ADI ADP2325双路5A 20V同步降压电源解决方案
ADI公司的ADP2325是双路5A 20V同步降压DC/DC稳压器,集成了两个高边功率MOSFET和两个用来驱动外接N沟MOSFET的低边驱动器.两个PWM通路可配置成两路5A或10A输出,输入电压4.5V到20V,输出电压低至0.6V,主要用在通信设备,网络和服务器,工业和仪表,医疗保健等.本文介绍了ADP2325主要特性,功能方框图,多种典型应用电路,以及评估板ADP2325-EVALZ主要特性,电路图,材料清单和PCB元件布局图.
The ADP2325 is a full featured, dual output, step-down dc-to-dc regulator based on a current mode architecture. The ADP2325 integrates two high-side power MOSFETs and two low-side drivers for the external N-channel MOSFETs. The two pulse-width mod-ulation (PWM) channels can be configured to deliver dual 5 A outputs or a parallel-to-single 10 A output. The regulator operates from input voltages of 4.5 V to 20 V, and the output voltage can be as low as 0.6 V.
The switching frequency can be programmed from 250 kHz to 1.2 MHz, or it can be synchronized to an external clock to minimize interference in multirail applications. The dual PWM channels run 180° out of phase, thereby reducing input current ripple as well as reducing the size of the input capacitor.
The bidirectional synchronization pin can be programmed at a 60°, 90°, or 120° phase shift to provide for a stackable, multi-phase power solution.
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