STANDBY IC TPS 51225 Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs

TPS51225, TPS51225B, TPS51225C
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.