UCD74111RVFR集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF中文资料

UCD74111RVFR属于集成电路（IC）的稳压器-DC-DC开关稳压器。由德州仪器制造生产的UCD74111RVFR稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。

1FEATURES

2• Integrates Synchronous Buck Driver and

NexFET™ Power MOSFET Technology for

High Power Density and High Efficiency

• 15-A Output Current Capability for DSP and

ASIC

• 4.7-V to 14-V Input Voltage Range

• Operational Switching Frequency Up to 2 MHz

• Built-In High-Side Current Protection

• DCR Current Sensing for Overcurrent

Protection and Output Current Monitoring

• Voltage Proportional to Load Current Monitor

Output

• Tri-State PWM Input for Power Stage

Shutdown

• UVLO Housekeeping Circuit

• Integrated Thermal Shutdown

• 40-Pin, 5 mm x 7 mm, PQFN PowerStack™

Package

APPLICATIONS

• Digital or Analog POL Power Modules

• High Power Density DC-DC Converters for

Telecom and Networking Applications

DESCRIPTION

UCD74111 is a multi-chip module integrating a driver

device and two NexFET power MOSFETs into a

thermally enhanced compact, 5 mm × 7 mm, QFN

package. A 15-A output current capability makes the

device suitable for powering DSP and ASIC. The

device is designed to complement digital or analog

PWM controllers. The PWM input of the driver device

is 3-state compatible. Two driver circuits provide high

charge and discharge current for the high-side N-

channel FET switch and the low-side N-channel FET

synchronous rectifier in a synchronous buck

converter.

A precision current sensing amplifier that processes

the voltage present across an external current sense

element measures and monitors the output current.

The PWM controller on the IMON pin can use this

amplified signal. On-board comparators monitor the

voltage across the high-side switch and the voltage

across the external current sense element to

safeguard the power stage from sudden high-current

loads. A single resistor for the high-side comparator

sets the blanking delay. This delay guards against

false reports coincident with switching edge noise. In

the event of a high-side fault or an overcurrent fault,

the high-side FET turns OFF and the fault flag (FLT)

asserts to alert the PWM controller.