AS1334-SAMPLE

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

The AS1334 is a step-down DC/DC converter designed for portable applications powered by a single Li-Ion battery. It operates from an input voltage range of 2.7V to 5.5V and provides fixed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, and 3.3V. The device delivers a maximum load capability of 650mA with a high switching frequency of 2MHz. It features ultra-low ripple, achieving 2mV output voltage ripple in PWM mode. Efficiency reaches up to 97% at peak and 94% on average. Shutdown supply current is typically 0.01µA.

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

• Fixed-frequency PWM operation minimizes RF interference
• Integrated synchronous rectification reduces power loss
• Includes thermal overload protection and timed current limiting
• Power-OK signal indicates regulation status

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

• Cellular phones
• Hand-held radios
• RF PC cards
• Battery-powered RF devices
• RFID chipsets

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

Verify the specific ordering code suffix (e.g., -12, -15, -18) to confirm the exact fixed output voltage required for the design. Confirm package type is TDFN(3x3) 8-pin. Ensure compatibility with RoHS standards as specified in the datasheet. Check for any specific marking codes associated with the manufacturing week and plant identifier.

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

Select based on the required fixed output voltage among the standard options or request custom steps between 1.2V and 3.4V. Consider the 2MHz switching frequency for minimizing external component size. Evaluate thermal performance if operating near the maximum ambient temperature limit of 85°C. Ensure the selected inductor meets the saturation current requirements for the intended load.

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

The AS1334 belongs to the family of ultra-low ripple step-down DC/DC converters from ams OSRAM (formerly austriamicrosystems). It is optimized for mobile and portable electronics requiring low dropout voltage and high efficiency from a single lithium-ion cell. The device integrates a PFET switch and NFET synchronous rectifier within a compact TDFN package.

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

No direct public substitute part numbers are confirmed in the provided documentation.