CXSD6253 380KHz fixed frequency PWM buck (step-down) DC/DC converter capable of driving a 2A load with high efficiency

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-13浏览次数：175

CXSD6253 380KHz fixed frequency PWM buck (step-down) DC/DC converter capable of driving a 2A load with high efficiency

目录rCm嘉泰姆

1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品PDF文档） rCm嘉泰姆
5.产品封装图 6.电路原理图 7.功能概述 8.相关产品rCm嘉泰姆

rCm嘉泰姆

一,产品概述(General Description) rCm嘉泰姆
rCm嘉泰姆
The CXSD6253 is a 380KHz fixed frequency PWM buck (step-down)rCm嘉泰姆
DC/DC converter,capable of driving a 2A load with high efficiency, low ripplerCm嘉泰姆
and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator.rCm嘉泰姆
The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function is built inside. When short protection function happens, the operation frequency will be reduced from 380KHz to 80KHz. An internal compensation block is built in to minimize external component count.rCm嘉泰姆
二.产品特点(Features)rCm嘉泰姆
rCm嘉泰姆
Wide 3.6V to 18V Input Voltage RangerCm嘉泰姆
Output Adjustable from 1.222V to 16VrCm嘉泰姆
Maximum Duty Cycle 100%rCm嘉泰姆
Minimum Drop Out 0.6VrCm嘉泰姆
Fixed 380KHz Switching FrequencyrCm嘉泰姆
2A Constant Output Current CapabilityrCm嘉泰姆
Internal Optimize Power MOSFETrCm嘉泰姆
High efficiencyrCm嘉泰姆
Excellent line and load regulationrCm嘉泰姆
TTL shutdown capabilityrCm嘉泰姆
EN pin with hysteresis functionrCm嘉泰姆
Built in thermal shutdown functionrCm嘉泰姆
Built in current limit functionrCm嘉泰姆
Built in output short protection functionrCm嘉泰姆
Available in SOP8L packagerCm嘉泰姆
三,应用范围 (Applications)rCm嘉泰姆
rCm嘉泰姆
LCD Monitor and LCD TVrCm嘉泰姆
Digital Photo FramerCm嘉泰姆
Set-up BoxrCm嘉泰姆
ADSL ModemrCm嘉泰姆
Telecom / Networking EquipmentrCm嘉泰姆
四.技术规格书下载（产品PDF）rCm嘉泰姆
rCm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！rCm嘉泰姆

QQ截图20160419174301.jpg rCm嘉泰姆

五,产品封装图 (Package)rCm嘉泰姆
rCm嘉泰姆
rCm嘉泰姆

Pin NumberrCm嘉泰姆	Pin NamerCm嘉泰姆	DescriptionrCm嘉泰姆
1,6,8rCm嘉泰姆	NCrCm嘉泰姆	No Connected.rCm嘉泰姆
2rCm嘉泰姆	VINrCm嘉泰姆	Supply Voltage Input Pin. CXSD6253 operates from a 3.6V to 18VrCm嘉泰姆 DC voltage. Bypass Vin to GND with a suitably large capacitorrCm嘉泰姆 to eliminate noise on the input.rCm嘉泰姆
3rCm嘉泰姆	SWrCm嘉泰姆	Power Switch Output Pin (SW). Output is the switch node thatrCm嘉泰姆 supplies power to the output.rCm嘉泰姆
4rCm嘉泰姆	GNDrCm嘉泰姆	Ground Pin. Care must be taken in layout. This pin should berCm嘉泰姆 placed outside of the Schottky Diode to output capacitor groundrCm嘉泰姆 path to prevent switching current spikes from inducing voltagerCm嘉泰姆 noise into CXSD6253.rCm嘉泰姆
5rCm嘉泰姆	FBrCm嘉泰姆	Feedback Pin (FB). Through an external resistor dividerrCm嘉泰姆 network, Feedback senses the output voltage and regulates it.rCm嘉泰姆 The feedback threshold voltage is 1.222V.rCm嘉泰姆
7rCm嘉泰姆	ENrCm嘉泰姆	Enable Pin. Drive EN pin low to turn off the device, drive itrCm嘉泰姆 high to turn it on. Floating is default high.rCm嘉泰姆

六.电路原理图rCm嘉泰姆
rCm嘉泰姆
rCm嘉泰姆

七,功能概述rCm嘉泰姆
rCm嘉泰姆

ParameterrCm嘉泰姆	SymbolrCm嘉泰姆	ValuerCm嘉泰姆	UnitrCm嘉泰姆
Input VoltagerCm嘉泰姆	VinrCm嘉泰姆	-0.3 to 20rCm嘉泰姆	VrCm嘉泰姆
Feedback Pin VoltagerCm嘉泰姆	VFBrCm嘉泰姆	-0.3 to VinrCm嘉泰姆	VrCm嘉泰姆
EN Pin VoltagerCm嘉泰姆	VENrCm嘉泰姆	-0.3 to VinrCm嘉泰姆	VrCm嘉泰姆
Output Switch Pin VoltagerCm嘉泰姆	VOutputrCm嘉泰姆	-0.3 to VinrCm嘉泰姆	VrCm嘉泰姆
Power DissipationrCm嘉泰姆	PDrCm嘉泰姆	Internally limitedrCm嘉泰姆	mWrCm嘉泰姆
Thermal Resistance (SOP8)rCm嘉泰姆 (Junction to Ambient, No Heatsink, Free Air)rCm嘉泰姆	RJArCm嘉泰姆	100rCm嘉泰姆	oC/WrCm嘉泰姆
Operating Junction TemperaturerCm嘉泰姆	TJrCm嘉泰姆	-40 to 125rCm嘉泰姆	oCrCm嘉泰姆
Storage TemperaturerCm嘉泰姆	TSTGrCm嘉泰姆	-65 to 150rCm嘉泰姆	oCrCm嘉泰姆
Lead Temperature (Soldering, 10 sec)rCm嘉泰姆	TLEADrCm嘉泰姆	260rCm嘉泰姆	oCrCm嘉泰姆
ESD (HBM)rCm嘉泰姆		2000rCm嘉泰姆	VrCm嘉泰姆

rCm嘉泰姆

八.DEMO BOARD MANUALrCm嘉泰姆
(一)CXSD6253 典型应用测试： rCm嘉泰姆

参数rCm嘉泰姆	符号rCm嘉泰姆	值rCm嘉泰姆	单位rCm嘉泰姆
输入电压rCm嘉泰姆	VINrCm嘉泰姆	3.6 to 18rCm嘉泰姆	VrCm嘉泰姆
输出电压rCm嘉泰姆	VOUTrCm嘉泰姆	5rCm嘉泰姆	VrCm嘉泰姆
输出电流rCm嘉泰姆	IOUTrCm嘉泰姆	0 to 2rCm嘉泰姆	ArCm嘉泰姆

1． CXSD6253 12V 转 5V（负载 0.2A—2A）应用电路图：rCm嘉泰姆
rCm嘉泰姆

2. CXSD6253 12V 转 5V（负载 0.2A—2A）效率图和输出电压变化曲线：rCm嘉泰姆
rCm嘉泰姆
(二)CXSD6253 PCB 板布局建议：rCm嘉泰姆
（1）流大电流的线要粗，短，不拐弯。rCm嘉泰姆
（2）4 脚（GND），2 脚（VIN）线要粗，短线，不拐弯，且输入电解电容 CIN 和 105 C1 陶rCm嘉泰姆
瓷电容紧挨第 2 脚（VIN）和 4 脚(GND)。（主要是为了减小输入电源布线寄生的电感，电阻rCm嘉泰姆
产生的高压开关毛刺干扰）rCm嘉泰姆
（3）3 脚（SW）输出线要粗，短线，不拐弯，电感和续流二极管要紧挨第 3 脚（SW）输出端。rCm嘉泰姆
（4）5 脚（FB）走线要接到输出滤波电容 C2,COUT 之后, PCB 布线远离 L1,D1,避免噪声干扰。rCm嘉泰姆

CXSD6253PCB 图：rCm嘉泰姆
(三)CXSD6253 温度测试数据：rCm嘉泰姆
1：CXSD6253 电路图和 PCB 版图。rCm嘉泰姆
rCm嘉泰姆

rCm嘉泰姆

2：CXSD6253 DEMO 板工作时（12V 转 5V）各元件温度，自然通风，室温：16℃。rCm嘉泰姆

输出负载电流rCm嘉泰姆	0.2ArCm嘉泰姆	0.5ArCm嘉泰姆	1ArCm嘉泰姆	1.5ArCm嘉泰姆	2ArCm嘉泰姆
27℃rCm嘉泰姆	28℃rCm嘉泰姆	31℃rCm嘉泰姆	33℃rCm嘉泰姆	42℃rCm嘉泰姆
电感（33uH/2A）rCm嘉泰姆	24℃rCm嘉泰姆	25℃rCm嘉泰姆	28℃rCm嘉泰姆	29℃rCm嘉泰姆	35℃rCm嘉泰姆
肖特基二极管（IN5822）rCm嘉泰姆	22℃rCm嘉泰姆	25℃rCm嘉泰姆	26℃rCm嘉泰姆	30℃rCm嘉泰姆	35℃rCm嘉泰姆
输入电容（35V/220uF）rCm嘉泰姆	22℃rCm嘉泰姆	23℃rCm嘉泰姆	25℃rCm嘉泰姆	26℃rCm嘉泰姆	31℃rCm嘉泰姆
输出电容（35V/220uF）rCm嘉泰姆	22℃rCm嘉泰姆	23℃rCm嘉泰姆	24℃rCm嘉泰姆	26℃rCm嘉泰姆	29℃rCm嘉泰姆

八,相关芯片选择指南rCm嘉泰姆
rCm嘉泰姆

降压型直流电源变换器芯片(高效率型)rCm嘉泰姆
产品型号rCm嘉泰姆	输入电压rCm嘉泰姆	开关电流rCm嘉泰姆	开关频率rCm嘉泰姆	电压版本rCm嘉泰姆	封装类型rCm嘉泰姆
CXSD6253rCm嘉泰姆	3.6V ~ 18VrCm嘉泰姆	2ArCm嘉泰姆	380KHzrCm嘉泰姆	Adj (1.222V)rCm嘉泰姆	SOP8LrCm嘉泰姆
CXSD6254rCm嘉泰姆	3.6V ~ 23VrCm嘉泰姆	3ArCm嘉泰姆	380KHzrCm嘉泰姆	Adj (1.222V)rCm嘉泰姆	SOP8LrCm嘉泰姆
CXSD6255rCm嘉泰姆	3.6V ~ 18VrCm嘉泰姆	2ArCm嘉泰姆	380KHzrCm嘉泰姆	Adj (0.8V)rCm嘉泰姆	SOP8LrCm嘉泰姆
CXSD6256rCm嘉泰姆	3.6V ~ 18VrCm嘉泰姆	3ArCm嘉泰姆	380KHzrCm嘉泰姆	Adj (0.8V)rCm嘉泰姆	SOP8LrCm嘉泰姆

使用手机扫描二维码访问 rCm嘉泰姆

上一篇：CXSD6251 synchronous buck regulator with integrated two 0.13Ω power MOSFETs 2A continuous output current over a wide input supply range

下一篇：CXSD6254 Wide 3.6V to 23V Input Voltage Range PWM buck (step-down) DC/DC converter 3A load Maximum Duty Cycle 100%

发表评论

产品中心

电源管理

LED驱动电路

音频放大IC

电机风扇驱动芯片

MCU存储ADC时钟数据线

功率器件

隔离芯片

电池充电芯片

技术支持

产品方案

质量承诺

联系我们