Datasheet Texas Instruments HPA02239RUKR — Ficha de datos

TPS51275, TPS51275B, TPS51275C
www.ti.com SLUSB45B – JUNE 2012 – REVISED MARCH 2013 Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
FEATURES APPLICATIONS 1 2 Input Voltage Range: 5 V to 24 V Notebook Computers
Output Voltages: 5 V and 3.3 V (Adjustable Tablet Computers
Range В±10%)
DESCRIPTION
Built-in, 100-mA, 5-V and 3.3-V LDOs
The TPS51275, TPS51275B and TPS51275C are
Clock Output for Charge-Pump
cost-effective, dual-synchronous buck controllers
В±1% Reference Accuracy
targeted for notebook system-power supply solutions.
Adaptive On-Time D-CAPв„ў Mode Control
It provides 5-V and 3.3-V LDOs and requires few
external components. The 260-kHz VCLK output can
Architecture with 300-kHz and 355-kHz
be used to drive an external charge pump, generating
Frequency Setting
gate drive voltage for the load switches without
Auto-skip Light Load Operation (TPS51275,
reducing the main converter efficiency. The
and TPS51275C)
TPS51275, TPS51275B and TPS51275C supports …