TPS51225RUKR Datasheet PDF - TI

●DESCRIPTION

●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.

●FEATURES

●• Input Voltage Range: 5.5 V to 24 V

●• Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)

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

●• Clock Output for Charge-Pump

●• ±1% Reference Accuracy

●• Adaptive On-time D-CAP™ Mode Control Architecture with 300kHz/355kHz Frequency Setting

●• Auto-skip Light Load Operation (TPS51225/C)

●• OOA Light Load Operation (TPS51225B)

●• Internal 0.8-ms Voltage Servo Soft-Start

●• Low-Side RDS(on) Current Sensing Scheme with 4500 ppm/°C Temperature Coefficient

●• Built-in Output Discharge Function

●• Separate Enable Input for Switchers(TPS51225/B/C)

●• Dedicated OC Setting Terminals

●• Power Good Indicator

●• OVP/UVP/OCP Protection

●• Non-latch UVLO/OTP Protection

●• 20-Pin, 3 mm × 3 mm, QFN (RUK)

●APPLICATIONS

●• Notebook Computers

●• Netbook, Tablet Computers