The TPS797xx family of low-dropout voltage regulators (LDOs) offers the benefits of low-dropout voltage and ultra-low-power operation. The device is stable with any capacitor greater than 0.47-µF. Therefore, implementations of this device require very little board space due to the miniaturized packaging and potentially small output capacitor. In addition, the family includes an integrated open drain active-high power good (PG) output. Intended for use in microcontroller-based, battery-powered applications, the TPS797xx family low dropout and ultra-low-power operation result in a significant increase in system battery operating life. The small packaging minimizes consumption of board space.
The device is enabled when the applied voltage exceeds the minimum input voltage. The usual PNP pass transistor has been replaced by a PMOS pass element.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, 105 mV at 10-mA of load current), and is directly proportional to the load current. The quiescent current is ultra-low (1.2-µA, typically) and is stable over the entire range of output load current
(0 mA to 50 mA). When properly configured with a pullup resistor, the PG output can implement a power-on reset or low-battery indicator.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS797xx | SC70 (5) | 2.00 mm × 1.25 mm |
Changes from I Revision (October 2013) to J Revision
Changes from H Revision (April 2012) to I Revision
Changes from G Revision (November 2009) to H Revision
Changes from F Revision (May 2009) to G Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | PG | O | The PG pin for the fixed voltage option devices is an open drain, active-high output that indicates the status of VO (output of the LDO). When VO exceeds approximately 90% of the regulated voltage, PG goes to a high-impedance state. PG goes to a low-impedance state when VO falls below approximately 90% (that is, overload condition) of the regulated voltage. The open drain output of the PG pin requires a pullup resistor. |
2 | GND | — | Ground |
3 | NC | — | No connection |
4 | IN | I | The IN pin is the power-supply input to the device. |
5 | OUT | O | The OUT pin provides the regulated output voltage of the device. |