
Allicdata Part #: | UA78L05CDRE4-ND |
Manufacturer Part#: |
UA78L05CDRE4 |
Price: | $ 0.09 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Texas Instruments |
Short Description: | IC REG LINEAR 5V 100MA 8SOIC |
More Detail: | Linear Voltage Regulator IC Positive Fixed 1 Outpu... |
DataSheet: | ![]() |
Quantity: | 1000 |
5000 +: | $ 0.08105 |
Voltage Dropout (Max): | 1.7V @ 40mA |
Base Part Number: | UA78L05 |
Supplier Device Package: | 8-SOIC |
Package / Case: | 8-SOIC (0.154", 3.90mm Width) |
Mounting Type: | Surface Mount |
Operating Temperature: | 0°C ~ 125°C |
Protection Features: | Over Current, Over Temperature, Reverse Polarity, Short Circuit |
Control Features: | -- |
PSRR: | 49dB (120Hz) |
Current - Output: | 100mA |
Series: | -- |
Voltage - Output (Max): | -- |
Voltage - Output (Min/Fixed): | 5V |
Voltage - Input (Max): | 20V |
Number of Regulators: | 1 |
Output Type: | Fixed |
Output Configuration: | Positive |
Part Status: | Active |
Packaging: | Tape & Reel (TR) |
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The UA78L05CDRE4 is a Low Dropout (LDO) 3-Terminal Positive Regulator designed to provide a regulated output using only a single external resistor to set the output voltage. The device is rated as 5V/100mA output, featuring a guaranteed maximum dropout voltage at 1.3V at 100mA load. The regulator offers excellent line and load regulation and can supply the local on-card regulation required in small, low supply current systems or distributed power buses.
Application Field
The UA78L05CDRE4 is specifically designed for consumer electronics as well as automotive applications. It is perfect for systems that require adjustable or fixed output voltage levels. In addition, it can be used for local on-card regulation for small, low supply current systems. Other applications include:
- Rechargeable Battery Packs
- DC Motor Control
- Power Supplies and Inverters
- Telephony Applications
- Digital Set-top Boxes
- Portable Consumer and Computer Products
- Power Management
Working Principle
The UA78L05CDRE4 is a 3-terminal device that utilizes an LM78-type regulator architecture. It has one input terminal, one output terminal and a ground terminal for current return. The device can be used in fixed voltage output applications, as well as in adjustable voltage output applications where a voltage reference is used to establish the output voltage. The maximum output current is 100mA and the dropout voltage is 1.3V at the specified load and input voltage.
The input and output of the device are usually connected through an external 5V DC power supply. The input current is controlled by an internal current sensing circuit, which is designed to limit the average input current to the device. The output voltage is controlled by an internal voltage reference as well as an internal power transistor to adjust the output voltage as needed. The output voltage is set using external resistor, R1, connecting the ADJ pin to ground, as shown in the circuit diagram.
In an adjustable voltage output application, the output voltage is established by connecting the ADJ pin to a reference voltage. This reference voltage can be the supply voltage of the LDO itself, or a separate voltage reference placed in series with the ADJ pin. The output voltage is then established by selecting the proper resistor value for R1, so that the output voltage is equal to the reference voltage minus an offset voltage.
The device can also be used in a low-noise, ripple-rejection, fixed voltage output application. In this configuration, the ADJ pin is connected to the output, creating a voltage feedback loop. This type of application provides excellent noise and ripple rejection characteristics, making it ideal for use in sensitive applications.
The UA78L05CDRE4 is designed to provide superior performance, high power efficiency and excellent power management capabilities. Additionally, the device is available in a wide variety of packages and features a thermal shutdown circuit that prevents the device from overheating. Thus, this LDO regulator is a cost-effective and reliable solution for many applications.
The specific data is subject to PDF, and the above content is for reference
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