AZ1117IH-3.3TRG1

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

The AZ1117IH-3.3TRG1 is a low dropout linear regulator from Diodes Incorporated, featuring a fixed 3.3V output and SOT223-3 surface mount packaging. It supports up to 1A continuous output current with a typical current limit of 1.35A. 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 maximum dropout voltage of 1.3V at 800mA, a ripple rejection ratio of 70dB at 120Hz, and an output voltage accuracy of ±1%. Quiescent current is limited to 6mA maximum.

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

• Integrated trimmed bandgap reference ensures precise output voltage regulation.
• On-chip thermal shutdown protects against excessive junction temperatures during high load or ambient conditions.
• Compatible with low ESR ceramic capacitors for stable operation.
• Includes built-in current limiting to safeguard the device under fault conditions.

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

• USB devices
• Add-on 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 manufacturer's ordering information. Confirm the package type matches the required PCB layout, specifically the SOT223 form factor. Ensure compliance with RoHS 3 and halogen-free requirements if mandated by project specifications. Cross-reference the datasheet revision to confirm the electrical characteristics align with the intended design constraints.

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

Select this component when a fixed 3.3V rail is required with moderate current demands up to 1A. The industrial temperature rating makes it suitable for environments exceeding standard commercial limits. Consider the 1.3V dropout voltage when calculating the minimum required input voltage headroom. Verify that the application circuit utilizes output capacitors with sufficient low ESR characteristics to maintain stability, as specified in the functional block diagram guidelines.

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

This part belongs to the AZ1117I series, which provides low dropout linear regulation optimized for transient response and minimum input voltage requirements. The series includes various fixed voltage options (1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V) and an adjustable version. The 'I' designation indicates the industrial temperature range variant, distinguishing it from commercial grade parts while sharing similar electrical performance profiles.

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

AZ1117CH-3.3TRG1

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

What is the maximum quiescent current for this regulator?

The maximum quiescent current (IQMAX) is specified as 6mA.

Does the AZ1117IH-3.3TRG1 support ceramic output capacitors?

Yes, the device is compatible with low ESR ceramic capacitors, provided the ESR is less than 20Ω and a minimum of 10µF is used.