The TPS78825 and TPS78833 are very small (SOT-23) package, low-noise LDOs that regulate the output voltage to 2.5 V and 3.3 V with input voltage ranging from 2.7 V to an absolute maximum of 13.5 V. These devices output 150 mA with a peak current of 350 mA (typ). The TPS788xx family uses the SR pin to program the output voltage slew rate to control the in-rush current. This is specifically used in the USB application where large load capacitance is present at start-up. The TPS788xx devices use only 17 uA of quiescent current and exhibit only 56 uV RMS of output voltage noise using a 10 uF output capacitor.
The usual PNP pass transistor has been replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is very low, typically 150 mV at 150 mA of load current, and is directly proportional to the load current.
The TPS788xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current to 1 uA typical at TJ = 25°C.
| Output options | Fixed Output |
| Iout (max) (A) | 0.15 |
| Vin (max) (V) | 10 |
| Vin (min) (V) | 2.7 |
| Vout (max) (V) | 3.3 |
| Vout (min) (V) | 2.5 |
| Fixed output options (V) | 2.5, 3.3 |
| Noise (µVrms) | 56 |
| Iq (typ) (mA) | 0.017 |
| Thermal resistance θJA (°C/W) | 180 |
| Rating | Catalog |
| Load capacitance (min) (µF) | 4.7 |
| Regulated outputs (#) | 1 |
| Features | Enable, Soft start |
| Accuracy (%) | 3 |
| PSRR at 100 KHz (dB) | 25 |
| Dropout voltage (Vdo) (typ) (mV) | 150 |
| Operating temperature range (°C) | 0 to 70 |
| SOT-23 (DBV) | 5 | 8.12 mm² 2.9 x 2.8 |
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