Summit SMB20x DC-DC电源转换方案
Summit 公司的SMB20x/20xA是高度集成和灵活的单/双输出 DC-DC电源稳压器，包括有单/双路DC/DC降压稳压器和提供高达1A/2A/4A连续输出电流的高边MOSFET开关。可编程输出低至0.8V。输入电压从+4.5V 到 +16V，输出电压+0.8V 到+5.0V，电压精度+/-2.5% 。PWM频率500kHz或1MHz，主要用在数字LCD/等离子TV，数字STB/PVR/DVR以及数据通信/电信设备。本文介绍SMB20X主要特性，以及SMB207，SMB208和SMB209的详细应用电路图和相应的材料清单（BOM）。
The SMB20X/20XA are a highly integrated and flexible Single/Dual-output DC-DC regulator designed for use in a wide variety of applications. High integration reduces system cost, component count and development time while the built-in nonvolatile digital programmability allows system designers to custom tailor the device to suit almost any application.
The SMB20X/20XA include single/dual DC-DC step-down regulators with integrated high-side MOSFET switches for up to 1A/2A/4A continuous output current. Programmable output voltages as low as +0.8V support the latest VLSI digital cores.
Minimum external components result in a very compact solution size for space constrained applications. Also sophisticated power control/monitoring functions required by many systems are built-in and accessible via digital I2C interface.
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