TPS40040 - 具有使能端的 2.25V 至 5.5V 输入的 8 引脚 DC/DC 控制器

TPS40040是TI德州仪器公司的一款控制器（外部开关）产品，TPS40040是具有使能端的 2.25V 至 5.5V 输入的 8 引脚 DC/DC 控制器，本站介绍了TPS40040的封装应用图解、特点和优点、功能等，并给出了与TPS40040相关的TI元器件型号供参考。

TPS40040 - 具有使能端的 2.25V 至 5.5V 输入的 8 引脚 DC/DC 控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TPS40040 and TPS40041 dc-to-dc controllers are designed to operate from a 2.25-V to 5.5-V input source. To reduce the number of external components, several operating parameters are fixed internally; namely, frequency, soft start time, and short circuit protection (SCP) levels. For example, the operating frequencies of TPS40040/1 are 300 kHz/600 kHz, respectively.

One of three short circuit threshold levels may be selected by the addition of an external resistor from the COMP pin to circuit ground. During power on, and before the internal soft start commands the output voltage to rise, the TPS40040/1 enters a calibration cycle, measures the current out of the COMP pin, and selects an internal SCP threshold voltage. At the end of the 1.6-ms calibration time, the output voltage is allowed to rise for a 4-ms soft start. During operation, the selected SCP threshold voltage is compared to the upper MOSFET’s voltage drop during its ON time to determine whether there is an overload condition.

The packaging of the TPS40040/1 is unique in that the PowerPAD™ is used as an electrical ground connection as well as a thermal connection.

产品特性

2.25-V to 5.5-V Input
Output Voltage from 0.6 V to 90% of VIN
High-Side Drive for N-Channel FET
Supports Pre-Biased Outputs
Adaptive Anti-Cross Conduction Gate Drive
1%, 0.6-V Reference
Two Fixed Switching Frequency Versions, TPS40040 (300 kHz) and TPS40041 (600 kHz)
Three Selectable Short Circuit Protection Levels of 105 mV, 180 mV and 310 mV
Hiccup Restart from Faults
Voltage Mode Control
Active Low Enable
Thermal Shutdown Protection at 145°C
8-Pin, 3-mm × 3-mm SON with Ground Connection to Thermal Pad
APPLICATIONS
- Point of Load
- Telecommunications
- DC to DC Modules
- Set Top Boxes

PowerPAD Is a trademark of Texas Instruments. Predictive Gate Drive Is a trademark of Texas Instruments.

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