TPS51275BRUKR TPS51275B 1275B QFN20 Laptop IC Chip

TPS51275BRUKR TPS51275B 1275B QFN20 Laptop IC Chip

TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs

1 Features 2 Applications

1• Input Voltage Range: 5 V to 24 V • Notebook Computers

• Output Voltages: 5 V and 3.3 V (Adjustable Range • Tablet Computers

±10%) • Desktop Computers

• Built-in, 100-mA, 5-V, and 3.3-V LDOs

• Clock Output for Charge-Pump 3 Description

The TPS51275B-1 device is a cost-effective, dual- • ±1% Reference Accuracy

synchronous buck controller targeted for notebook

• Adaptive On-Time D-CAP™ Mode Control system-power supply solutions. The device has 5-V

Architecture with 300-kHz and 355-kHz Frequency and 3.3-V low-dropout regulators (LDOs) and

Setting requires few external components. The 260-kHz

• Out-of-Audio™ (OOA) Light-Load Operation VCLK output can be used to drive an external charge

pump, generating gate drive voltage for the load • Internal 3.2-ms Voltage Servo Soft-Start switches without reducing the main converter