LM3678 - 用于便携式应用的高性能、微型 1.5A 降压 DC-DC 转换器

LM3678是TI德州仪器公司的一款转换器（集成开关）产品，LM3678是用于便携式应用的高性能、微型 1.5A 降压 DC-DC 转换器，本站介绍了LM3678的封装应用图解、特点和优点、功能等，并给出了与LM3678相关的TI元器件型号供参考。

LM3678 - 用于便携式应用的高性能、微型 1.5A 降压 DC-DC 转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM3678 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5 V to 5.5 V. It provides up to 1.5-A load current, over the entire input voltage range. LM3678 offers a 0.8V or 1.2V option. One of the pair of voltages is set through the VSELECT pin.

LM3678 operates in PWM mode with a fixed frequency of 3.3 MHz. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01µA (typical).

The LM3678 is available in a 3mm x 3mm DSC-10 package. A high switching frequency of 3.3MHz (typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required (solution size less than 33 mm2). For voltages other than the voltage shown, contact TI or your distributor.

产品特性

VOUT = 0.8 V or 1.2 V
VIN = 2.5 V to 5.5 V
1.5-A Maximum Load Capability
3.3-MHz (Typical) PWM Fixed Switching Frequency Allows Use of 1-µH Inductor
±3% DC Output Voltage Precision
0.01-µA (Typical) Shutdown Current
Internal Synchronous Rectification for High Efficiency
Internal Soft Start
Current Overload and Thermal Shutdown Protection

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