TPS54062DGKR开关稳压器4.7-60Vin原装TI

1 Features

1• Integrated High-Side and Low-Side MOSFET

• Peak Current Mode Control

• Diode Emulation for Improved Light-Load

Efficiency

• 89 μA (typical) Operating Quiescent Current

• 100-kHz to 400-kHz Adjustable Switching

Frequency

• Synchronizes to External Clock

• Internal Slow-Start

• 0.8 V ±2% Voltage Reference

• Stable with Ceramic Output Capacitors or LowCost

Aluminum Electrolytic

• Cycle-by-Cycle Current Limit, Thermal and

Frequency Foldback Protection

• MSOP-8 and 3mm × 3mm VSON-8 Packages

2 Applications

• Low-Power Standby or Bias Voltage Supplies

• 4-20 mA Current-Loop Powered Sensors

• Industrial Process Control, Metering, and Security

Systems

• High Voltage Linear Regulator Replacement

3 Description

The TPS54062 device is a 60-V, 50-mA, synchronous

step-down converter with integrated high-side and

low-side MOSFETs. Current mode control provides

simple external compensation and flexible component

selection. The non-switching supply current is 89 μA.

Using the enable pin, shutdown supply current is

reduced to 1.7 μA.

Undervoltage lockout is internally set at 4.5 V, but

can be increased using the accurate enable pin

threshold. The output voltage start-up ramp is

controlled by the internal slow-start time.

Adjustable switching frequency range allows

efficiency and external component size to be

optimized. Frequency foldback and thermal shutdown

protects the part during an overload condition.

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1功能

•集成高侧和低侧MOSFET

•峰值电流模式控制

•二极管模拟改进轻负载

效率

•89年μA(典型的)操作静态电流

•100- 400 khz可调开关

频率

与外部时钟同步

•内部缓慢的开始

•0.8 V电压参考±2%

•稳定的陶瓷输出电容器或低成本

铝电解

•循环电流极限、热极限和

监听频率保护

•MSOP-8 VSON-8包和3毫米×3毫米

2应用程序

•低功率备用或偏置电压电源

•4- 20ma电流环驱动传感器

•工业过程控制、计量和安全

系统

•高压线性调节器更换

3描述

TPS54062设备是60-V, 50-mA同步的

降压变频器，集成了高侧和高侧

下部mosfet。电流模式控制

简单的外部补偿和灵活的组件

选择。89μA non-switching供应电流。

使用使能销，关机电源电流是

减少到1.7μA。

欠压锁定内部设置为4.5 V，但是

可以增加使用准确的启用pin

阈值。输出电压启动斜坡为

由内部慢启动时间控制。

可调节开关频率范围

效率和外部元件尺寸要一致

优化。频率折叠和热停堆

在过载情况下保护部件。