MIC5399-SSYMX-TR屬于集成電路（IC）的線性+開關穩(wěn)壓器。由微芯科技股份有限公司制造生產的MIC5399-SSYMX-TR穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉換為熱量。對于大多數應用而言，雖然這種穩(wěn)壓器的效率低于開關模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應用。

General Description

The MIC5396, MIC5397, MIC5398, and MIC5399 are

advanced dual LDOs ideal for powering general

purpose portable devices. The MIC5396/7/8/9 provide

two high performance, independent 300 mA LDOs in a

single package. This makes it possible to improve

system efficiency by providing two independent supply

inputs that can be optimized for each individual LDO.

The MIC5396/7/8/9 also feature a wide output voltage

range down to 1.0V.

Its full feature set and low dropout voltage make it ideal

for battery-powered applications. The MIC5396/7/8/9

offer 2 accuracy, low dropout voltage (160 mV at

300 mA), and low ground current (typically 42 μA per

LDO at full load). The MIC5396/7/8/9 can also be put

into a zero off mode current state, drawing virtually no

current when disabled.

When the MIC5397 or MIC5399 are disabled, an

internal resistive load is automatically applied to the

output to discharge the output capacitor. In addition,

the MIC5398 and MIC5399 offer an internal enable

pull-down resistor to ensure that the output is disabled

when the enable is in tri-state mode. These LDOs also

offer fast transient response and high PSRR while

consuming a minimum operating current. The family is

available in a tiny 8-lead, 1.6 mm x 1.2 mm leadless

Extra Thin DFN package.

特性 Features

? 2.5V to 5.5V Input Voltage Range

? Independent Power Inputs

? Output Voltage Range from 1V to 3.3V

? Two 300 mA Outputs

? High Output Accuracy (±2)

? Low Quiescent Current (37 μA typ. per LDO)

? Stable with 1 μF Ceramic Output Capacitors

? Low Dropout Voltage (160 mV at 300 mA)

? Independent Enable Pins

? Internal Enable Pull-Down (MIC5398, MIC5399)

? Output Discharge Circuit (MIC5397, MIC5399)

? Thermal Shutdown Protection

? Current Limit Protection

? 8-Lead 1.6 mm × 1.2 mm Extra Thin DFN Package

Applications

? Smartphones

? DSC, GPS, PMP and PDAs

? Medical Devices

? Portable Electronics