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TPS51275CRUKTTIN/a100avaiDual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs 20-WQFN -40 to 125


TPS51275CRUKT ,Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs 20-WQFN -40 to 125FEATURES APPLICATIONS2• Input Voltage Range: 5 V to 24 V • Notebook Computers• Output Voltages: 5 V ..
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TPS51275CRUKT
Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
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
1FEATURES APPLICATIONS Input Voltage Range:5Vto24V • Notebook Computers Output Voltages:5V and 3.3V (Adjustable • Tablet Computers
Range ±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• ±1% Reference Accuracy targeted for notebook system-power supply solutions. Adaptive On-Time D-CAP™ Mode Control It provides 5-V and 3.3-V LDOs and requires few
external components. The 260-kHz VCLK output canArchitecture with 300-kHz and 355-kHz usedto drivean external charge pump, generatingFrequency Setting
gate drive voltage for the load switches without• Auto-skip Light Load Operation (TPS51275, reducing the main converter efficiency. Theand TPS51275C) TPS51275, TPS51275B and TPS51275C supports• OOA Light Load Operation (TPS51275B) high efficiency, fast transient response and providesa
combined power-good signal. Adaptive on-time, D-• Internal 0.8-ms Voltage Servo Soft-Start
CAP™ control provides convenient and efficient• Low-Side RDS(on) Current Sensing Scheme operation. The device operates with supply input• Built-In Output Discharge Function voltage ranging from5Vto 24V and supports output
voltages of 5.0 V and 3.3 V. The TPS51275,• Separate Enable Input for Switchers
TPS51275B and TPS51275C are availableina 20-• Dedicated OC Setting Terminals pin,3 mmx3 mm, QFN package andis specified• Power Good Indicator from –40°Cto 85°C. OVP, UVP and OCP Protection Non-Latch UVLO and OTP Protection 20-Pin,3 mmx3 mm, QFN (RUK)
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