The TPS720 family of dual rail, low-dropout linear regulators (LDOs) offers outstanding ac performance (PSRR, load and line transient response), while consuming a very low quiescent current of 38 µA.
The VBIAS rail that powers the control circuit of the LDO draws very low current (on the order of the quiescent current of the LDO) and can be connected to any power supply that is equal to or greater than 1.4 V above the output voltage. The main power path is through VIN, which can be a lower voltage than VBIAS; it can be as low as VOUT + VDO, increasing the efficiency of the solution in many power-sensitive applications. For example, VIN can be an output of a high-efficiency, DC-DC step-down regulator.
The TPS720 supports a novel feature in which the output of the LDO regulates under light loads when the IN pin is left floating. The light-load drive current is sourced from VBIAS under this condition. This feature is particularly useful in power-saving applications where the DC-DC converter connected to the IN pin is disabled but the LDO is still required to regulate the voltage to a light load.
The TPS720 is stable with ceramic capacitors and uses an advanced BICMOS fabrication process that yields a dropout of 110 mV at a 350-mA output load. The TPS720 has the unique feature of providing a monotonic VOUT rise (overshoot limited to 3%) with VIN inrush current limited to 100 mA + ILOAD with an output capacitor of 2.2 µF.
The TPS720 uses a precision voltage reference and feedback loop to achieve overall
accuracy of 2% over load, line, process, and temperature extremes. An ultra-small DSBGA package
makes the TPS720 ideal for handheld applications. The TPS720 is also available in a SON-8 package.
This family of devices is fully specified over the temperature range of
TJ = –40°C to 125°C.
| Documentación principal | Tipo | Título | Opciones de formato | Descargar la versión más reciente en inglés | Fecha |
|---|---|---|---|---|---|
| * | Hoja de datos | TPS720 350 mA, Ultra-Low VIN, RF Low-Dropout Linear Regulator With Bias Pin datasheet (Rev. E) | PDF | HTML | 30/09/2015 | |
| Nota sobre la aplicación | LDO Noise Demystified (Rev. B) | PDF | HTML | 18/08/2020 | ||
| Nota sobre la aplicación | A Topical Index of TI LDO Application Notes (Rev. F) | 27/06/2019 | |||
| Guía de selección | Low Dropout Regulators Quick Reference Guide (Rev. P) | 21/03/2018 | |||
| Nota sobre la aplicación | LDO PSRR Measurement Simplified (Rev. A) | PDF | HTML | 9/08/2017 | ||
| Nota sobre la aplicación | Power Reference Design for the 'C6472, 12V DCDC Controllers, and LDOs | 26/03/2010 | |||
| Analog Design Journal | Taming linear-regulator inrush currents | 1/05/2009 | |||
| Analog Design Journal | Q2 2009 Issue Analog Applications Journal | 1/05/2009 | |||
| Guía del usuario | TPS720xx | 19/08/2008 | |||
| Nota sobre la aplicación | Inrush Current Limit in the TPS720xx | 6/06/2008 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
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| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| WSON (DRV) | 6 | Ultra Librarian |
| DSBGA (YZU) | 5 | Ultra Librarian |
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