TPS61289数据手册TI中文资料规格书

描述 Description

The TPS61289 is a bidirectional buck/boost synchronous converter that integrates the high-side synchronous rectifier MOSFET and uses an external low side MOSFET. The TPS61289 can be configured as a buck or boost converter using the MODE pin. The TPS61289 can support 20A switching current and the VHIGH voltage supports up to 25V. The minimum VLOW voltage is determined by the VLOW/VHIGH ratio and frequency, for example, the VLOW voltage can support as low as 0.5V at the VHIGH = 15V condition. The device provides an excellent balance of efficiency, thermal dissipation and solution size for high power bidirectional conversion.

The TPS61289 offers adjustable switching current limit function. In addition, the device provides VHIGH overvoltage and undervoltage protection, cycle-by-cycle overcurrent protection, and thermal shutdown protection.

The TPS61289 offers a very small solution size with 2.5mm x 3.0mm VQFN HotRod™ Lite package with minimal external components.

特性 Features

• VLOW voltage range: 0.5V to 23V
• The minimum VLOW voltage is determined by the VLOW/VHIGH ratio and frequency

• VHIGH voltage range: 4.5V to 25V
• Pin selectable bidirectional buck or boost mode
• Buck/boost forced PWM mode operation
• High efficiency and power capability
• Programmable current limit: 5A to 20A
• Integrated 8.5mΩ high-side MOSFET

• Switching frequency
• F SW 250kHz when VLOW > 1.7V
• F SW down to 100kHz when VLOW
• Synchronization capability to external clock
• Rich protection
• VHIGH overvoltage protection at 27V
• VHIGH undervoltage protection at 3.1V
• VCC undervoltage protection at 2.15V
• Precise EN/UVLO threshold
• Cycle-by-cycle overcurrent protection
• Thermal shutdown

• 2.5mm × 3.0mm VQFN 14 HotRod™ Lite package