AS1353-28-T

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

The AS1353-28-T is a fixed-voltage linear low-dropout regulator (LDO) manufactured by ams OSRAM. It provides a nominal output voltage of 2.8V 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 reverse-battery protection, over-current limiting, and thermal shutdown circuitry for robust operation. The regulator utilizes a P-channel MOSFET pass transistor to maintain low quiescent current consumption. Standard output voltage accuracy is ±1% at 25°C. The component is housed in a compact 5-pin SOT23 surface-mount package.

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

• Integrated reverse-battery protection disconnects internal circuitry if the battery is connected incorrectly.
• Ultra-low dropout voltage performance ensures efficient power delivery under low differential conditions.
• Built-in thermal overload and over-current protection safeguards against short-circuit and overheating events.
• Active-low shutdown input significantly reduces supply current when the device is not in use.

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

• Powering mobile phones and cordless telephones
• Supplying energy to handheld computers and PDAs
• Operating MP3 players and portable media devices
• Providing regulated voltage for digital cameras

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

Verify the specific ordering suffix and manufacturer part number before procurement to ensure compatibility with existing designs. Confirm that the component meets all required electrical specifications for the target application environment. Check for any updates or revisions to the datasheet that may affect performance parameters. Ensure that the supplier provides valid documentation and traceability records for quality assurance purposes.

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

Select this regulator for applications requiring a stable 2.8V rail from a single-cell lithium-ion or similar battery source. Consider the 150mA current limit when sizing the load requirements. Evaluate the thermal resistance of the PCB layout to manage heat dissipation effectively. Ensure the output capacitor selection adheres to stability requirements specified in the datasheet for reliable operation across the full temperature range.

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

This component belongs to the AS1353/AS1356 family of linear LDO regulators designed for portable electronics. The AS1353 variant specifically includes reverse-battery protection but lacks the Power-OK signal found in the AS1356 series. Both families share identical pinouts and core electrical characteristics, differing primarily in additional monitoring features. The -T suffix indicates tape and reel packaging suitable for automated assembly processes.

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

Consult official cross-reference tools for compatible semiconductor devices. Verify functional equivalence regarding voltage, current, and package dimensions before substitution. Review manufacturer data sheets to confirm parameter matching for critical design constraints.