CXSD62355

CXSD62355该PWM控制器采用恒导通控制方案,能够轻松地处理宽的输入/输出电压比,在保持相对恒定的开关频率的同时,对负载瞬态提供100ns的“瞬时通”响应。CXSD62355通过消除传统电流模式PWMs中的电流感应电阻,以较低的成本实现了高效率。驱动超大同步整流mosfet的能力进一步提高了效率。单级降压转换允许这些设备直接降压高压电池,以获得尽可能高的效率。

同步buck-PWM控制器2-a源线性调节器和缓冲基准CXSD62355用于DDR2 DDR3和DDR3L内存系统同步降压控制器VDDQ

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目录

1.产品概述       2.产品特点     0an嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)0an嘉泰姆

5.产品封装       6.电路原理图  0an嘉泰姆

7.相关产品0an嘉泰姆

   产品概述 返回TOP0an嘉泰姆


The CXSD62355 is intended for DDR2, DDR3 and DDR3L memory systems. It integrates a synchronous buck PWM controller with a 2-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 CXSD62355 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 2A 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 10μF of ceramic output capacitance. The CXSD62355 supports remote sensing functions and all features required to power the DDR2 /DDR3 /DDR3L VTT bus termination according to the JEDEC specification. In addition, the CXSD62355 includes integrated sleep-state controls placing VTT in High-Z in S3 (suspend to RAM) and soft-off for VTT and VTTREF in S4/S5 (Shutdown). The CXSD62355 provides OVP, UVP, over current and thermal shutdown protection functions and is available in a 20-pin 3X3 TQFN package.

   产品特点 返回TOP0an嘉泰姆


•Synchronous Buck Controller (VDDQ) 0an嘉泰姆

„ Ultra-High Efficiency at Light and Heavy Load with Auto-skip Function „ No Current-Sense Resistor (Lossless ILIMIT) 0an嘉泰姆

„ Quasi-PWM with 100ns Load-Step Response 0an嘉泰姆

„ 0.7V to 1.8V Adjustable Output Range 0an嘉泰姆

„ 3V to 28V Battery Input Range 0an嘉泰姆

„ 0.8% Vref Accuracy 0an嘉泰姆

„ Supports Soft-off in S4/S5 States0an嘉泰姆

„ Selectable 300k/400kHz Switching Frequency 0an嘉泰姆

„ OVP & UVP of VDDQ Output 0an嘉泰姆

„ Drives Large Synchronous-Rectifier FETs 0an嘉泰姆

„ Power-Good Indicator 0an嘉泰姆

•2-A LDO (VTT), Buffered Reference (VTTREF) 0an嘉泰姆

„ VLDOIN Voltage Range: 1.2 V to 3.6 V 0an嘉泰姆

„ Requires Only 10μF Ceramic VTT Output Capacitance 0an嘉泰姆

„ Supports High-Z in S3 and Soft-Off in S4/S50an嘉泰姆

„ Integrated Divider Tracks 1/2 VDDQSNS for Both VTT and VTTREF 0an嘉泰姆

„ Remote Sensing (VTTSNS) 0an嘉泰姆

„ ±20mV VTT and 0.8% VTTREF Accuracy 0an嘉泰姆

„ 10mA Buffered Reference (VTTREF) 0an嘉泰姆

„ Built-In Soft-Start to Reduce the VLDOIN Surging Current 0an嘉泰姆

„ Over Current Protection of VTT Output 0an嘉泰姆

„ Thermal Shutdown Protection0an嘉泰姆

   应用范围 返回TOP0an嘉泰姆


„ Notebook Computers 0an嘉泰姆

„ CPU Core Supply 0an嘉泰姆

„ Chipset/RAM Supply as Low as 0.7V0an嘉泰姆

   技术规格书(产品PDF) 返回TOP 0an嘉泰姆


     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0an嘉泰姆

 QQ截图20160419174301.jpg0an嘉泰姆

产品封装图 返回TOP0an嘉泰姆


image.png0an嘉泰姆

电路原理图 返回TOP0an嘉泰姆

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 0an嘉泰姆

Synchronous (Quasi-PWM) Step Down Controller0an嘉泰姆

Part   NO.0an嘉泰姆

Vin(V)0an嘉泰姆

min.0an嘉泰姆

Vin(V)0an嘉泰姆

max.0an嘉泰姆

VOUT0an嘉泰姆

(V)0an嘉泰姆

FSW0an嘉泰姆

(k Hz)0an嘉泰姆

FB0an嘉泰姆

(V)0an嘉泰姆

Note0an嘉泰姆

Package0an嘉泰姆

CXSD623550an嘉泰姆

30an嘉泰姆

280an嘉泰姆

0.7~1.80an嘉泰姆

300/4000an嘉泰姆

0.80an嘉泰姆

EN, SS, PGOOD,   OVP, UVP, OCP, VTTREF, Built-in BST diode, DDR1/2/3/3L, 2A LDO for VTT0an嘉泰姆

TQFN3X3-200an嘉泰姆

CXSD623560an嘉泰姆

4.50an嘉泰姆

280an嘉泰姆

0.7~2.60an嘉泰姆

ADJ0an嘉泰姆

0.70an嘉泰姆

EN,   PGOOD, OVP, UVP, OCP, VOUT Adjustable,1.5ms VOUT Servo Soft Start, 4700ppm/°C   RON Coefficient 0an嘉泰姆

TDFN3X3-100an嘉泰姆

CXSD623570an嘉泰姆

4.50an嘉泰姆

280an嘉泰姆

0.5~3.30an嘉泰姆

ADJ0an嘉泰姆

0.50an嘉泰姆

EN,   PGOOD, OVP, UVP, OCP, VOUT Adjustable, 1.5ms VOUT Servo Soft Start,   4700ppm/°C RON Coefficient0an嘉泰姆

TQFN2X2-120an嘉泰姆

CXSD623580an嘉泰姆

4.50an嘉泰姆

240an嘉泰姆

0.75~3.60an嘉泰姆

ADJ0an嘉泰姆

0.750an嘉泰姆

EN, SS, PGOOD,   OVP, UVP, OCP, Built-in BST diode0an嘉泰姆

TQFN3X3-160an嘉泰姆

CXSD623590an嘉泰姆

4.50an嘉泰姆

240an嘉泰姆

0.75~3.60an嘉泰姆

ADJ0an嘉泰姆

0.750an嘉泰姆

EN,   SS, PGOOD, OVP, UVP, OCP, Built-in BST diode0an嘉泰姆

TQFN3X3-160an嘉泰姆

CXSD623600an嘉泰姆

4.50an嘉泰姆

240an嘉泰姆

0.75~3.60an嘉泰姆

ADJ0an嘉泰姆

0.750an嘉泰姆

EN, SS, PGOOD,   OVP, UVP, OCP, Built-in BST diode0an嘉泰姆

TQFN3X3-16/TQFN3.5X3.5-140an嘉泰姆

CXSD62361/A0an嘉泰姆

20an嘉泰姆

240an嘉泰姆

0.75~3.60an嘉泰姆

400/ADJ0an嘉泰姆

0.750an嘉泰姆

EN,   SS, PGOOD, OVP, UVP, OCP, VTTREF, Built-in BST diode, DDR1/2/3/3L, 3A/2A   LDO for VTT0an嘉泰姆

TQFN4X4-24/TQFN3X3-200an嘉泰姆

CXSD623620an嘉泰姆

4.50an嘉泰姆

240an嘉泰姆

0.75~3.60an嘉泰姆

ADJ0an嘉泰姆

0.750an嘉泰姆

EN, PGOOD,   OVP, UVP, OCP, Built-in BST diode, SS, G0 & G1 Controls VOUT0an嘉泰姆

TQFN3X3-160an嘉泰姆

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