SY8105IADC

Silergy
High Efficiency, Fast Response, 5.0A, 18V Input Synchronous Step Down Regulator
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Технические характеристики

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Корпус SOT236
Тип преобразователя
Входное напряжение
Выходное напряжение
Максимальный выходной ток
Кол-во выходов
Частота преобразования
Ток собственного потребления
Рабочая температура
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Application Note: SY8105I High Efficiency, Fast Response, 5.0A, 18V Input Synchronous Step Down Regulator General Description Features • The SY8105I is a high efficiency 500kHz synchronous step-down DC/DC regulator, which is capable of delivering up to 5A load current. It can operate over a wide input voltage range from 4.5V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. • • • • • The SY8105I adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at pseudo-constant frequency of 500kHz to minimize the size of inductor and capacitor. • • • • • • Ordering Information Applications SY8105 □(□□)□ • • • • • • Temperature Code Package Code Optional Spec Code Ordering Number SY8105IADC Low RDS(ON) for Internal Switches (Top/Bottom): 41mΩ/27mΩ 4.5-18V Input Voltage Range 5A Output Current Capability 500kHz Switching Frequency Minimize the External Components Stable with 22µF COUT and 0.68µH Inductor Instant PWM Architecture to Achieve Fast Transient Responses Internal Soft-Start Limits the Inrush Current Cycle-by-cycle Peak/Valley Current Limitation Hiccup Mode Output Short Circuit Protection Thermal Shutdown with Auto Recovery Output Auto Discharge Function Compact Package: TSOT23-6 Package type TSOT23-6 Note ---- Set Top Box Portable TV DSL Modem LCD TV IP CAM Networking Typical Applications CBS 100nF L 3.3µH BS IN SY8105I CIN 10µF Efficiency vs. Load Current VOUT: 3.3V LX EN FB GND 100 RH 100k CFF 100pF RL 22.1k Figure1. Schematic Diagram Inductor and COUT Selection Table COUT [µF] L [µH] 10 22 22+10 2×22 0.68 √ √ √ 1.2 1.5 √ √ ☆ 1.5 √ √ √ 3.3 3.3 √ √ ☆ 2.2 √ √ √ 5 4.7 √ √ ☆ Note: ‘☆’ means recommended for most applications. VOUT [V] AN_SY8105I Rev0.9A © 2022 Silergy Corp. COUT 22µF+10µF 95 90 Efficiency (%) VIN :4.5~18V 85 80 75 VIN=5V,VOUT=3.3V 70 VIN=12V,VOUT=3.3V 65 VIN=18V,VOUT=3.3V 60 0.01 0.1 1 10 Load Current (A) Figure2. Efficiency vs. Output Current 1 All Rights Reserved. PDF
Документация на SY8105IADC 

Author: owner

Дата модификации: 26.12.2023

Размер: 1.4 Мб

14 стр.

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