LT8643S集成電路（IC）的穩(wěn)壓器-DC-DC開關穩(wěn)壓器規(guī)格書PDF中文資料

LT8643S屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關穩(wěn)壓器。由亞德諾半導體技術有限公司制造生產的LT8643S穩(wěn)壓器 - DC-DC 開關穩(wěn)壓器DC-DC 開關穩(wěn)壓器 PMIC（電源管理集成電路）產品族中的產品是元器件級設備，用于需要穩(wěn)定 DC 輸入電壓和/或將其轉換為不同幅度的輸出電壓的應用。這些器件與稱為“控制器”PMIC 的類似產品的區(qū)別在于集成了主開關元件，設備提供的電力會通過該元件。

DESCRIPTION

The LT?8645S-2 synchronous step-down regulator features

Silent Switcher architecture designed to minimize

EMI emissions while delivering high efficiency at high

switching frequencies. This performance makes the

LT8645S-2 ideal for noise sensitive applications and

environments.

The fast, clean, low-overshoot switching edges enable

high efficiency operation even at high switching frequencies,

leading to a small overall solution size. Peak current

mode control with a 40ns minimum on-time allows high

step-down ratios even at high switching frequencies.

Burst Mode? operation enables ultralow standby current

consumption, pulse-skipping mode allows full switching

frequency at lower output loads, or spread spectrum

operation can further reduce EMI emissions.

FEATURES

- Silent Switcher? Architecture

- Ultralow EMI Emissions

- Optional Spread Spectrum Modulation

- High Efficiency at High Frequency

- Up to 95 Efficiency at 1MHz, 12VIN to 5VOUT

- Up to 94 Efficiency at 2MHz, 12VIN to 5VOUT

- Wide Input Voltage Range: 3.4V to 65V

- Ultralow Quiescent Current Burst Mode Operation

- 2.5μA IQ Regulating 12VIN to 3.3VOUT

- Output Ripple < 10mVP-P

- Fast Minimum Switch On-Time: 40ns

- Low Dropout Under All Conditions: 60mV at 1A

- Adjustable and Synchronizable: 200kHz to 2.2MHz

- Peak Current Mode Operation

- Output Soft-Start and Tracking

- Small 32-Lead 6mm × 4mm LQFN Package

- AEC-Q100 Qualified for Automotive Applications

APPLICATIONS

- Automotive and Industrial Supplies

- General Purpose Step-Down

- GSM Power Supplies