AP2139AK-1.8TRG1

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

The AP2139AK-1.8TRG1 is a CMOS-based positive voltage regulator IC from Diodes Incorporated, featuring an active high enable circuit with a quick discharge function. It provides a fixed output voltage of 1.8V with ±2% accuracy and supports up to 250mA output current. The device operates within a 2.5V to 6.0V input range and maintains ultra-low quiescent current at 1.0µA typical, dropping to 0.1µA in standby mode. Packaged in SOT-23-5, it ensures stable performance across -40°C to +85°C.

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

• Ultra-low quiescent current consumption for extended battery life
• Logic-controlled enable pin with active quick output discharge capability
• High output voltage accuracy with low dropout characteristics
• Integrated short-circuit protection and thermal shutdown

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

• Battery powered equipment
• Portable AV systems
• Mobile phones
• Communication tools
• Reference voltage sources

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

Verify the component datasheet revision DS37428 Rev. 6-3 to confirm electrical specifications and package dimensions. Ensure compatibility with RoHS 3 and REACH standards before integration. Confirm that the SOT-23-5 package aligns with PCB layout requirements. Check for any specific automotive qualification needs if applicable to the target application environment.

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

Select this LDO when low power consumption and precise voltage regulation are critical for portable devices. The integrated enable feature allows for efficient power management through logic control. Consider the 250mA output capacity against load requirements. Verify input voltage stability within the specified operating range to maintain optimal line regulation performance.

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

This component belongs to the AP2138/2139 series of ultra-low quiescent current CMOS LDO regulators. While the AP2138 lacks an enable pin, the AP2139 variant includes logic-controlled enable functionality with quick discharge. Both share similar electrical characteristics but differ in package options and control features, catering to diverse design constraints.

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

Diodes Incorporated recommends using the AP7354 instead of the AP2138/2139 series for new designs due to obsolescence status.