TPS54292 Series

4.5 V to 18 V input, 1.2 MHz, 1.5 / 2.5 A dual synchronous step-down converter

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Key Features

• 4.5-V to 18-V Input RangeOutput Voltage Range 0.8 V to DMAX× VINFully Integrated Dual Buck: 1.5 A and 2.5 AThree Fixed Switching Frequency Versions:TPS54290: 300 kHzTPS54291: 600 kHzTPS54292: 1.2 MHzIntegrated UVLO0.8 VREFWith 1% Accuracy (0°C to 85°C)Internal Soft Start:TPS54290: 5.2 msTPS54291: 2.6 msTPS54292: 1.3 msDual PWM Outputs 180° Out-of-PhaseDedicated Enable for Each ChannelCurrent Mode Control for Simplified CompensationExternal CompensationPulse-by-Pulse Overcurrent Protection, 2.2-A and 3.8-A Overcurrent LimitIntegrated Bootstrap SwitchThermal Shutdown Protection at 145°C16-Pin PowerPAD™ HTSSOP PackageAPPLICATIONSSet-Top BoxesDigital TVsPower for DSPConsumer ElectronicsAll other trademarks are the property of their respective owners4.5-V to 18-V Input RangeOutput Voltage Range 0.8 V to DMAX× VINFully Integrated Dual Buck: 1.5 A and 2.5 AThree Fixed Switching Frequency Versions:TPS54290: 300 kHzTPS54291: 600 kHzTPS54292: 1.2 MHzIntegrated UVLO0.8 VREFWith 1% Accuracy (0°C to 85°C)Internal Soft Start:TPS54290: 5.2 msTPS54291: 2.6 msTPS54292: 1.3 msDual PWM Outputs 180° Out-of-PhaseDedicated Enable for Each ChannelCurrent Mode Control for Simplified CompensationExternal CompensationPulse-by-Pulse Overcurrent Protection, 2.2-A and 3.8-A Overcurrent LimitIntegrated Bootstrap SwitchThermal Shutdown Protection at 145°C16-Pin PowerPAD™ HTSSOP PackageAPPLICATIONSSet-Top BoxesDigital TVsPower for DSPConsumer ElectronicsAll other trademarks are the property of their respective owners

Description

The TPS54290, TPS54291, and TPS54292 devices are dual-output, fully synchronous buck converters capable of supporting applications with a minimal number of external components. It operates from a 4.5-V to 18-V input supply voltage, and supports output voltages as low as 0.8 V and as high as 90% of the input voltage. Both high-side and low-side MOSFETs are integrated to provide fully synchronous conversion with higher efficiency. Channel 1 can provide up to 1.5 A of continuous current. Meanwhile, Channel 2 supports up to 2.5 A. Current mode control simplifies the compensation. The external compensation adds flexibility for the user to choose different type of output capacitors. 180° out-of-phase operation reduces the ripple current through the input capacitor, providing the benefit of reducing input capacitance, alleviating EMI and increasing capacitor life. The TPS54290, TPS54291, and TPS54292 devices are dual-output, fully synchronous buck converters capable of supporting applications with a minimal number of external components. It operates from a 4.5-V to 18-V input supply voltage, and supports output voltages as low as 0.8 V and as high as 90% of the input voltage. Both high-side and low-side MOSFETs are integrated to provide fully synchronous conversion with higher efficiency. Channel 1 can provide up to 1.5 A of continuous current. Meanwhile, Channel 2 supports up to 2.5 A. Current mode control simplifies the compensation. The external compensation adds flexibility for the user to choose different type of output capacitors. 180° out-of-phase operation reduces the ripple current through the input capacitor, providing the benefit of reducing input capacitance, alleviating EMI and increasing capacitor life.