AS13985H12-T

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

The AS13985H12-T is a micropower low-dropout (LDO) voltage regulator from ams-OSRAM, delivering a fixed 1.2V output at up to 150mA. It operates within an input supply range of 2.5V to 5.5V and maintains high accuracy with ceramic capacitors between 1µF and 22µF. The device features ultra-low dropout voltage (typically 45mV at full load), low quiescent current (95µA), and shutdown current ≤1µA. Integrated protections include over-current and over-temperature limits. It is housed in a compact 5-pin SOT23 package.

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

• Ultra-low dropout performance ensures stable regulation even under minimal voltage headroom conditions.
• High noise suppression capability allows direct connection to sensitive circuits without additional filtering.
• Integrated thermal and current protection safeguards the device against overload scenarios.
• Guaranteed stability with low-ESR ceramic output capacitors simplifies external component requirements.

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

• Powering mobile phones and PDAs
• Supplying MP3 players and digital cameras
• Battery-powered handheld computers

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

Verify that the specific ordering code matches the required output voltage and package type. Confirm RoHS compliance status through official manufacturer channels. Ensure the design accounts for the specified thermal resistance values for the SOT23 package to prevent thermal shutdown during operation.

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

Select this LDO for applications requiring precise 1.2V regulation from a 2.5V to 5.5V source. Consider the SOT23 package for space-constrained designs. Evaluate the need for bypass capacitor noise reduction if powering RF or analog sections. Verify that the load current does not exceed the 150mA guaranteed limit.

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

This component belongs to the AS13985 series of micropower LDO regulators designed for battery-operated portable electronics. The 'H' suffix indicates the 5-pin SOT23 package variant, while '12' denotes the fixed 1.2V output voltage. The series is engineered for low power consumption and high efficiency in mobile devices.

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

Other variants within the AS13985 family offer different fixed output voltages but share identical pinouts and electrical characteristics. Cross-referencing requires matching the output voltage specification and ensuring the alternative device supports the same input voltage range and load current requirements.

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

What is the maximum operating junction temperature for the AS13985H12-T?

The maximum operating junction temperature is +125°C.

How does the enable pin function affect the device's power state?

Pulling the EN pin logic-high (≥1.2V) enables the output, while pulling it logic-low (≤0.4V) activates automatic sleep mode with shutdown current ≤1µA.