AZ1117IH-1.8TRG1

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

The AZ1117IH-1.8TRG1 is a low dropout linear regulator from the AZ1117I series, manufactured by Diodes Incorporated. It provides a fixed 1.8V output with a maximum continuous current of 1A. The device operates within an industrial junction temperature range of -40°C to +125°C and accepts input voltages up to 15V. Key electrical specifications include a typical dropout voltage of 1.2V at 0.8A for the SOT223 package, a ripple rejection ratio of 70dB at 120Hz, and a maximum quiescent current of 6mA. It features a trimmed bandgap reference ensuring ±1% output voltage accuracy.

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

• Integrated thermal shutdown protection prevents damage during high current or elevated ambient temperature conditions.
• Built-in current limiting safeguards the device and load against short circuits and overloads.
• Optimized for compatibility with low ESR ceramic capacitors to ensure stability.
• Delivers precise output voltage regulation through a calibrated internal bandgap reference.

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

• USB peripheral devices
• Add-on expansion cards
• DVD players
• PC motherboards

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

Verify that the specific suffix 'H' in the part number corresponds to the industrial temperature grade (-40°C to +125°C) as defined in the official ordering information table. Confirm the package type matches the required footprint, as this model utilizes the SOT223 carrier. Ensure compliance with RoHS 3 and halogen-free requirements if mandated by the target assembly standards.

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

Select this component when a stable 1.8V rail is required for industrial environments. The device supports input voltages up to 15V, making it suitable for systems with higher supply rails. Designers must account for the specified dropout voltage under expected load currents to maintain regulation. Verify that the application circuit includes the minimum recommended output capacitance to prevent oscillation.

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

This component belongs to the AZ1117I family of low dropout regulators designed for industrial applications. The series offers various fixed output voltages and an adjustable version. While other variants like the AZ1117C exist for commercial temperatures, the 'I' designation specifically denotes the extended operating range required for harsher environmental conditions.

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

Diodes Incorporated recommends the AZ1117ID-1.8TRG1 as a manufacturer-recommended alternative for legacy ZLDO1117 parts. When substituting, verify that the pinout and package dimensions are compatible with the existing PCB layout.

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

What is the maximum input voltage allowed for the AZ1117IH-1.8TRG1?

The absolute maximum rating for the input voltage is 18V, though the recommended operating condition specifies a maximum of 15V.

Does the AZ1117IH-1.8TRG1 require external resistors for its fixed output?

No, the fixed output versions integrate the adjust resistors internally. External resistors are only required for the adjustable (ADJ) version of the series.

How does the device protect against overheating?

The device incorporates on-chip thermal shutdown circuitry that activates at approximately 160°C to disconnect the output and prevent excessive junction temperature.