HT7533-1

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

The HT7533-1 is a fixed-output low-dropout linear regulator manufactured by UMW. It provides a stable 3.3V output with a maximum continuous current of 100mA. The device supports a high input voltage up to 30V, making it suitable for applications requiring significant voltage headroom. Key electrical specifications include a maximum dropout voltage of 100mV at 1mA and a quiescent current of 3μA or less. The component operates within a temperature range of -25°C to 70°C and features short-circuit protection.

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

• CMOS technology implementation ensures low power consumption and minimal quiescent current draw.
• High input voltage tolerance allows operation from supply rails up to 30V.
• Low dropout characteristic maintains regulation efficiency under varying load conditions.
• Integrated short-circuit protection safeguards the device during fault conditions.

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

• Battery-powered equipment
• Audio/Video equipment
• Communication devices
• Security monitoring systems

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

Verify the manufacturer designation as UMW (United Microelectronics) when sourcing this specific part number. Confirm the package type matches the required PCB footprint, typically SOT-89-3 or SOT-23-3. Ensure the revision level aligns with design requirements. Check RoHS compliance status if environmental regulations apply to the final assembly. Validate that the fixed 3.3V output meets the target circuit's voltage tolerance needs.

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

Select the HT7533-1 when a fixed 3.3V rail is needed with high input voltage capability. The 100mA output current suits moderate load applications. Consider the low quiescent current for battery-operated designs. Verify thermal dissipation capabilities based on the input-output voltage differential and ambient temperature. Compare against other series members if different output voltages are required.

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

This component belongs to the HT75XX series of high-voltage LDO regulators. The series utilizes CMOS processes to achieve low power consumption and high input voltage ratings. Other variants in the family offer different fixed output voltages ranging from 1.5V to 12.0V while maintaining similar current and dropout characteristics.

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

Holtek HT7533-2 offers similar functionality but specifies a maximum input voltage of 24V instead of 30V. Holtek HT7533-3 provides lower quiescent current (1μA typical) with the same 30V input rating. Verify pin compatibility and thermal performance before substituting these alternatives.