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1A, 2.25MHz 同步降压DC/DC转换器1A, 2.25MHz Synchronous Step-Down DC/DC Regulator CXSD62268是一款应用于电池供电的便携式设备的同步降压DC/DC。2.5V到5.5V的输入电压范围使CXSD62268适合工作在一节锂电池或三节的镍氢电池/镍铬电池的便携式设备。该芯片也可工作于标准的3.3V或5V电压

CXSD62268是一款应用于电池供电的便携式设备的同步降压DC/DC。2.5V到5.5V的输入电压范围使CXSD62268适合工作在一节锂电池或三节的镍氢电池/镍铬电池的便携式设备。该芯片也可工作于标准的3.3V或5V电压。CXSD62268工作在2.25MHz的固定开关频率下，允许应用小的电感和电容以节省面积。内部同步开关管提升效率并无需外部肖特基二极管。CXSD62268内部集成了软启动功能，避免了电流启动过程中电流的过充。CXSD62268具有可供选择的force PWM和PFM/PWM模式。force PWM模式的纹波噪声小，而PFM模式具有轻载高效的优势。CXSD62268采用TDFN-6封装，并能提供高达1A的输出电流。The CXSD62268 is synchronous step-down DC-DC converters optimized for battery powered portable applications. The 2.7V to 5.5V input voltage range makes CXSD62268 ideal for powering portable equipment that runs from 1-cell Li-Ion or 3-cell NiMH/NiCD batteries. The device is also suitable to operate from a standard 3.3V or 5V voltage rail. The CXSD62268 operates at 2.25MHz fixed switching frequency allowing the use of small inductors and capacitors to achieve a small solution size. The internal synchronous switch increases efficiency and eliminates the need for an external schottky diode. The CXSD62268 has internal soft start and avoids inrush current during startup. The CXSD62268 has a user selectable mode of forced PWM and PFM/PWM mode. The forced PWM mode operation provides the lowest ripple noise and the PFM mode operation provides high efficiency at light loads. The CXSD62268is available in SOT23-5 and TDFN-6 package. For TDFN-6 package, it provides up to 1A output current.

产品特点 返回TOP

•高至95%的效率

•2.25MHz的固定频率

•1A负载电流能力

•典型30μA的静态电流

•2.7V到5.5V的输入电压范围

•低至0.6V的可调输出电压

•无需肖特基二极管

•短路保护和过温保护

•内部软启动功能

TDFN-6的封装

符合RoHS标准和100%无铅

High Efficiency Up to 95%

2.25MHz Constant Switching Frequency

1A Available Load Current

30μATypical Quiescent Current

2.7V to 5.5V Input Voltage Range

Adjustable Output Voltage as Low as 0.6V

No Schottky Diode Required

Short Circuit and Thermal Protection

Internal Soft Start Function

Available in TDFN-6 and SOT23-5 Packages

RoHS Compliant and 100% Lead(Pb)-Free

Halogen-Free

应用范围 返回TOP

•固态硬盘模块

•智能手机

•平板电脑

•便携式媒体播放器

•μC/μP, FPGA和数字信号处理器电源

•路由器和转化器的内置DC/DC模块

SSD Module

Smart Phones

Tablet PC

Portable Media Players

μC/μP, FPGA and DSP Power

Plug-in DC/DC Modules for Routers and

Switchers

技术规格书（产品PDF) 返回TOP

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QQ截图20160419174301.jpg

产品封装图 返回TOP

电路原理图 返回TOP

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DC/DC开关稳压器 > 降压转换器/控制器
Part Number	remark	Iout (mA)	Vin (V)	Vout (V)	IQ (μA)	FB (V)	Freq. (KHz)	Peak Efficency (%)	Package
CXSD62255	6A, 30V, Synchronous Step-Down Converter with Programmable Frequency	6000	2.7~30	0.8~20	1000	0.8	100~1000	>95	TQFN-23L
CXSD62256	2A, 30V, 340KHz Synchronous Step-Down Converter	2000	4.5~30	0.92~20	1000	0.92	340	>94	SOP-8
CXSD62257	3A, 30V, 340KHz Synchronous Step-Down Converter	3000	4.5~30	0.92~20	1000	0.92	340	>94	SOP-8(EP)
CXSD62258	CC/CV Mode Synchronous Step-Down Converter	4000	8~36	0.6~12	1000	0.6	80~800	>95	SOP-8(EP)
CXSD62259	Dual-Channel CC/CV Mode Synchronous Step-Down Controller	5000	8~36	0.6~12	1000	0.6	150	>95	MSOP-10
CXSD62260	CC/CV Mode Synchronous Step-Down Converter	4000	4.5~36	0.6~20	1000	0.6	80~800	>95	SOP-8(EP)
CXSD62261	CC/CV Mode Synchronous Step-Down Converter	4000	4.5~30	0.6~12	1000	0.6	80~800	>95	SOP-8(EP)
CXSD62262	Dual-Channel CC/CV Mode Synchronous Step-Down Converter	5000	8~36	0.6~12	1000	0.6	80~800	95	SOP-8(EP)
CXSD62263	5A, CC/CV Mode Step-Down Converter	5000	8~36	1.18~12	500	1.18	120	>95	SOP-8(EP)
CXSD62264	CC/CV Mode Step-Down Converter	3000	8~36	1.18~12	500	1.18	120	>95	SOP-8
CXSD62265	3A,40V,200KHz Step-Down Converter	3000	4.75~40	0.92~15	550	0.92	200	>95	SOP-8(EP)
CXSD62266	1.5MHz, 800mA Synchronous Step-Down Converter with Soft Start	800	2.5 ~ 5.5	0.6~Vin	270	0.6	1500	> 96	TSOT23-5,SOT23-5
CXSD62267	3A, Synchronous Step-Down Converter	3000	2.7~5.5	0.6~5	500	0.6	1000	>96	TDFN-10,SOP-8(EP)
CXSD62268	1A, 2.25MHz Synchronous Step-Down DC/DC Regulator	1000	2.7~5.5	0.6~3.3	30	0.6	2250	>94	TDFN-6
CXSD62269	1.5MHz,1A Synchronous Step-Down Converter with Soft Start	1000	2.5 ~ 5.5	0.6~5	270	0.6	1500	> 96	TDFN-6,SOT23-5,TSOT23-5
CXSD62270	5A, 3MHz Synchronous Step-Down DC-DC with I2C Compatible Interface	5000	2.7~5.5	0.6~1.4	52	-	3000	-	WCSP-20
CXSD62271	1A, 2.25MHz Synchronous Step-Down DC/DC Regulator	1000	2.7 ~ 5.5	0.6~Vin	30	0.6	2250	> 95	TDFN-6,TSOT23-5
CXSD62272	Dual High-Efficiency 1.5MHz 1A PWM Step-Down DC-DC Converter	1000 /1000	2.5 ~ 5.5	0.6~5	270	0.6	1500	> 96	TDFN-12
CXSD62273	Dual 1A, 2.25MHz Synchronous Step-Down DC/DC Regulator	1000/1000	2.7 ~ 5.5	0.6~Vin	45	0.6	2250	> 95	TDFN-10
CXSD62274	Dual 1A, 2.25MHz Synchronous Step-Down DC/DC Regulator	1000/1000	2.7 ~ 5.5	0.6~Vin	30	0.6	2250	> 95	TDFN-12
CXSD62275	1.2A,30V,1.2MHz Step-Down Converter	1200	4.5 ~ 30	0.8~15	550	0.8	1200	> 92	SOT23-6
CXSD62276	1.5A, 2.25MHz Synchronous Step-Down DC/DC Regulator	1500	2.7 ~ 5.5	0.6~Vin	30	0.6	2250	> 95	TDFN-6
CXSD62277	1.5A,40V,200KHz Step-Down Converter	1500	4.75 ~ 40	0.92~15	550	0.92	200	> 95	SOP-8
CXSD62278	2A, Synchronous Step-Down Converter	2000	2.7 ~ 5.5	0.8~5	500	0.8	1000	> 96	SOP-8
CXSD62279	2A, 30V, 340KHz SynchronousStep-Down Converter	2000	4.5 ~ 30	0.923~20	450	0.923	340	>93	SOP-8
CXSD62280	2A, 30V, 340KHz Synchronous Step-Down Converter	2000	4.5~30	0.923~20	450	0.923	340	>95	SOP-8
CXSD62281	2A, 30V, 340KHz Synchronous Step-Down Converter	2000	4.5~30	0.923~20	450	0.923	340	>95	SOP-8
CXSD62282	3A,30V,500KHz Step-Down Converter	3000	4. 5 ~ 30	0.8~12	450	0.8	500	> 95	SOP-8(EP)
CXSD62283	3A, 28V, 500kHz Synchronous Step-Down Converter	3000	4.5 ~ 28	0.8~24	1100	0.8	500	>95	SOP-8(EP)
CXSD62284	3A, 28V, 500kHz Synchronous Step-Down Converter	3000	4.5 ~ 28	0.8~24	1100	0.8	500	>95	SOP-8（EP）
CXSD62285	3A, 28V, 1MHz Synchronous Step-Down Converter	3000	4.5 ~ 28	0.8~24	1100	0.8	1000	>95	SOP-8(EP),TDFN-8(EP)
CXSD62286	3A,40V,200KHz Step-Down Converterr	3000	4.75 ~ 40	0.92~15	550	0.92	200	>95	SOP-8(EP)
CXSD62287	3A, 28V, 1MHz Synchronous Step-Down Converter	3000	4.5 ~ 28	0.8~24	1100	0.8	1000	>95	SOP-8（EP）
CXSD62288	3A, 30V, 340KHz Synchronous Step-Down Converter	3000	4.5 ~ 30	0.925~12	450	0.925	340	>95	SOP-8(EP)
CXSD62289	3A, 30V, 340KHz Synchronous Step-Down Converter	3000	4.5~30	0.923~20	450	0.925	340	>95	SOP-8(EP)
CXSD62290	3.2A, Synchronous Step-Down Converter	3200	2.7 ~ 5.5	0.8~5	500	0.8	1000	> 96	SOP-8(EP)
CXSD62291	4A, 21V, 500KHz Synchronous Step-Down Converter	4000	4.5 ~ 21	0.8~15	900	0.808	500	>95	SOP-8(EP)
CXSD62292	5A,30V,500KHz Step-Down Converter	5000	5.5 ~ 30	1.222~26	550	1.222	500	> 95	SOP-8(EP)
CXSD62293	6A Synchronous Step-Down Converter	6000	3.3~5.5	0.6~2	1000	0.6~2	1200	>93	TQFN-20
CXSD62294	4A, Synchronous Step-Down Converter	4000	2.7~5.5	0.6-~5	500	0.6	1000	96	TDFN-10
CXSD62295	2A, 24V, 340KHz Synchronous Step-Down Converter	2000	4.5~24	0.92~20	1000	0.92	340	94	SOP-8,TSOT23-8
CXSD62296	3A, 24V, 340KHz Synchronous Step-Down Converter	3000	4.5~24	0.92~20	1000	0.92	340	94	SOP-8

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上一条：3A, Synchronous Step-Down Converter 3A同步降压型DC-DC变换器CXSD62267 是一款采用1 MHz频率，电流模的降压型直流-直流变换器，提供高达3A的输出电流。该芯片的工作电压范围从2.7V到5.5V，输出电压从0.6V到5V，芯片内部集成了主开关管和同步管以提高效率，不需外接肖特基二极管。CXSD62267可以通过外部引脚设置为强制脉宽调制模式下一条：1.5MHz,1A 带软启功能的同步降压型变换器1.5MHz,1A Synchronous Step-Down Converter with Soft Start CXSD62269/B是一款采用固定频率，电流模，PWM架构的降压型变换器。该芯片集成了主开关管和同步管以提高效率。2.5V到5.5V的输入电压范围使得CXSD62269/B适用于采用单节锂离子电池或3节NiMH/NiCd电池的便携系

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