MIC29300-3.3BU

series introduction

# Introduction to the MIC29300 - 3.3BU Product Series

## 1. Overview
The MIC29300 - 3.3BU is a part of a high - performance voltage regulator product series designed and manufactured to meet the diverse power management needs of modern electronic devices. This specific model is a low - dropout (LDO) linear voltage regulator, which is well - known for its ability to provide a stable output voltage even when the input voltage is only slightly higher than the desired output voltage.

## 2. Key Features

### 2.1 Low Dropout Voltage
One of the most significant features of the MIC29300 - 3.3BU is its low dropout voltage. Dropout voltage refers to the minimum difference between the input voltage and the output voltage required for the regulator to maintain a stable output. In the case of this device, it can operate with a very small dropout, typically in the range of a few hundred millivolts. This is crucial in battery - powered applications where the battery voltage gradually decreases over time. With a low dropout voltage, the regulator can continue to provide a stable 3.3V output for a longer period as the battery discharges, maximizing the battery's useful life.

### 2.2 High Output Current Capability
The MIC29300 - 3.3BU is capable of delivering a relatively high output current. It can supply up to a specified maximum current, which makes it suitable for powering a wide range of components such as microcontrollers, sensors, and other integrated circuits that require a significant amount of power. This high - current capability ensures that the device can handle the power demands of complex electronic systems without compromising on performance.

### 2.3 Excellent Line and Load Regulation
Line regulation refers to the ability of the regulator to maintain a constant output voltage when the input voltage changes. Load regulation, on the other hand, is the regulator's ability to keep the output voltage stable as the load current varies. The MIC29300 - 3.3BU offers excellent line and load regulation characteristics. This means that regardless of fluctuations in the input voltage or changes in the load current, the output voltage remains within a very tight tolerance, providing a reliable power supply for sensitive electronic components.

### 2.4 Thermal Protection
To prevent damage due to overheating, the MIC29300 - 3.3BU is equipped with thermal protection circuitry. When the device's temperature exceeds a certain threshold, the thermal protection mechanism kicks in and reduces the output current or shuts down the regulator temporarily. This self - protection feature ensures the long - term reliability and durability of the device, especially in high - power or high - temperature environments.

### 2.5 Low Quiescent Current
Quiescent current is the current consumed by the regulator when there is no load connected. The MIC29300 - 3.3BU has a low quiescent current, which is beneficial for battery - powered applications. A low quiescent current means that the regulator itself consumes very little power when the system is in standby or low - power mode, further extending the battery life.

## 3. Applications

### 3.1 Portable Electronic Devices
In portable devices such as smartphones, tablets, and wearable devices, power efficiency and space are of utmost importance. The MIC29300 - 3.3BU's low dropout voltage, low quiescent current, and small form factor make it an ideal choice for powering the various components in these devices. It can provide a stable 3.3V supply to the processor, memory, and other sensitive circuits, ensuring reliable operation while conserving battery power.

### 3.2 Industrial Control Systems
Industrial control systems often require a stable power supply to ensure accurate and

Images for reference

TO-263-3, TS3B

Datasheets

• MIC29150, MIC29300, MIC29500, MIC29750

Partlist