TPS40009 - 低输入 (2.25V-5.5V) 600 kHz 频率同步降压控制器，具有输出驱动/吸入和预偏置操作

TPS40009是TI德州仪器公司的一款控制器（外部开关）产品，TPS40009是低输入 (2.25V-5.5V) 600 kHz 频率同步降压控制器，具有输出驱动/吸入和预偏置操作，本站介绍了TPS40009的封装应用图解、特点和优点、功能等，并给出了与TPS40009相关的TI元器件型号供参考。

TPS40009 - 低输入 (2.25V-5.5V) 600 kHz 频率同步降压控制器，具有输出驱动/吸入和预偏置操作 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TPS4000x are controllers for low-voltage, non-isolated synchronous buck regulators. These controllers drive an N-channel MOSFET for the primary buck switch, and an N-channel MOSFET for the synchronous rectifier switch, thereby achieving very high-efficiency power conversion. In addition, the device controls the delays from main switch off to rectifier turn-on and from rectifier turn-off to main switch turn-on in such a way as to minimize diode losses (both conduction and recovery) in the synchronous rectifier with TI’s proprietary Predictive Gate Drive™ technology. The reduction in these losses is significant and increases efficiency. For a given converter power level, smaller FETs can be used, or heat sinking can be reduced or even eliminated.

The current-limit threshold is adjustable with a single resistor connected to the device. The TPS4000x controllers implement a closed-loop soft start function. Startup ramp time is set by a single external capacitor connected to the SS/SD pin. The SS/SD pin is also used for shutdown.

产品特性

Operating Input Voltage 2.25 V to 5.5 V
Output Voltage as Low as 0.7 V
1% Internal 0.7 V Reference
Predictive Gate Drive™ N-Channel MOSFET Drivers for Higher Efficiency
Externally Adjustable Soft-Start and Overcurrent Limit
Fixed-Frequency Voltage-Mode Control
- TPS40007, 300 kHz
- TPS40009, 600 kHz
Source/Sink with VOUT Prebias
10-Lead MSOP PowerPad™ Package for Higher Performance
Thermal Shutdown
Internal Boostrap Diode
APPLICATIONS
- Networking Equipment
- Telecom Equipment
- Base Stations
- Servers
- DSP Power
- Power Modules

PowerPAD and Predictive Gate Drive are trademarks of Texas Instruments Incorporated.

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