TPS79850QDGNRQ1

1 FEATURES

• Qualified for Automotive Applications

• Wide Input Voltage Range: 3 V to 50 V

• Low Quiescent Current: 40 μA (Typ)

• Low Dropout Voltage: 300 mV (Typ)

• Output Current: 50 mA

• No Input Protection Diodes Needed

• Adjustable Output From 1.275 V to 28 V

• 1-μA Quiescent Current in Shutdown

• Stable With 1-μF Output Capacitor

• Stable With Aluminum, Tantalum, or Ceramic Capacitors

• Reverse Input-Battery Protection

• Reverse Output Current Flow Protection

• Thermal Limiting

• Available in MSOP-8 Package

2 APPLICATIONS

• Low-Current, High-Voltage Regulators

• Regulators for Battery-Powered Systems

• Telecom

• Automotive

3 DESCRIPTION

The TPS798xx is the first device in a line of 50-V high-voltage micropower low-dropout (LDO) linear regulators. This device is capable of supplying 50-mA output current with a dropout voltage of only 300 mV. Designed for low quiescent current high voltage (50 V) applications, 40 μA operating and 1 μA in shutdown makes the TPS798xx an ideal choice for battery-powered or high-voltage systems. Quiescent current is also well-controlled in dropout.

Other features of the TPS798xx include the ability to operate with low equivalent series resistance (ESR) ceramic output capacitors. This device is stable with only 1 μF on the output; most older devices require between 10-μF and 100-μF tantalum capacitors for stability. Small ceramic capacitors can be used without the necessary addition of ESR, as is common with other regulators. Internal protection circuitry includes reverse input-battery protection, reverse output current protection, current limiting, and thermal limiting to protect the device in various

fault conditions.

This device is available in a fixed output voltage of 5 V (TPS79850) and with an adjustable output voltage with a 1.275-V reference voltage (TPS79801). The TPS798xx regulator is available in a 8-lead MSOP (DGN) package with an exposed pad for enhanced thermal management capability.

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