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TPS51225BRUKRTIN/a2739avaiDual Synchronous Step-Down Controller with 5-V and 3.3-V LDOs 20-WQFN -40 to 85


TPS51225BRUKR ,Dual Synchronous Step-Down Controller with 5-V and 3.3-V LDOs 20-WQFN -40 to 85FEATURES APPLICATIONS2• Input Voltage Range: 5.5 V to 24 V • Notebook Computers• Output Voltages: 5 ..
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TPS51225BRUKR
Dual Synchronous Step-Down Controller with 5-V and 3.3-V LDOs 20-WQFN -40 to 85
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
Checkfor Samples: TPS51225, TPS51225B, TPS51225C
1FEATURES APPLICATIONS Input Voltage Range: 5.5Vto24V • Notebook Computers Output Voltages:5V and 3.3V (Adjustable • Netbook, Tablet Computers
Range ±10%)
DESCRIPTION• Built-in, 100-mA, 5-V and 3.3-V LDOs

The TPS51225/B/C is a cost-effective, dual-• Clock Output for Charge-Pump synchronous buck controller targeted for notebook• ±1% Reference Accuracy system-power supply solutions.It provides 5-V and Adaptive On-time D-CAP™ Mode Control 3.3-V LDOs and requires few external components.
The 260-kHz VCLK output can be usedto drive anArchitecture with 300kHz/355kHz Frequency
external charge pump, generating gate drive voltageSetting
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 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 with operation. The device operates with supply input4500 ppm/°C Temperature Coefficient voltage ranging from 5.5Vto 24V and supports• Built-in Output Discharge Function output voltages of 5.0 V and 3.3 V. The
TPS51225/B/Cis availableina 20-pin,3 mm×3• Separate Enable Input for Switchers
mm, QFN package andis specified from –40°Cto(TPS51225/B/C) 85°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)
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