L4936N

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

The L4936N is a dual multifunction voltage regulator designed for microcomputer-controlled systems, particularly in automotive applications. It features two very low dropout outputs: Output 1 provides a precision 5V standby supply with 50mA current capability, while Output 2 offers a tracked output adjustable from 5V to 20V with 500mA capacity. The device operates with a maximum DC supply voltage of 25V and withstands transient voltages up to 40V. Key auxiliary functions include a power-on reset circuit with delay defined by an external capacitor, an early warning sense output for undervoltage, thermal shutdown, and short-circuit protection.

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

• Dual low-dropout regulators providing a fixed 5V standby output and a programmable tracked output
• Integrated power-on reset circuit with externally adjustable delay time
• Input voltage sensing comparator for early undervoltage warnings
• Built-in thermal shutdown and short-circuit protection mechanisms

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

• Microprocessor system power supplies in automotive environments
• Standby voltage regulation for control units
• Programmable secondary voltage generation for peripheral circuits

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

Verify component status as the L4936N is listed as obsolete. Confirm package availability in Multiwatt-11 format. Ensure design reviews account for end-of-life status when planning long-term production. Check for valid cross-reference substitutes if continuous supply is required for new manufacturing runs.

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

Select this component for designs requiring a stable 5V rail alongside a higher current, adjustable secondary rail. The tracking feature simplifies biasing requirements for downstream logic. Verify that input voltage transients remain within the 40V limit. Ensure adequate thermal management due to the through-hole Multiwatt-11 package constraints.

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

Part of the L4936 family of dual voltage regulators. The 'N' suffix denotes the Multiwatt-11 package variant, distinct from the Multiwatt-15 'NH' version. Designed specifically for robust operation in electrically noisy automotive environments where transient voltage spikes are common.

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

L4936NH (Multiwatt-15 package)