The TPS769xx-Q1 family of low-dropout (LDO) voltage regulators offers the benefits of
low-dropout voltage, ultralow-power operation, and miniaturized packaging. These regulators feature
low-dropout voltages and ultralow quiescent current compared to conventional LDO regulators.
Offered in a 5-pin small outline integrated-circuit SOT-23 package, the TPS769xx-Q1 series of
devices are ideal for micropower operations and where board space is at a premium.
A combination of new circuit design and process innovation has enabled the usual PNP pass
transistor to be replaced by a PMOS pass element. Because the PMOS pass element behaves as a
low-value resistor, the dropout voltage is very low, typically 71 mV at 100 mA of load
current (TPS76950-Q1), and is directly proportional to the load current. Because the PMOS pass
element is a voltage-driven device, the quiescent current is ultralow (28 µA maximum) and is stable
over the entire range of output load current (0 mA to 100 mA). The ultralow-dropout
voltage feature and ultralow-power operation result in a significant increase in system battery
operating life, making this device suitable for use in automotive applications.
The TPS769xx-Q1 devices also feature a logic-enabled sleep mode to shut down the
regulator, reducing quiescent current to 1 µA (typical) at TJ = 25°C. The
TPS769xx-Q1 devices are offered in 1.2-V, 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3-V,
3.3-V, and 5-V fixed-voltage versions and in a variable version (programmable over the range of 1.2
V to 5.5 V).