TPS54291 - 4.5V 至 18V 输入、1.5/2.5A 双路同步降压 SWIFT? 转换器

TPS54291是TI德州仪器公司的一款转换器（集成开关）产品，TPS54291是4.5V 至 18V 输入、1.5/2.5A 双路同步降压 SWIFT? 转换器，本站介绍了TPS54291的封装应用图解、特点和优点、功能等，并给出了与TPS54291相关的TI元器件型号供参考。

TPS54291 - 4.5V 至 18V 输入、1.5/2.5A 双路同步降压 SWIFT? 转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

TPS54290/1/2 is a dual output fully synchronous buck converter 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. Channel1 can provide up to 1.5 A of continuous current, meanwhile, Channel2 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.

产品特性

4.5 V to 18 V Input Range
Output Voltage Range 0.8 V to DMAX × VIN
Fully Integrated Dual Buck, 1.5 A/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/3.8 A Overcurrent Limit
Integrated Bootstrap Switch
Thermal Shutdown Protection at 145°C
16-Pin PowerPAD HTSSOP Package
APPLICATIONS
- Set Top Box
- Digital TV
- Power for DSP
- Consumer Electronics

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