LM20154 - 具有同步输出的 4A、1MHz 同步降压稳压器

LM20154是TI德州仪器公司的一款转换器（集成开关）产品，LM20154是具有同步输出的 4A、1MHz 同步降压稳压器，本站介绍了LM20154的封装应用图解、特点和优点、功能等，并给出了与LM20154相关的TI元器件型号供参考。

LM20154 - 具有同步输出的 4A、1MHz 同步降压稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM20154 is a full featured 1 MHz synchronous buck regulator capable of delivering up to 4A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20154 features an open drain SYNCOUT pin which provides an external clock that matches the switching frequency of the device but is shifted by 180 degrees.

The LM20154 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20154 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20154 is offered in an exposed pad 16-pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.

产品特性

LM20154-Q1 is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
Input Voltage Range 2.95V to 5.5V
Accurate Current Limit Minimizes Inductor Size
96% Peak Efficiency at 1.0 MHz Switching Frequency
Frequency Synchronization Output
32 m? Integrated FET Switches
Starts up into Pre-Biased Loads
Output Voltage Tracking
Peak Current Mode Control
Adjustable Output Voltage Down to 0.8V
Adjustable Soft-Start with External Capacitor
Precision Enable Pin with Hysteresis
Integrated OVP, UVLO, Power Good and Thermal Shutdown
HTSSOP Exposed Pad Package

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