TPS54290

4.5V 至 18V 输入、1.5/2.5A 双路同步降压 SWIFT™ 转换器

The , 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.

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4.5-V to 18-V Input Range

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Output Voltage Range 0.8 V to DMAX × VIN

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Fully Integrated Dual Buck: 1.5 A and 2.5 A

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Three Fixed Switching Frequency Versions:

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TPS54290: 300 kHz

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TPS54291: 600 kHz

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TPS54292: 1.2 MHz

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Integrated UVLO

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0.8 VREF With 1% Accuracy 0°C to 85°C

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Internal Soft Start:

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TPS54290: 5.2 ms

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TPS54291: 2.6 ms

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TPS54292: 1.3 ms

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Dual PWM Outputs 180° Out-of-Phase

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Dedicated Enable for Each Channel

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Current Mode Control for Simplified Compensation

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External Compensation

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Pulse-by-Pulse Overcurrent Protection, 2.2-A and 3.8-A Overcurrent Limit

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Integrated Bootstrap Switch

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Thermal Shutdown Protection at 145°C

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16-Pin PowerPAD™ HTSSOP Package

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APPLICA ONS

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Set-Top Boxes

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Digital TVs

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Power for DSP

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Consumer Electronics

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