TLV70311DBVR Integrated Circuits (ICs)

Current - Output:	300mA
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Protection Features:	Over Current
Control Features:	Current Limit
PSRR:	68dB (1kHz)
Current - Supply (Max):	370µA
Current - Quiescent (Iq):	55µA
Series:	--
Voltage Dropout (Max):	0.375V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.1V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The TLV70311DBVR is an adjustable 3.3V linear voltage regulator of the TLV703 family released by Texas Instruments. The regulator is a three-terminal integrated device package: VIN, GND, and VOUT. The TLV70311DBVR features an adjustable output range from 1.25V to 3.3V with a maximum output current of up to 250mA. The TLV70311DBVR provides exceptional transient response, extremely low supply current (typically 20µA), and low dropout performance. The device is available in both SOIC-8 and DSBGA-5 packages and is specified for the automotive temperature range of -40C to +125C.

Application Field

The TLV70311DBVR has wide application fields. It is most suitable for cost sensitive, power conscious, small form applications including automotive engine control, body control, audio, communication, and telecom. The adjustable output range from 1.25v to 3.3V makes it perfect to use in power supplies for digital pre-amplifiers, cellular signal processors, and data converters. The TLV70311DBVR is also ideal to use in applications where the voltage has to be constantly adjusted, such as portable instrumentation, vehicle tracking systems, and industrial control systems.

Working Principle

The TLV70311DBVR follows linear regulator topology to provide a stable, clean output voltage. It uses PNP input stage and P-channel MOSFETs working in Saturation Mode and a complementary closed loop architecture of an error amplifier and a low side N-type MOSFET at the output. The TLV70311DBVR operates from an input voltage up to 40V, and the current through the PNP stage is accurately regulated to approximately 4% over line, load, and temperature variations. The on-chip error amplifier compensates for variations of external components, such as voltage feedback, voltage reference, and supply voltage. When the error amplifier is activated, the gate of P-channel MOSFET turns on. The Collector of the PNP stage is connected to the lower gate of the N-type MOSFET, allowing the Gate voltage to control the current flowing through the two transistors. The error amplifier compares the output voltage with programmed feedback voltage. When the output voltage is higher than the programmed voltage, the error amplifier reduces the voltage at the gate of the P-channel MOSFET, reducing the flow of current through the transistors which in turn reduces the output voltage. When the output voltage is lower than programmed voltage, the error amplifier increases the voltage at the gate of the P-channel MOSFET, increasing the flow of current through the transistors and increasing the output voltage. In this way, the error amplifier accurately regulates the output voltage.

Protection Features

The TLV70311DBVR is designed with features that protect the device in critical situations. The device features an Under Voltage Lock Out (UVLO) which shuts off the device if the input voltage drops below the voltage specified by the user. The device also has an Over Temperature Shutdown (OTS) feature, which shuts off the device when the junction temperature of the device exceeds the specified junction temperature. Finally, the device features a Current Limit feature, which limits the current through the output of the device.

Conclusion

The TLV70311DBVR is an adjustable 3.3V linear voltage regulator of the TLV703 family released by Texas Instruments. The device is suitable for cost sensitive, power conscious, small form applications including automotive engine control, body control, audio, communication, and telecom. The device operates with a wide input voltage range, up to 40V, and offers exceptional transient response, extremely low supply current (typically 20µA), and low dropout performance. The device also features protection features such as UVLO, OTS, and Current Limit to protect the device in critical situations.

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