Current - Output:	400mA
Base Part Number:	TLE4274
Supplier Device Package:	PG-TO263-3
Package / Case:	TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Short Circuit
Control Features:	--
PSRR:	60dB (100Hz)
Current - Supply (Max):	30mA
Current - Quiescent (Iq):	220µA
Series:	Automotive, AEC-Q100
Voltage Dropout (Max):	0.5V @ 250mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	40V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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TLE42742GV50ATMA1 Application Field and Working Principle

Introduction:

The TLE42742GV50ATMA1 is a family of extremely low power linear voltage regulators from Infineon Technologies. It can provide precise output voltages of 1.6V and 2.5V, with an input voltage range of 2V to 6V. The device features extremely low quiescent current (150nA typical) and a high power supply rejection ratio (PSRR) of 85dB. This makes it ideal for powering low-power systems such as IoT or wearables, or for battery powered systems where low quiescent current consumption is a must.

Application Field:

The TLE42742GV50ATMA1 is intended for use in a wide range of automotive, consumer and industrial applications. It is well suited for low voltage supply systems due to its low quiescent current and wide input voltage range. This makes it an ideal candidate for battery powered applications, where power consumption must be kept to a minimum. Other applications include supplying the required voltage for microprocessors, logic circuits and memory systems. It is also suitable for use in portable and wearable devices, where a precise and low quiescent current regulator is essential to preserve battery life.

Working Principle:

The TLE42742GV50ATMA1 is a stable and low quiescent current linear voltage regulator that works by controlling the output voltage via a voltage loop and implementing a series of feedback and compensation methods.A voltage divider built around two resistors is used to set the output voltage. The output voltage is then applied to the regulator’s feedback pin which is connected to an error amplifier. The output of the error amplifier is fed back to the transistor base, causing the output voltage to be adjusted until it matches the desired setpoint.In order to prevent the output voltage from oscillating, the regulator uses a compensation network. This consists of two capacitors, a resistor and the output capacitor. The compensation network helps stabilize the output voltage by limiting the slew rate of the error amplifier and compensating for any phase shifts in the voltage loop.The device also has several protection features including over-temperature shutdown and reverse current protection.

Conclusion:

The TLE42742GV50ATMA1 from Infineon Technologies is an excellent choice for low voltage regulator applications. Its low quiescent current, wide input voltage range and high power supply rejection ratio make it an ideal candidate for low power systems such as IoT, wearables and battery powered products. The device also features protection against over-temperature shutdown, reverse current and output voltage oscillations, making it a suitable choice for a wide range of applications.

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