LM9070S

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

The LM9070S is a 5V, 3% accuracy, 250mA low-dropout linear regulator designed for automotive applications. It features a low-active-low delayed reset output flag to manage microprocessor system resets during power-on and voltage excursions. The device incorporates a unique dual-input logic control scheme with ON/OFF and Keep-Alive inputs, allowing system controllers to maintain operation after ignition shutdown. It provides comprehensive protection including reverse battery, overvoltage shutdown, thermal shutdown, input transient protection, and 60V load dump tolerance.

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

• Dual-input logic control enabling Keep-Alive functionality for post-ignition system management
• External programmable reset delay interval via capacitor for precise microprocessor timing
• High immunity to radio frequency interference ensuring stable operation in noisy environments
• Integrated protection against reverse battery, overvoltage, thermal overload, and short circuits

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

• Automotive microprocessor system power supply
• Engine control units requiring post-ignition power retention
• Vehicle infotainment systems needing reliable startup sequencing
• ECU modules operating in high electromagnetic interference environments

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

Verify the specific suffix 'S' against the manufacturer's official datasheet to confirm package type and temperature grade variations. Ensure the selected variant matches the required automotive reliability standards and pinout compatibility for your PCB layout. Cross-reference ordering information directly with Texas Instruments documentation to avoid discrepancies in electrical specifications or packaging formats.

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

Select this component when designing automotive power architectures that require strict voltage regulation under varying load conditions. The dual-control input feature is essential for systems needing extended power availability after engine shutdown. Consider the low dropout voltage and wide operating temperature range for harsh environment reliability. Verify that the external components for reset delay and RF filtering meet the specified design requirements for optimal performance.

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

The LM9070 series belongs to Texas Instruments' portfolio of automotive-grade low-dropout regulators. These devices are engineered specifically for the demanding electrical and environmental conditions found in modern vehicles. The series emphasizes robustness through integrated protection mechanisms and advanced control features, supporting critical electronic systems that must remain operational during complex power management sequences.

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

Check for direct pin-compatible alternatives within the LM9070 family or similar automotive LDOs from Texas Instruments. Ensure any substitute maintains the same 5V output, 250mA current capability, and dual-input control logic. Verify that replacement parts offer equivalent protection features and RF immunity levels suitable for automotive deployment.