Datasheet Texas Instruments FX011 — Ficha de datos

TPS51225, TPS51225B, TPS51225C
www.ti.com SLUSAV0B – JANUARY 2012 – REVISED SEPTEMBER 2012 Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
Check for Samples: TPS51225, TPS51225B, TPS51225C FEATURES APPLICATIONS 1 Input Voltage Range: 5.5 V to 24 V Notebook Computers
Output Voltages: 5 V and 3.3 V (Adjustable Netbook, Tablet Computers
Range В±10%)
DESCRIPTION
Built-in, 100-mA, 5-V and 3.3-V LDOs
The TPS51225/B/C is a cost-effective, dualClock Output for Charge-Pump
synchronous buck controller targeted for notebook
В±1% Reference Accuracy
system-power supply solutions. It provides 5-V and
Adaptive On-time D-CAPв„ў Mode Control
3.3-V LDOs and requires few external components.
The 260-kHz VCLK output can be used to drive an
Architecture with 300kHz/355kHz Frequency
external charge pump, generating gate drive voltage
Setting
for the load switches without reducing the main
Auto-skip Light Load Operation (TPS51225/C)
converter efficiency. The TPS51225/B/C supports
OOA Light Load Operation (TPS51225B)
high efficiency, fast transient response and provides a
combined power-good signal. Adaptive on-time, DInternal 0.8-ms Voltage Servo Soft-Start …