AS1356-25-T

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

The AS1356-25-T is a fixed-voltage linear low-dropout regulator (LDO) from the AS1353/AS1356 series, manufactured by ams OSRAM USA INC. It provides a nominal output voltage of 2.5V with a maximum output current capability of 150mA. The device operates within an input voltage range of 2.5V to 5.5V and features ultra-low dropout characteristics, achieving as low as 40mV at a 100mA load. It incorporates integrated P-channel MOSFET technology for efficient power management and includes comprehensive protection mechanisms such as over-temperature shutdown, over-current limiting, and reverse-battery protection. Additionally, it offers a Power-OK (POK) open-drain output to monitor regulation status.

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

• Integrated Power-OK (POK) circuitry providing active-low indication of out-of-regulation conditions
• Ultra-low dropout performance enabled by internal P-channel MOSFET pass transistor
• Comprehensive protection against thermal overload, output short-circuit, and reverse battery connection
• Low quiescent current consumption with logic-controlled shutdown mode reducing supply current below 1µA

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

• Powering microprocessors in handheld devices
• Supplying cordless and mobile phones
• Powering portable media players such as MP3 and CD/DVD players
• Providing regulated voltage for PDAs and digital cameras

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

Verify the specific ordering suffix '-T' corresponds to the tape and reel delivery form required for your assembly line. Confirm that the '25' designation strictly matches the 2.5V output voltage requirement for your design. Ensure compatibility with the 5-pin SOT23 package dimensions during PCB layout. Cross-reference the manufacturer's latest documentation to confirm current production status and any potential obsolescence notices prior to finalizing procurement plans.

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

Select this component when a fixed 2.5V rail is required with minimal external component count. The AS1356 variant is specifically chosen over the AS1353 when system-level monitoring of the output voltage status via the Power-OK pin is necessary. Ensure the application utilizes ceramic capacitors with low equivalent-series resistance to maintain stability across the full operating temperature range. Consider the thermal dissipation requirements based on the difference between input and output voltages at the expected load current.

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

This part belongs to the AS1353/AS1356 family of high-performance linear LDOs designed for battery-powered applications. The series is characterized by its ability to deliver superior performance under low dropout conditions using an integrated P-channel MOSFET. While the AS1353 lacks the Power-OK feature, the AS1356 adds this diagnostic capability without altering the core regulation architecture or physical footprint, maintaining compatibility with standard 5-pin SOT23 designs.

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

Public confirmed substitute part numbers are not available in the provided source material.