The TPS6124x device is a highly efficient synchronous step-up DC-DC converter optimized
for products powered by either a three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or
Li-Polymer battery. The TPS6124x supports output currents up to 450 mA. The TPS61240 has an input
valley current limit of 500 mA, and the TPS61241 has an input valley current of 600 mA.
With an input voltage range of 2.3 V to 5.5 V, the device supports batteries with
extended voltage range and are ideal to power portable applications like mobile phones and other
portable equipment. The TPS6124x boost converter is based on a quasi-constant on-time valley
current mode control scheme.
The TPS6124x presents a high impedance at the VOUT pin when shut
down. This allows for use in applications that require the regulated output bus to be driven by
another supply while the TPS6124x is shut down.
During light loads the device will automatically pulse skip allowing maximum efficiency
at lowest quiescent currents. In the shutdown mode, the current consumption is reduced to less than
TPS6124x allows the use of small inductors and capacitors to achieve a small solution
size. During shutdown, the load is completely disconnected from the battery. The TPS6124x is
available in a 6-pin DSBGA and 2-mm × 2-mm WSON package.