Programmable Output High-Speed Step-Down Controller for Notebook Computer CXSD62362A/CXSD62362B PWM controller uses constant on-time control scheme to handle wide input/output voltage ratios with ease

   产品概述 返回TOPzMc嘉泰姆

     CXSD62362A/CXSD62362B PWM controller uses constant on-time control scheme to handle wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The CXSD62362A/CXSD62362 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous rectifier MOSFETs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size. The CXSD62362/CXSD62362 is intended for CPU core, chipset, DRAM, or other low-voltage supplies as low as 0.75V. It provides four resistor-programmable output voltages by G0 and G1 digital inputs. The CXSD62362/CXSD62362 is available in 16-pin TQFN (3X3) package.

   产品特点 返回TOPzMc嘉泰姆

„ Ultra-High Efficiency zMc嘉泰姆

„ No Current-Sense Resistor (Lossless ILIMIT) zMc嘉泰姆

„ Quasi-PWM with 100ns Load-Step Response zMc嘉泰姆

„ 1% VOUT Accuracy Over Line and Load zMc嘉泰姆

„ 0.75V to 3.6V Adjustable Output Range zMc嘉泰姆

„ Dynamic Voltage Scaling by G0 and G1 Inputs zMc嘉泰姆

„ 4.5V to 24V Battery Input Range zMc嘉泰姆

„ OVP & UVP zMc嘉泰姆

„ Built-in BST Diode zMc嘉泰姆

„ 1.7ms Soft-Start zMc嘉泰姆

„ Drives Large Synchronous-Rectifier FETs zMc嘉泰姆

„ Power-Good Indicator zMc嘉泰姆

„ G0/G1 High Active (CXSD62362A) G0/G1 Low Active (CXSD62362B)zMc嘉泰姆

   应用范围 返回TOPzMc嘉泰姆

„ Notebook Computers zMc嘉泰姆

„ CPU Core Supply zMc嘉泰姆

„ Chipset/RAM Supply as Low as 0.75V zMc嘉泰姆

„ 1.8V and 2.5V I/O Supply zMc嘉泰姆

„ Networking Power SupplyzMc嘉泰姆

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