in a compact surface-mount form factor. The TO-252-3 package offers a balance between thermal dissipation and board space efficiency compared to larger through-hole options. Consider the internal protection features for applications prone to transient overloads or thermal stress without external monitoring circuits.

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

This regulator belongs to the BA178xx family, which provides fixed positive output voltages ranging from 2.5V to 24V. The series is designed as a direct replacement for traditional 78xx regulators but in modern surface-mount packages like TO-252-3 and TO-220CP-3. The BA17809FP-E2 specifically targets applications needing 9V regulation with enhanced reliability features integrated into the silicon die.

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

Direct pin-compatible replacements include other BA17809 variants such as the through-hole BA17809CP-E2. Verify that substitute components maintain the same 1A current rating and 9V fixed output specification. Check thermal resistance values if replacing with different package types to ensure adequate heat dissipation.