器件名称: SDB628
功能描述: DC/DC 28V 2A 升压IC
文件大小: 2372.5KB 共7页
简 介:Shouding
FEATURES
Integrated 80mΩ Power MOSFET 2V to 24V Input Voltage 1.2MHz Fixed Switching Frequency Internal 4A Switch Current Limit Adjustable Output Voltage Internal Compensation Up to 28V Output Voltage Automatic Pulse Frequency Modulation Mode at Light Loads up to 97% Efficiency Available in a 6-Pin SOT23-6 Package
SDB628
High Efficiency 1.2MHz 2A Step Up Converter
GENERAL DESCRIPTION
SDB628 is a constant frequency, 6-pin SOT23 The SDB current mode step-up converter intended for small, low power applications. The SDB628 switches at 1.2MHz and allows the use of tiny, low cost capacitors and inductors 2mm or less in height. Internal soft-start results in small inrush current and extends battery life. The SDB628 features automatic shifting to pulse frequency modulation mode at light loads. The SDB628 includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload. The SDB628 is available in a small 6-pin SOT-23 package.
APPLICATIONS
Battery-Powered Equipment Set-Top Boxed LCD Bais Supply DSL and Cable Modems and Routers Networking cards powered from PCI or PCI express slots
TYPICAL APPLICATION
Efficiency
Efficiency (%)
Iout (mA)
Figure 1. Basic Application Circuit
SD.14 www.shouding.net
Figure 2. Efficiency Curve
1
Shouding
ABSOLUTE MAXIMUM RATINGS
IN, EN voltages ………..….…… -0.3V to 26V Operating Temperature….... -40°C to +85°C FB Voltages ................................-0.……