TC125

Voltage on V_DD, SENSE/V_DD, LX, SHDN Pins...... -0.3V to +12V
LX Sink Current ...................................................... 400mA pk
Power Dissipation........................................................150mW
Operating Temperature Range.........................-40 to +85
Storage Temperature Range ......................... -40to +125

*Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These
are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.

The TC125/126 step-up (Boost) switching regulators furnish output currents to a maximum of 80mA (V_IN = 2V, V_OUT = 3V) with typical efficiencies above 80%. These devices employ pulse frequency modulation (PFM) for minimum supply current at low loads. They are ideal for battery-operated applications powered from one or more cells. Maximum supply current is less than 70µA at full output load, and less than 5µA in standby (V_OUT = 3V). Both devices require
only an external inductor, diode, and capacitor to implement a complete DC/DC regulator.

The TC126 has separate output voltage sensing and chip power inputs for greater application flexibility. The TC125 combines the output voltage sensing and chip power inputs onto a single package pin, but adds a power-saving shutdown mode that suspends regulator operation and reduces supply current to less than 0.5µA when the shutdown control input (SHDN) is low.

The TC125/TC126 are available in a small 5-Pin SOT-23A package, occupy minimum board space and use small external components. It accepts input voltages from 2V to 10V. The TC126 accepts input voltages from 2.2V to 10V. Both the device have a start-up voltage of 0.9V at light load.