The TPS71xx integrated circuits are a family of micropower low-dropout (LDO) voltage regulators. An order of magnitude reduction in dropout voltage and quiescent current over conventional LDO performance is achieved by replacing the typical pnp pass transistor with a PMOS device.
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (maximum of 32 mV at an output current of 100 mA for the TPS7150) and is directly proportional to the output current (see Figure 1). Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very low and remains independent of output loading (typically 285 µA over the full range of output current, 0 mA to 500 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems. The LDO family also features a sleep mode; applying a TTL high signal to EN (enable) shuts down the regulator, reducing the quiescent current to 0.5 µA maximum at TJ = 25°C.
Voltage – Power good (PG) reports low output voltage and can be used to implement a power-on reset or a low-battery indicator.
The TPS71xx is offered in 3.3-V, 4.85-V, and 5-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.2 V to 9.75 V). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges (3% for adjustable version). The TPS71xx family is available in PDIP (8 pin), SO (8 pin), and TSSOP (20-pin) packages. The TSSOP has a maximum height of 1,2 mm.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Low-Dropout Voltage Regulators datasheet (Rev. G) | 22 Jan 2003 | |
| Application note | LDO Noise Demystified (Rev. B) | PDF | HTML | 18 Aug 2020 | |
| Application note | Fundamental Theory of PMOS LDO Voltage Regulators (Rev. A) | 17 Aug 2018 | ||
| Application note | LDO PSRR Measurement Simplified (Rev. A) | PDF | HTML | 09 Aug 2017 | |
| Application note | Power Supply Sequencing Solutions for Dual Supply Voltage DSPs (Rev. A) | 05 Jul 2000 | ||
| Application note | Technical Review of Low Dropout Voltage Regulator Operation And Performance | 30 Aug 1999 | ||
| Application note | TMS320C62x/67x Power Supply Solutions for 1-2 DSPs Using the TL5001A and TPS7133 (Rev. A) | 01 Jun 1999 |
For additional terms or required resources, click any title below to view the detail page where available.
This spreadsheet calculates the operating parameters for the Texas Instruments TPS7x01 family of adjustable low dropout regulators.
The closest 1% resistor values are calculated, as well as, the maximum power dissipation, worst-case output voltages, Power-Good trip voltages, and maximum (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| PDIP (P) | 8 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |
| TSSOP (PW) | 20 | Ultra Librarian |
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