AS1358-BTTT-28

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

The AS1358-BTTT-28 is a low-dropout linear regulator delivering a fixed 2.8V output with a maximum continuous current of 150mA. It operates from an input voltage range of 2V to 5.5V and achieves a dropout voltage as low as 95mV at full load. The device features ultra-low output noise of 9µVRMS and high power-supply rejection ratio exceeding 80dB up to 10kHz. Quiescent current is maintained at 40µA, dropping below 500nA in shutdown mode. Stability is ensured using only a 1µF ceramic capacitor at the output.

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

• Ultra-low noise architecture providing 9µVRMS output noise for sensitive analog circuits
• Integrated P-channel MOSFET pass transistor enabling extremely low quiescent current consumption
• High power-supply rejection ratio exceeding 80dB across a wide frequency range
• Low dropout voltage performance allowing operation near battery depletion levels

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

• Mobile phones and wireless communication devices
• Bluetooth portable radios and accessories
• Digital cameras and personal audio devices
• Wireless LANs and handheld computers

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

Verify the specific ordering code AS1358-BTTT-28 against manufacturer documentation to confirm the 2.8V preset output and 150mA load rating. Ensure compatibility with TSOT23 5-pin surface mount assembly processes. Confirm RoHS compliance and lead finish specifications prior to integration into production lines.

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

Select this component when designing space-constrained portable systems requiring stable power delivery with minimal noise interference. The 150mA current limit suits moderate load applications, while the low dropout characteristic maximizes battery life. Verify that the required output voltage matches the fixed 2.8V specification, as adjustable variants are not available in this package.

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

This regulator belongs to the AS1358/AS1359 family of ultra-low-noise LDOs designed for mobile and battery-powered electronics. The AS1358 variant specifically provides 150mA output capability compared to the 300mA AS1359. Both share identical pinouts and low-noise characteristics, differing primarily in maximum current handling and thermal dissipation requirements within the compact TSOT23 package.

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

Compatible substitutes include the AS1359-BTTT-28 for higher current demands or other AS1358 series variants with different fixed voltages. Cross-reference tools may identify equivalent regulators, but datasheet verification is required to ensure matching noise, PSRR, and dropout specifications.