The TPS6223x device family is a high-frequency, synchronous, step-down DC – DC converter
optimized for battery powered portable applications. It supports up to 500-mA output current and
allows the use of tiny and low-cost chip inductors and capacitors.
With a wide input voltage range of 2.05 V to 6 V, the device supports applications
powered by Li-Ion batteries with extended voltage range. The minimum input voltage of 2.05 V allows
as well the operation from Li-primary or two alkaline batteries. Different fixed output voltage
versions are available from 1.0 V to 3.3 V.
The TPS6223x series features switch frequency up to 3.8 MHz. At medium to heavy loads,
the converter operates in pulse width modulation (PWM) mode and automatically enters power-save
mode operation at light load currents to maintain high efficiency over the entire load current
Because of its excellent power supply rejection ratio (PSRR) and AC load regulation
performance, the device is also suitable to replace linear regulators to obtain better power
The power-save mode in TPS6223x reduces the quiescent current consumption down to 22 µA
during light load operation. It is optimized to achieve very low output voltage ripple even with
small external component and features excellent AC load regulation.
For very noise-sensitive applications, the device can be forced to PWM mode operation
over the entire load range by pulling the MODE pin high. In the shutdown mode, the current
consumption is reduced to less than 1 µA. The TPS6223x operates over a junction temperature range
of –40°C to 125°C. It is available in a 1 mm × 1.5 mm × 0.6 mm 6-pin SON package.
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