MIC4681数据手册集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF

描述 Description

The MIC4681 SuperSwitcher™ is an easy-to-use step-down (buck) voltage-mode switching regulator. The 200kHz MIC4681 achieves over 1A of continuous output current over a 4V to 30V input range in an 8-lead SOP package . The MIC4681 features a high 2.1A minimum current limit, making the device ideal for pulsed current applications such as GSM and TDMA cell phone battery chargers and power supplies. The MIC4681 sustains an output of 4.2V/2A within a typical GSM charging environment. The MIC4681 has an input voltage range of 4V to 30V, with excellent line, load, and transient response. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions. In shutdown mode, the regulator draws less than 6µA of standby current. The MIC4681 SuperSwitcher™ regulator requires a minimum number of external components and can operate using a standard series of inductors and capacitors. Frequency compensation is provided internally for fast transient response and ease of use. The MIC4681 is available in the 8-lead SOP with a -40°C to +125°C junction temperature range.

特性 Features

• SO-8 package with over 1A continuous output current
• Capable of 2A pulse charging for GSM applications
• All surface mount solution
• Only 4 external components required
• Fixed 200kHz operation
• Output adjustable down to 1.25V
• Internally compensated with fast transient response
• Wide operating input voltage range: 4V to 30V
• Less than 6µA typical shutdown-mode current
• Up to 90% efficiency
• Thermal shutdown
• Overcurrent protection

简介

MIC4681属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的MIC4681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。