TPS54061QDRBRQ1

TPS54061-Q1 器件是一款 60V，200mA，同步降压 dc-dc 转换器，此转换器具有高侧和低侧 MOSFET。电流模式控制提供简单的外部补偿和灵活的组件选择。非开关电源电流为 90μA。使能引脚的使用将关断电流减少至 1.4μA。 为了增加轻负载效率，当电感器电流达到零值时，低侧 MOSFET 仿真一个二极管。 内部欠压闭锁设置值为 4.5V，但是在使能引脚上使用 2 个电阻器能够增加此设置值。内部缓启动时间控制输出电压启动斜升。 可调开关频率范围可实现效率和外部组件尺寸的优化。 频率折返和热关断功能负责在过载情况下保护器件。 TPS54061-Q1 通过集成 MOSFET，引导再充电二极管，以及将集成电路(IC) 封装尺寸大大减小为小型 3mm×3mm 散热增强型超薄小外形尺寸无引线(VSON) 封装来实现小型设计。

The TPS54061-Q1 device is a 60 V, 200 mA, step-down (buck) regulator with integrated high-side and low-side n-channel MOSFETs. To improve performance during line and load transients, the device implements a constant-frequency, current-mode control which reduces output capacitance and simplifies external frequency - compensation design. The switching frequency of 50 kHz to 1100 kHz allows for efficiency and size optimization when selecting the output filter components. Adjustment of the switching frequency is by use of a resistor to ground on the RT/CLK pin. The device has an internal phase - lock loop (PLL) on the RT/CLK pin that synchronizes the power - switch turnon to a falling edge of an external system clock. The TPS54061-Q1 has a default start - up voltage of approximately 4.5 V. The EN pin has an internal pullup current source, a possible use of which is to adjust the input voltage undervoltage lockout (UVLO) threshold with two external resistors. In addition, the pullup current provides a default condition. When the EN pin is floating, the device operates. The operating current is 90 μA when not switching and under no load. When the device is disabled, the supply current is 1.4 μA. The integrated 1.5 - Ω high - side MOSFET and 0.8–Ω low - side MOSFET allow for high - efficiency power - supply designs capable of delivering 200 milliamperes of continuous current to a load. The TPS54061-Q1 reduces the external component count by integrating the boot recharge diode. A capacitor between the BOOT and PH pins supplies the bias voltage for the integrated high - side MOSFET. The boot capacitor voltage is monitored by an UVLO circuit and will turn the high side MOSFET off when the boot voltage falls below a preset threshold. The TPS54061-Q1 can operate at high duty cycles because of the boot UVLO. The output voltage can be adjusted down to as low as the 0.8 V reference. The TPS54061-Q1 has an internal output OV protection that disables the high side MOSFET if the output voltage is 109% of the nominal output voltage. The TPS54061-Q1 reduces external component count by integrating the slow start time using a reference DAC system. The TPS54061-Q1 resets the slow start times during overload conditions with an overload recovery circuit. The overload recovery circuit will slow start the output from the fault voltage to the nominal regulation voltage once a fault condition is removed. A frequency foldback circuit reduces the switching frequency during startup and overcurrent fault conditions to help control the inductor current.

• 符合汽车应用要求
• 具有符合 AEC - Q100 的下列结果：
  • 器件温度 1 级：-40°C 至 125°C 的环境运行温度范围
  • 器件人体模型(HBM) 静电放电(ESD) 分类等级 H2
  • 器件充电器件模型(CDM) ESD 分类等级 C3B
• 集成型高侧和低侧金属氧化物半导体场效应晶体管(MOSFET)
• 针对轻负载效率的二极管仿真
• 峰值电流模式控制
• 90μA 运行静态电流
• 1.4μA 关断电源电流
• 50KHz 至 1.1MHz 可调节开关频率
• 同步至外部时钟
• 0.8V±1% 电压基准
• 与陶瓷输出电容器或者低成本铝制电解电容器一起工作时保持稳定
• 逐周期电流限制、过热、过压保护(OVP) 和频率折返保护
• 带散热垫的 3mm x 3mm 封装
• -40°C 至 150°C 运行结温

• 低功耗待机或偏置电压电源
• 高压线性稳压器的高效替代产品