400kHz开关频率2V至24V电池输入同步buck-PWM控制器3-a源线性调节器和缓冲基准CXSD62361/A VDDQ输出的OVP和UVP | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
目录7.相关产品 产品概述 返回TOP and VTTREF in S5 (Shutdown). The CXSD62361/A provides OVP, UVP, over The CXSD62361/A is intended for DDR/SSTL-2, DDRII/SSTL-18 and DDRIII memory systems. It integrates a synchronous buck PWM controller with a 3-A sink-source linear regulator and buffered reference. The 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 CXSD62361/A 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. The 3A sink/source tracking termination regulator is specifically designed for low-cost/ low-external component count systems. The regulator contains a high speed operational amplifier that provides fast load transient response with only 20μF (2x10μF) of ceramic output capacitance. The CXSD62361/A supports remote sensing functions and all features required to power the DDR /DDRII /DDRIII VTT bus termination according to the JEDEC specification. In addition, the CXSD62361/A includes integrated sleep-state controls placing VTT in High-Z in S3 (suspend to RAM) and soft-off for VTT current and thermal shutdown protection functions and is available in a 20-pin 3X3 TQFN package and 24-pin 4X4 TQFN includes over voltage protection.产品特点 返回TOP •Synchronous Buck Controller (VDDQ) „ Ultra-High Efficiency „ No Current-Sense Resistor (Lossless ILIMIT) „ Quasi-PWM with 100ns Load-Step Response „ 1.8V(DDRII) /1.5V(DDRIII) Fixed or Adjustable to 2.5V(DDR) or 0.75V to 3.6V Adjustable Output Range „ 2V to 24V Battery Input Range „ 400kHz Switching Frequency „ OVP & UVP of VDDQ Output „ Drives Large Synchronous-Rectifier FETs „ Power-Good Indicator •3-A LDO (VTT), Buffered Reference (VTTREF) „ Support DDR (1.25 VTT) , DDR II (0.9 VTT) and DDRIII(0.75 VTT) Requirements „ VLDOIN Voltage Range: 1.2V to 3.6V „ Requires Only 20μF Ceramic VTT Output Capacitance „ Supports High-Z in S3 and Soft-Off in S5 „ Integrated Divider Tracks 1/2 VDDQSNS for Both VTT and VTTREF „ Remote Sensing (VTTSNS) „ ±20mV Accuracy for VTT and VTTREF „ 10mA Buffered Reference (VTTREF) „ Built-In Soft-Start to Reduce the VLDOIN Surging Current „ Over Current Protection of VTT Output „ Thermal Shutdown Protection 应用范围 返回TOP „ Notebook Computers „ CPU Core Supply „ Chipset/RAM Supply as Low as 0.75V „ 1.8V and 2.5V I/O Supply 技术规格书（产品PDF) 返回TOP 需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！ 产品封装图 返回TOP
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400kHz开关频率2V至24V电池输入同步buck-PWM控制器3-a源线性调节器和缓冲基准CXSD62361/A VDDQ输出的OVP和UVP
发表时间：2020-05-21浏览次数：18
