ET5H133B

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

The ET5H133B is a linear voltage regulator IC manufactured by ETEK Microelectronics. It provides a fixed positive output voltage of 3.3 V with a maximum output current capability of 150 mA. The device is characterized by high input voltage tolerance and very low quiescent current (IQ). It operates within a minimum temperature range of -40 °C. The component is available in an SOT-89-3 package, suitable for compact power management applications requiring stable DC voltage regulation.

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

• Provides a fixed positive DC output voltage
• Features very low quiescent current consumption
• Supports high input voltage levels
• Designed for reliable operation in low-temperature environments

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

• Battery-powered portable devices
• Low-power embedded systems
• Voltage regulation in mobile electronics

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

Verify the specific package variant, as sources indicate both SOT-23-5 and SOT-89-3 configurations for similar part numbers. Confirm the manufacturer is ETEK Microelectronics. Ensure the output voltage is strictly 3.3 V and polarity is positive. Check datasheet specifications for thermal performance and operating temperature limits before integration.

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

Select this component when a fixed 3.3 V supply is required with minimal standby current draw. The low IQ makes it suitable for battery-operated equipment where efficiency is critical. Ensure the input voltage does not exceed the specified maximum rating for the chosen package type. Verify that the 150 mA load current falls within the device's safe operating area.

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

ETEK Microelectronics specializes in high-performance analog integrated circuits, including power management solutions. The ET5H series represents their line of linear voltage regulators designed for mobile and consumer electronics. This specific model addresses the need for stable voltage regulation with enhanced energy efficiency characteristics.

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

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other 3.3 V LDOs only if electrical parameters and pinouts match exactly.