TPS70933DRVR IC

Technical Specifications of TPS70933DRVR

Datasheet	TPS70933DRVR datasheet
Category	Integrated Circuits (ICs)
Family	PMIC – Voltage Regulators – Linear
Manufacturer	Texas Instruments
Series	–
Packaging	Cut Tape (CT)
Part Status	Active
Regulator Topology	Positive Fixed
Voltage – Output	3.3V
Current – Output	150mA
Voltage – Dropout (Typical)	0.96V @ 150mA
Number of Regulators	1
Voltage – Input	Up to 30V
Current – Limit (Min)	200mA
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	6-WDFN Exposed Pad
Supplier Device Package	6-SON (2×2)

TPS70933DRVR Description

The linear regulators in the TPS709 series have very low quiescent current and are made for applications sensitive to power. An error amplifier and precision band gap have a temperature-dependent accuracy of 2%. With a quiescent current of only 1 A, these devices are perfect for battery-powered, always-on systems that need very little power when they are not doing anything. These devices protect against overheating, too much current, and reverse current for extra safety. Pulling the EN pin low turns on shutdown mode. In this mode, the shutdown current drops to about 150 nA. The TPS709 series comes in two different types of packages: WSON-6 and SOT-23-5.

TPS70933DRVR Features

• IQ of 1 A is very low.
• Protection against the reverse current.
• The SHUTDOWN is low: 150 nA.
• Input voltage range: 2.7 V to 30 V.
• Supports a peak output of 200 mA.
• 2% accuracy with regard to temperature.
• Fixed output voltages range from 1.2 V to 6.5 V.
• Thermal shutdown and protection from too much current.
• Packages: SOT-23-5, WSON-6.

Detailed Description

The devices in the TPS709 series are linear regulators with ultra-low quiescent current and low dropout (LDO). The TPS709 has protection against the reverse current, which stops any discharge current from going from the output to the input. The TPS709 also has a current limit and a thermal shutdown for reliable operation.

Feature Description

● Internal Current Limit

The internal current limit of the TPS709 helps protect the regulator when something goes wrong. During the current limit, the output sends out a fixed amount of current, mostly unaffected by the output voltage. In this case, the output voltage is not controlled, and VOUT = ILIMIT RLOAD is a good way to measure it. The PMOS pass transistor gives off heat until a thermal shutdown is triggered and the device turns off. When the device is cool, a built-in thermal shutdown circuit turns it back on. If the problem continues, the device will switch back and forth between the current limit and thermal shutdown.

The TPS709 is tested with an output current of up to 150 mA, the recommended range. When the output current is at least 200 mA, the internal current limit limits the current. The TPS709 works for output currents between 150 mA and 200 mA, but some of the parameters on the data sheet may not be met.

● Undervoltage Lockout (UVLO)

The TPS709 has an undervoltage lockout circuit that keeps the output off until the internal circuitry works correctly.

● Reverse-Current Protection

The TPS709 has built-in protection against reverse currents. When the output voltage exceeds the input voltage, reverse-current protection stops the current from flowing from the OUT pin to the IN pin. When the output voltage exceeds the input voltage, the reverse-current protection circuitry gives the power path a high impedance. With this setting, the average amount of current that leaks from the output to the input is reduced to 10 nA. The protection against the reverse current is always on, no matter what the enable pin’s logic state or if the OUT pin’s voltage is higher than 1.8 V.

Application Information

The TPS709 is a group of devices with good line and load transient performance and low quiescent current consumption. Its performance, with the very good PSRR and low noise with minimal headroom, makes this device ideal for current limiting and thermal protection in portable RF applications. The range for the TPS709 is from –40°C to +125°C.

Input and Output Capacitor

For output voltages below 1.5 V, the TPS709 devices are stable with output capacitors with an effective capacitance of 2.0 F or more. For output voltages of 1.5 V or more, the minimum stable, effective capacitance is 1.5 F. The most stable amount of capacitance is 47 F. For stability, the output capacitor’s equivalent series resistance (ESR) must be between 0 and 0.2.

The effective capacitance is the minimum value of a capacitor’s capacitance after tolerance, temperature, and dc bias effects are considered. Ceramic capacitors of the X5R and X7R types are recommended because their value and ESR change very little with temperature. Even though an input capacitor is not needed for stability, a 0.1-F to 2.2-F capacitor should be connected from IN to GND. This capacitor cancels out reactive input sources and improves transient response, input ripple, and PSRR. An input capacitor must be used if line fluctuations of more than 10 V are expected.

Layout

● Layout Guidelines

Put output and input capacitors as near as feasible to the connector pins of the device. TI recommends that the board be constructed with distinct ground planes for VIN and VOUT, with the ground plane exclusively connected to the device’s GND pin. This will improve AC (such as PSRR, output noise, and transient responsiveness). Moreover, the GND pin of the device must be directly linked to the ground connector of the output capacitor.

● Thermal Protection

When the junction temperature reaches about 165°C, thermal protection turns off the output so the device can cool down. When the temperature at the junction drops to about 145°C, the output circuitry is turned back on. The thermal protection circuit’s activation and deactivation are affected by ambient temperature, thermal resistance, and power dissipation. By reducing the regulator’s heat loss through cycling, we prevent it from overheating and breaking. Any tendency to turn on the thermal protection circuit means that too much power is lost or the heat sink is not big enough. For reliable operation, keep the junction temperature to no more than 125°C.

To determine the margin of safety in a full design (including the heat sink), raise the ambient temperature until the thermal protection kicks in and use the worst-case loads and signal conditions. For good reliability, thermal protection must go off when the temperature is at least 35°C higher than the highest expected ambient temperature for the application. At the highest temperature expected and with the worst load, this setup makes a worst-case junction temperature of 125°C. The TPS709 has built-in protection circuitry to keep it from getting too hot. This circuitry is not meant to replace a good way to eliminate heat. Running the TPS709 into thermal shutdown constantly makes the device less reliable.

Conclusion

Ultimately, the TPS70933DRVR linear regulator from Texas Instruments is a great choice if you need a stable and reliable power source for your electronic application. With a low dropout voltage, high accuracy, and a maximum output current of 0.15A, this device ensures that the voltage levels at your output are always the same.

The load and line regulation are 20mV and 3mV, respectively. Its fixed output of 3.3V makes it great for many different applications, and its wide operating temperature range and safe tape and reel packaging make it good for many different environments. You can buy this device from ICRFQ, a reliable electronic distributor in China, and take your project to the next level. Don’t pass up on this powerful microcontroller; let ICRFQ help you make your project successful.

The Latest And Most Popular Parts That You May Also Like