AN79L15

Overview

The AN79L15 is a three-terminal fixed negative output monolithic voltage regulator from the Panasonic AN79Lxx series, designed for applications requiring up to 100 mA of output current. It provides a stabilized -15 V DC output from an unstable input source without external components. The device features a maximum absolute input voltage rating of -35 V and operates within a junction temperature range of -55 °C to +125 °C. Electrical characteristics include a typical line regulation of 200 mV and load regulation of 25 mV under specified conditions.

Feature Summary

• Integrated overcurrent limiting circuit protects against short circuits and overload conditions.
• Built-in thermal overload protection circuit prevents damage during excessive heat generation.
• Requires no external components to achieve stabilized fixed negative output voltage.

Applications

• Power circuits requiring local or on-card regulation
• Elimination of noise associated with single-point regulation
• Distribution problems in electronic equipment power supplies

Procurement Notes

Verify the specific package variant (AN79Lxx vs. AN79LxxM) required for the design, as pin configurations differ between SSIP003-P-0000 and HSIP003-P-0000B packages. Confirm lead-free status if environmental compliance is mandatory, noting that newer package codes indicate lead-free types. Ensure input voltage does not exceed the -35 V absolute maximum rating to prevent device failure.

Selection Notes

Select this component when a fixed -15 V negative rail is needed with currents up to 100 mA. Consider the thermal dissipation capabilities relative to the ambient temperature and board copper area, as the device lacks active cooling mechanisms. Verify that the input voltage remains within the operational range (-18 V to -28 V for regulation) while respecting the -35 V absolute limit. Check if the standard or M-series package fits the PCB layout constraints.

Part Context

The AN79L15 belongs to the AN79Lxx/AN79LxxM series of three-pin negative voltage regulators manufactured by Panasonic Electronic Components. This family offers twelve fixed output voltage options ranging from -4 V to -24 V. The series is engineered for general-purpose power supply applications where compact size and reliability are prioritized, serving as a direct replacement for other industry-standard negative linear regulators.

Replacement Considerations

Cross-reference with L79L15 variants from other manufacturers for pin-compatible alternatives. Verify that substitute devices match the -15 V output, 100 mA current capacity, and -35 V input voltage limits. Ensure the replacement package type aligns with existing footprint requirements.