The TPS51225/B/C is a cost-effective, dual-synchronous buck controller targeted for
notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external
components. The 260-kHz VCLK output can be used to drive an external charge pump, generating gate
drive voltage for the load switches without reducing the main converter efficiency. The
TPS51225/B/C supports high efficiency, fast transient response and provides a combined power-good
signal. Adaptive on-time, D-CAP™ control provides convenient and efficient operation. The device
operates with supply input voltage ranging from 5.5 V to 24 V and supports output voltages of 5.0 V
and 3.3 V. The TPS51225/B/C is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified
from –40°C to 85°C.
The TPS51225/B/C is a cost-effective, dual-synchronous buck controller targeted for
notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external
components. The 260-kHz VCLK output can be used to drive an external charge pump, generating gate
drive voltage for the load switches without reducing the main converter efficiency. The
TPS51225/B/C supports high efficiency, fast transient response and provides a combined power-good
signal. Adaptive on-time, D-CAP™ control provides convenient and efficient operation. The device
operates with supply input voltage ranging from 5.5 V to 24 V and supports output voltages of 5.0 V
and 3.3 V. The TPS51225/B/C is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified
from –40°C to 85°C.