描述 Description

The MIC281 is a digital thermal sensor capable of measuring the temperature of a remote PN junction. It is optimized for applications favoring low cost and small size. The remote junction may be an inexpensive commodity transistor, e.g., 2N3906, or an embedded thermal diode such as found in Intel Pentium* II/III/IV CPUs, AMD Athlon* CPUs, and Xilinx Virtex* FPGAs.The MIC281 is 100% software and hardware backward compatible with the MIC280 and features the same industry-leading noise performance and small size. The advanced integrating A/D converter and analog front-end reduce errors due to noise for maximum accuracy and minimum guardbanding.A 2-wire SMBus 2.0-compatible serial interface is provided for host communication. The clock and data pins are 5V-tolerant regardless of the value of VDD. They will not clamp the bus lines low even if the device is powered down.Superior performance, low power, and small size make the MIC281 an excellent choice for cost-sensitive thermal management applications.

特性 Features

? Remote temperature measurement using embedded thermal diodes or commodity transistors
? Accurate remote sensing ±3°C max., 0°C to 100°C
? Excellent noise rejection
? I2C and SMBus 2.0 compatible serial interface
? SMBus timeout to prevent bus lockup
? Voltage tolerant I/Os
? Low power shutdown mode
? Failsafe response to diode faults
? 3.0V to 3.6V power supply range
? IttyBitty??SOT23-6 Package

簡介

MIC281屬于集成電路（IC）的線性穩(wěn)壓器控制器。由制造生產(chǎn)的MIC281穩(wěn)壓器 - 線性 + 開關此產(chǎn)品族中的產(chǎn)品用于構建執(zhí)行 DC-DC 轉換或電壓調(diào)節(jié)功能的電路，采用的是開關模式和線性穩(wěn)壓器功能的組合。雖然具體的拓撲各不相同，但此類產(chǎn)品的主要目的是將開關模式技術的效率優(yōu)勢與線性穩(wěn)壓技術的低噪聲特性結合在一起。