Description
Description for the TPS51225C
nThe 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 for the TPS51225C
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nInput Voltage Range: 5.5 V to 24 V
nOutput Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
nBuilt-in, 100-mA, 5-V and 3.3-V LDOs
nClock Output for Charge-Pump
n±1% Reference Accuracy
nAdaptive On-time D-CAP Mode Control Architecture with 300kHz/355kHz Frequency Setting
nAuto-skip Light Load Operation (TPS51225/C)
nOOA Light Load Operation (TPS51225B)
nInternal 0.8-ms Voltage Servo Soft-Start
nLow-Side RDS(on) Current Sensing Scheme with 4500 ppm/°C Temperature Coefficient
nBuilt-in Output Discharge Function
nSeparate Enable Input for Switchers (TPS51225/B/C)
nDedicated OC Setting Terminals
nPower Good Indicator
nOVP/UVP/OCP Protection
nNon-latch UVLO/OTP Protection
n20-Pin, 3 mm × 3 mm, QFN (RUK)
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nDescription for the TPS51225C
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nThe 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.
