DI79L09DAB

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

The DI79L09DAB is a negative fixed voltage regulator from Diotec Semiconductor, housed in an SO-8 surface-mount package. It provides a nominal output voltage of -9 V with a tolerance of ±5%, supporting a maximum output current of 100 mA. The device operates within an input voltage range of -24 V to -40 V and features a dropout voltage of 1.7 V. Electrical characteristics include a typical ripple rejection of 45 dB at 120 Hz and a quiescent current of approximately 6.5 mA at elevated temperatures. It functions reliably across a junction temperature range of -40°C to +125°C.

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

• Integrated thermal overload protection safeguards against excessive heat generation during operation.
• Short circuit protection limits internal currents to prevent damage under fault conditions.
• Fixed negative output voltage eliminates the need for external feedback components.

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

• Active SCSI termination regulation
• Post-regulation for switch mode DC-DC converters
• Battery-backed regulated power supplies

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

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm RoHS compliance status and ensure the SO-8 package matches design requirements. Validate that the ordering suffix corresponds to standard commercial grade unless automotive qualification is explicitly required.

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

Select this regulator when a stable negative voltage rail is required for low-current applications. Ensure the input voltage remains within the specified maximum limit to maintain regulation. Consider the thermal resistance values for PCB layout planning to manage heat dissipation effectively within the operating temperature range.

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

This component belongs to the DI79LxxDAB series of negative linear regulators manufactured by Diotec Semiconductor. The series offers various fixed voltage options ranging from -5 V to -24 V in the SO-8 package. It serves as a complement to positive regulator families, providing versatile power management solutions for mixed-polarity electronic systems.

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

Cross-reference with other DI79LxxDAB variants for different voltage outputs. Verify pinout compatibility before substituting with similar negative LDOs from other manufacturers to ensure correct VIN, GND, and VOUT alignment.