AS1362-BTTT-33

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

The AS1362-BTTT-33 is a 300mA ultra-low-noise low-dropout linear regulator (LDO) with a fixed 3.3V output, manufactured by ams OSRAM USA INC. It operates within an input voltage range of 2V to 5.5V and delivers up to 300mA continuous current with a typical dropout voltage of 140mV at full load. The device features an integrated P-channel MOSFET pass transistor, achieving a quiescent current of 40µA and output noise of 9µVRMS. It includes a power-ok open-drain output, shutdown logic, overcurrent protection, and thermal shutdown, housed in a TSOT23 6-pin package.

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

• Ultra-low noise performance with 9µVRMS output noise for sensitive analog circuits
• Integrated active-low power-ok indicator for monitoring regulated output status
• Low quiescent current consumption with deep shutdown mode reducing drain below 500nA
• Robust protection mechanisms including overcurrent limiting and thermal shutdown

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
• Battery-powered handheld computers and PDAs

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

Verify the specific ordering code AS1362-BTTT-33 against the manufacturer's latest datasheet revision to confirm availability and compliance status. Ensure that the required 1µF ceramic output capacitor and 10nF bypass capacitor are included in the design, as stability depends on these external components. Confirm that the application environment remains within the specified -40°C to +85°C operating temperature range.

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

Select this component when a stable 3.3V supply is required for space-constrained portable electronics. The 300mA output capability supports high-current loads such as RF transceivers or camera flashes. Its compatibility with small-value ceramic capacitors simplifies PCB layout compared to LDOs requiring tantalum or electrolytic outputs. The low dropout characteristic maximizes battery life by allowing operation closer to the cell's discharge cutoff voltage.

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

This part belongs to the AS1361/AS1362 family of ultra-low-noise LDOs from ams OSRAM. While the AS1361 variant provides 150mA, the AS1362 offers double the current capacity at 300mA. Both share identical pinouts, package types, and noise specifications, differing primarily in maximum load current and internal current limit thresholds. This family targets mobile and wearable applications where power efficiency and signal integrity are critical.

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

Direct functional substitutes within the same series include the AS1362-BTTT-30 (3.0V output) or AS1362-BTTT-33 if different output voltages are acceptable. Cross-referencing with other 300mA LDOs requires verifying pin compatibility, PSRR performance, and capacitor requirements, as architectural differences may impact transient response and stability.

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

What is the minimum capacitance required for stable operation?

The device requires only a 1µF ceramic capacitor at both the input and output pins for stability across any load condition.

How does the shutdown function affect power consumption?

Driving the SHDNN pin low disables the internal reference and pass transistor, reducing supply current to less than 500nA.

What is the purpose of the BYPASS pin?

Connecting a 10nF capacitor between the BYPASS pin and the OUT pin reduces output voltage noise to 9µVRMS.