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.

• 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.

• Vin (Min) (V)
• 2.25
• Vin (Max) (V)
• 5.5
• Vout (Min) (V)
• 0.6
• Vout (Max) (V)
• 4.95
• Iout (Max) (A)
• 15
• Iq (Typ) (uA)
• 2000
• Switching frequency (Min) (kHz)
• 300
• Switching frequency (Max) (kHz)
• 300
• Features
• Enable, Pre-Bias Start-Up, Synchronous Rectification
• Regulated outputs (#)
• 1
• Number of phases
• 1
• Rating
• Catalog

TPS40040的完整型号有：TPS40040DRBR、TPS40040DRBT，以下是这些产品的关键参数及官网采购报价：

TPS40040DRBR，工作温度：-40 to 85，封装：SON (DRB)-8，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS40040DRBR的批量USD价格：.561（1000+）

TPS40040DRBT，工作温度：-40 to 85，封装：SON (DRB)-8，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS40040DRBT的批量USD价格：.673（1000+）

TPS40040EVM-001 — 5V 输入、1.8V 输出、10A 同步降压评估模块

The TPS40040EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed1.8V output at up to 10A from a 5V input bus. The EVM is designed to start up from a single supply, so no additional bias voltage is required for startup. The module uses the TPS40040 (...)

TPS40041EVM-001 — TPS40041 5V 输入、1.8V 输出、6A 评估模块

The TPS40041EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed1.8V output at up to 6A from a 5V input bus or 3A from a 3.3V input. The EVM is designed to start up from a single supply, so no additional bias voltage is required for (...)

TPS40040/1 Unencrypted PSpice Average Model Package (Rev. A)

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

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在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)