UA78L05AIDRG4

Voltage Dropout (Max):	1.7V @ 40mA
Base Part Number:	UA78L05A
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°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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<p>The UA78L05AIDRG4 is a three-terminal low dropout (LDO) linear regulator, designed with high performance and low power dissipation in mind. This versatile LDO regulator, manufactured by Texas Instruments, is designed to support a wide range of applications as well as various requirements for voltage and current regulation.</p><p>The UA78L05AIDRG4 is capable of delivering up to 500 mA of continuous output current and up to 800 mA of peak output current for short intervals. It operates over a wide input voltage range, from 3 V to 36 V, meaning it can be used in many different scenarios, from automotive to industrial ones. Its low dropout voltage, which starts out at 220 mV at 500 mA and decreases down to 160 mV at 100 mA, optimizes system performance by minimising quiescent current and power dissipation.</p><p>The UA78L05AIDRG4 features an on-board internal error flag (ERROROUT) that signals an out-of-regulation event or current limit condition. In addition, it has a shutdown feature that can reduce power consumption by reducing the voltage regulator’s output to zero when not in use. The UA78L05AIDRG4 also employs several safety features, including over-current protection, over-temperature protection, and over-voltage protection.</p><p>The UA78L05AIDRG4’s working principle is simple. The regulating element is an NPN series pass transistor connected in between the input voltage and the output voltage. When a load is connected to the output and enabled, the LM78L05AIDRG4 will try to maintain a constant output voltage by comparing the difference between the input and output voltages. If this voltage difference (or dropout voltage) is large, the LM78L05AIDRG4 will draw more current from the input to ensure the same output voltage. On the other hand, if the voltage difference is small, the LM78L05AIDRG4 will draw less current from the input in order to maintain the same output voltage.</p><p>The UA78L05AIDRG4 is suited for many applications that require stabilised power supplies such as fixed output voltage regulation, variable output voltage regulation and transient voltage suppression. It is used in a wide range of applications that demand high efficiency, such as battery-powered equipment, automotive systems, medical systems, powering high-performance microprocessors, and portable devices.</p><p>In conclusion, the UA78L05AIDRG4 is a versatile LDO linear regulator with a wide input voltage range, low quiescent current, and high output current. Its low dropout voltage and shutdown feature provide a high level of protection, making it an ideal choice for many applications.</p>

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