TPS54291数据手册集成电路（IC）的DCDC开关稳压器规格书PDF

描述 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.

特性 Features

• 4.5-V to 18-V Input Range
• Output Voltage Range 0.8 V to DMAX × VIN
• Fully Integrated Dual Buck: 1.5 A and 2.5 A
• Three Fixed Switching Frequency Versions:
• TPS54290: 300 kHz
• TPS54291: 600 kHz
• TPS54292: 1.2 MHz

• Integrated UVLO
• 0.8 VREF With 1% Accuracy (0°C to 85°C)
• Internal Soft Start:
• TPS54290: 5.2 ms
• TPS54291: 2.6 ms
• TPS54292: 1.3 ms

• Dual PWM Outputs 180° Out-of-Phase
• Dedicated Enable for Each Channel
• Current Mode Control for Simplified Compensation
• External Compensation
• Pulse-by-Pulse Overcurrent Protection, 2.2-A and 3.8-A Overcurrent Limit
• Integrated Bootstrap Switch
• Thermal Shutdown Protection at 145°C
• 16-Pin PowerPAD™ HTSSOP Package
• APPLICATIONS
• Set-Top Boxes
• Digital TVs
• Power for DSP
• Consumer Electronics

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