AS13986-1833-T

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

The AS13986-1833-T is a dual low-dropout linear regulator manufactured by ams OSRAM. It provides fixed output voltages of 1.8V and 3.3V, each capable of delivering up to 150mA. The device operates with an input voltage range of 2.5V to 5.5V. Key electrical characteristics include a typical quiescent current of 135µA at no load and 255µA at full load. Output noise is specified at 30µVRMS within the 10Hz to 100kHz bandwidth. Supply voltage rejection ratios are 55dB at 1kHz and 50dB at 10kHz. The unit features logic-controlled shutdown, thermal overload protection, and current limiting.

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

• Dual independent outputs with integrated logic-controlled enable/disable functions for power management
• Ultra-low dropout voltage performance optimized for battery-operated applications
• Low noise architecture suitable for sensitive analog and RF circuitry
• Integrated short-circuit and thermal overload protection mechanisms

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

• Powering cordless and mobile phones
• MP3 players and digital audio devices
• PDAs and handheld computers
• Digital cameras and other portable consumer electronics

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

Verify the specific ordering code AS13986-1833-T against the manufacturer's official documentation to confirm the fixed 1.8V and 3.3V output configuration. Ensure compatibility with the required 8-pin WLP package dimensions and soldering profiles. Confirm that the application environment remains within the specified -40°C to +125°C operating temperature range. Check for any updated revision notices or errata sheets prior to final design implementation.

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

Select this component when designing systems requiring two distinct regulated rails from a single source with minimal footprint. The 8-pin WLP package offers space efficiency for dense PCB layouts. Consider the low quiescent current for extended battery life in portable devices. Verify that the external ceramic capacitors meet the specified ESR requirements for stability. Evaluate the thermal dissipation capabilities based on the expected load currents and ambient temperatures.

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

This part belongs to the AS13986 family of dual LDO regulators designed for low-power, battery-operated applications. The series emphasizes ultra-low dropout voltage and low noise characteristics. Other variants in the family offer different fixed output voltage combinations while maintaining the same core functionality and package style. The device is intended for use in portable consumer electronics where power efficiency and size are critical constraints.

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

Consult the manufacturer's cross-reference tools for compatible alternatives. Verify pinout compatibility and electrical specifications before substitution. Ensure that any replacement device meets the same package and thermal requirements.

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

What is the recommended bypass capacitor value for the AS13986?

A 0.01µF capacitor should be connected between the BYPASS pin and GND to minimize output noise and prevent overshoot during startup.

How does the AS13986 handle thermal overload conditions?

When the junction temperature exceeds +160°C, internal thermal protection shuts down the pass transistors. The device resumes operation once the temperature cools by approximately 20°C.

Can the AS13986 operate with low-ESR ceramic capacitors?

Yes, the device is specifically designed to be stable with low-ESR ceramic capacitors in the 1µF to 22µF range with an ESR between 0.005Ω and 5Ω.