LT8643S屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的LT8643S穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級(jí)設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會(huì)通過該元件。

FEATURES

n Silent Switcher ?2 Architecture

n Ultralow EMI Emissions on Any PCB

n Eliminates PCB Layout Sensitivity

n Internal Bypass Capacitors Reduce Radiated EMI

n Optional Spread Spectrum Modulation

n High Efficiency at High Frequency

n Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT

n Up to 95% Efficiency at 2MHz, 12VIN to 5VOUT

n Wide Input Voltage Range: 3.4V to 42V

n Output Voltage Range: 0.97V to 10V(LT8640S/LT8643S);

0.97V to (VIN – 0.5V) (LT8640SA/LT8643SA)

n 6A Maximum Continuous, 7A Peak Output

n Ultralow Quiescent Current Burst Mode? Operation

n 2.5μA IQ Regulating 12VIN to 3.3VOUT

(LT8640S/LT8640SA)

n Output Ripple < 10mVP-P

n External Compensation: Fast Transient Response and

Current Sharing (LT8643S/LT8643SA)

n Robust High VOUT Operation (LT8640SA/LT8643SA)

n Safely Tolerates High Reverse Current

n Fast Minimum Switch On-Time: 30ns

n Low Dropout Under All Conditions: 100mV at 1A

n Forced Continuous Mode

n Adjustable and Synchronizable: 200kHz to 3MHz

n Output Soft-Start and Tracking

n Small 24-Lead 4mm × 4mm LQFN Package

n AEC-Q100 Qualified for Automotive Applications

APPLICATIONS

n Automotive and Industrial Supplies