HT7333-A

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

The HT7333-A is a positive fixed-output linear regulator from the HT73XX-A series, manufactured by UMW. It provides a stable 3.3V output with a maximum output current of 250mA and an ultra-low quiescent current of 3µA. The device supports a maximum input voltage of 12V and features a low dropout voltage of 90mV at 40mA. Output voltage accuracy is maintained within ±3%, with a temperature coefficient of +0.7 mV/°C. It operates within a temperature range of -25°C to 70°C and is available in SOT-89-3, TO-92, and SOT-23-3 packages.

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

• Ultra-low power consumption with typical quiescent current of 3µA
• High input voltage withstand capacity up to 12V
• Low output voltage temperature drift of 50 ppm/°C
• Built-in low on-state resistance transistor for low dropout voltage

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

• Battery-powered equipment regulated power supply
• Communication equipment stabilized power supply
• Portable medical instruments regulated power supply
• Mobile phone stabilized power supply
• Toys regulated power supply

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

Verify the specific package variant (SOT-89-3, TO-92, or SOT-23-3) required for the design, as the HT7333-A part number covers multiple physical form factors. Confirm that the application environment stays within the specified operating temperature range of -25°C to 70°C. Ensure input voltage does not exceed the 12V maximum rating to prevent damage. Check RoHS3 compliance status if environmental regulations apply to the final product assembly.

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

Select the HT7333-A when a fixed 3.3V rail is needed with minimal static power draw. The 250mA output current capability suits moderate load requirements. Consider the SOT-89-3 package for better thermal dissipation compared to smaller footprints if power loss is significant. Verify that the input voltage remains above the minimum dropout threshold plus 3.3V for proper regulation under all load conditions.

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

The HT7333-A belongs to the HT73XX-A series of LDO linear regulators developed using CMOS technology. This series is characterized by high precision output voltage and low power consumption. It serves as a cost-effective solution for portable electronics requiring stable voltage regulation from higher input sources like batteries or adapters.

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

Other members of the HT73XX-A series offer different fixed output voltages but share similar electrical characteristics. Cross-reference pinouts carefully when substituting between package types such as TO-92, SOT-89-3, and SOT-23-3, as pin assignments may vary.