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3A, 28V, 500kHz Synchronous Step-Down Converter CXSD62284A是一款500kHz固定频率同步电流模降压型DC-DC变换器。芯片集成了135mΩ主开关和90mΩ同步整流开关，在4.5V～28V的输入范围内能够提供高达3A的负载电流。内部集成了同步整流开关，不再需要外接肖特基二极管，提高了效率。电流模控制提供了快速的瞬态响应和周期性的峰值电流限制

CXSD62284A是一款500kHz固定频率同步电流模降压型DC-DC变换器。芯片集成了135mΩ主开关和90mΩ同步整流开关，在4.5V～28V的输入范围内能够提供高达3A的负载电流。内部集成了同步整流开关，不再需要外接肖特基二极管，提高了效率。电流模控制提供了快速的瞬态响应和周期性的峰值电流限制能力。在重负载时，CXSD62284A工作于固定频率脉冲宽度调制模式（PWM）以获得优异的稳定性和瞬态回应。在轻负载时，CXSD62284A会自动工作于脉冲跳跃模式以节省功耗。CXSD62284A具有短路和过温等保护机制，以确保芯片工作的安全性。可编程的软启动有效减小了输入浪涌电流和启动时的输出过冲。芯片在关断模式下的静态电流可低至1μA以下。CXSD62284A采用带有裸露底盘的SOP-8封装。The CXSD62284A is a 500KHz fixed frequency synchronous current mode buck regulator. The device integrates both 135mΩ high-side switch and 90mΩ low-side switch that provide 3A of continuous load current over a wide operating input voltage of 4.5V to 28V.The internal synchronous power switch increases efficiency and eliminates the need for an external Schottky diode. Current mode control provides fast transient response and cycle-by-cycle current limit. At heavy load, the CXSD62284A operates at a fixed frequency Pulse-Width Modulation mode for excellent stability and transient response. At light load, the CXSD62284A will operates at a Pulse-Skipping mode to save power. The CXSD62284A features short circuit and thermal protection circuits to increase system reliability. Externally programmable soft-start allows for proper power on sequencing with respect to other power supllies and avoids input inrush current during startup. In shutdown mode, the supply current drops below 1μA. The CXSD62284A is available in SOP-8 package with the exposed pad.

产品特点 返回TOP

• 轻负载自动脉冲跳跃模式

• 高达3A的输出电流

• 110ns最小TON时间

• 集成的135mΩ主开关

• 集成的90mΩ同步整流开关

• 输入电压范围：4.5V至28V

• 输出电压可调范围：0.8V至24V

• 效率高达95%

• 可编程的软启动

• 关断电流小于1μA

• 500kHz固定开关频率

• 过温保护和过流保护

• 输入欠压保护

• SOP-8(EP)封装

• 符合RoHS规范及Pb-Free Halogen-Free

􀁺 Automatic Pulse Skipping Mode at Light Load

􀁺 3A Continuous Output Current

􀁺 110ns Minimum On Time

􀁺 Integrated 135mΩ High Side Switch

􀁺 Integrated 90mΩ Low Side Switch

􀁺 Wide 4.5V to 28V Operating Input Range

􀁺 Output Adjustable from 0.8V to 24V

􀁺 Up to 95% Efficiency

􀁺 Programmable Soft-Start

􀁺 <1μA Shutdown Current

􀁺 500KHz Fixed Switching Frequency

􀁺 Thermal Shutdown and Over Current Protection

􀁺 Input Under Voltage Lockout

􀁺 Available in SOP-8 (EP) Package

􀁺 RoHS Compliant and 100% Lead(Pb)-Free

Halogen-Free

应用范围 返回TOP

• 分布式电源

• 网络系统

• FPGA、DSP及ASIC电源

􀁺 Distributed Power Systems

􀁺 Networking Systems

􀁺 FPGA, DSP, ASIC Power Supplies

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, 28V, 500kHz 同步降压型DC-DC变换器3A, 28V, 500kHz Synchronous Step-Down Converter CXSD62283是一款500kHz固定频率同步电流模降压型DC-DC变换器。芯片集成了135mΩ主开关和90mΩ同步整流开关，在4.5V～28V的输入范围内能够提供高达3A的负载电流。内部集成了同步整流开关，不再需要外接肖特基二极管，提高了效率下一条：3A, 28V, 1MHz 同步降压型DC-DC变换器3A, 28V, 1MHz Synchronous Step-Down Converter CXSD62285是一款1MHz固定频率同步电流模降压型DC-DC变换器。芯片集成了135mΩ主开关和90mΩ同步整流开关，在4.5V～28V的输入范围内能够提供高达3A的负载电流。内部集成了同步整流开关，不再需要外接肖特基二极管，提高了效率。电流模

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