This post explains for the regualtor.

The Part Number is 7133-1.

The function of this semiconductor is 30mA. Low Power LDO. ( Linear & low-dropout )

The package is TO-92, SOT-89 and SOT-25.

Manufacturer: Holtek

Preview images :

Description

This is 30mA Low Power LDO. The 7133-1 is a set of three-terminal low power high voltage regulators implemented in CMOS technology. They allow input voltages as high as 24V.

They are available with several fixed output voltages ranging from 3.0V to 5.0V. CMOS technology ensures low voltage drop and low quiescent current.

Features

1. Low power consumption

2. Low voltage drop

3. Low temperature coefficient

4. High input voltage (up to +18V)

5. Output voltage accuracy: tolerance ±2%

Low-power LDOs are commonly used in applications where energy efficiency is crucial, such as battery-powered devices, wearables, sensor nodes, and portable electronics. They help extend battery life and maintain a stable voltage supply for low-power components and microcontrollers.

Applications:

1. Battery-powered equipment

2. Communication equipment

3. Audio/Video equipment

7133-1 PDF Datasheet

This post explains for the regulator.

The Part Number is MAA723 ( = LM723 ).

The function of this semiconductor is Voltage Regulator.

Manufacturer: Tesla

Image

Description

The MAA723 is a voltage regulator designed primarily for series regulator applications. By itself, it will supply output currents up to 150 mA; but external transistors can be added to provide any desired load current. The circuit features extremely low standby current drain, and provision is made for either linear or foldback current limiting.

A voltage regulator is an electronic device that is used to maintain a constant voltage level, regardless of changes in load or input voltage.

Block Diagram

Features:

1. 150 mA output current without external pass transistor

2. Output currents in excess of 10A possible by adding external transistors

3. Input voltage 40V max

4. Output voltage adjustable from 2V to 37V

MAA723 PDF Datasheet

 

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