LM3370中文资料具有动态电压调节功能的双路同步降压直流/直流转换器数据手册TI规格书

描述 Description

The LM3370 is a dual step-down DC-DC converter optimized for powering ultra-low voltage circuits from a single Li-Ion battery and input rail ranging from 2.7V to 5.5V. It provides two outputs with 600mA load per channel. The output voltage range varies from 1V to 3.3V and can be dynamically controlled using the I2C-compatible interface. This dynamic voltage scaling function allows processors to achieve maximum performance at the lowest power level. The I2C-compatible interface can also be used to control auto PFM-PWM/PWM mode selection and other performance enhancing features. The LM3370 offers superior features and performance for portable systems with complex power management requirements. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system efficiency. Internal synchronous rectification enhances the converter efficiency without the use of further external devices. There is a power-on-reset function that monitors the level of the output voltage to avoid unexpected power losses. The independent enable pin for each output allows for simple and effective power sequencing. LM3370 is available in a 4mm by 5mm 16-lead non-pullback WSON and a 20-bump DSBGA, 3.0mm x 2.0mm x 0.6mm, package. A high switching frequency—2 MHz (typ)—allows use of tiny surface-mount components including a 2.2µH inductor. Default fixed voltages for the 2 output voltages combination can be customized to fit system requirements by contacting Texas Instruments.

特性 Features

• I2C-compatible interface
• VOUT2 = 1.8V to 3.3V in 100 mV Steps
• Spread Spectrum Capability Using I2C
• 600mA Load Per Channel
• The Bucks Operate 180° Out-of-Phase Timing Offset for Noise and Input Surge Current Abatement
• Internal Soft Start
• 2.7V ≤ VIN ≤ 5.5V
• 2.2µH Inductor, 4.7µF Input and 10µF Output Capacitor Per Channel
• 20-Bump DSBGA Package (3.0 mm x 2.0 mm x 0.6 mm)

简介

LM3370属于集成电路（IC）的稳压器-DC-DC开关稳压器。由TI制造生产的LM3370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。