The TPS40304A is a cost-optimized synchronous buck controller that operates from 3-V to 20-V input. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to input voltage change. The switching frequency is fixed at 600 kHz.

Frequency Spread Spectrum feature adds dither to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS40304A offers design with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.

The OCP level is programmed by a single external resistor connected from LDRV pin to circuit ground. During initial power on, the TPS40304A enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS40304A then enters a shutdown and restart cycle until the fault is removed.

• Input Voltage Range from 3 V to 20 V
• Fixed 600-kHz Switching Frequency
• High- and Low-Side FET RDS(on) Current Sensing
• Programmable Thermally Compensated OCP Levels
• Programmable Soft-Start
• 591-mV, 1% Reference Voltage
• Voltage Feed-Forward Compensation
• Supports Pre-Biased Output
• Frequency Spread Spectrum
• Thermal Shutdown Protection at 145°C
• 10-Pin 3 mm × 3 mm SON Package with Ground Connection to Thermal Pad
• APPLICATIONS
  • POL Modules
  • Printer
  • Digital TV
  • Telecom

• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 20
• Vout (Min) (V)
• 0.6
• Vout (Max) (V)
• 18
• Iout (Max) (A)
• 25
• Iq (Typ) (uA)
• 2500
• Switching frequency (Min) (kHz)
• 600
• Switching frequency (Max) (kHz)
• 600
• Features
• Enable, Power Good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification
• Regulated outputs (#)
• 1
• Number of phases
• 1
• Rating
• Catalog

TPS40304A的完整型号有：TPS40304ADRCR、TPS40304ADRCT，以下是这些产品的关键参数及官网采购报价：

TPS40304ADRCR，工作温度：-40 to 145，封装：VSON (DRC)-10，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：NIPDAUAG，TI官网TPS40304ADRCR的批量USD价格：.411（1000+）

TPS40304ADRCT，工作温度：-40 to 145，封装：VSON (DRC)-10，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：NIPDAUAG，TI官网TPS40304ADRCT的批量USD价格：.493（1000+）

TPS40304EVM-353 — 具有 NexFET™ 功率 MOSFET 的 8-14V 输入电压、1.2V 输出电压同步降压控制器评估模块

TPS40304EVM-353 评估模块是一款同步降压控制器，可通过标称 12V 输入总线，在高达 20A 的电流下提供 1.2V 输出。根据设计，EVM 采用单电源启动，而无需附加的偏置电压。该模块使用我们的 NexFET™ 高性能 MOSFET，从而提高功率密度和效率。

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