3A输出电流4.5V至18V输入电压CXSD62340固定1.4MHz开关频率100mΩ内部功率MOSFET开关逐周电流限制保护

CXSD62340是一个带有内部功率MOSFET的电流模式降压稳压器。该装置在4.5V至18V的宽输入电源范围内实现3A连续输出电流，负载和线路调节良好。CXSD62340的开关频率为1.4MHz，电流模式操作提供了快速的瞬态响应，有利于环路的稳定。

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXSD62340 is a current-mode step-down regulator with an internal power MOSFET. This device achieves 3A continuous output current over a wide input supply range from 4.5V to 18V with excellent load and line regulations. The switching frequency of CXSD62340 is 1.4MHz and current mode operation provides fast transient response and eases loop stabilization.

The CXSD62340 is highly efficient with peak efficiency at 91% when in operation. In shutdown mode the regulator draws less than 18μA of supply current. Protection features include cycle-by-cycle current limit and thermal shutdown. The device also includes an internal soft-start and an external adjustable soft-start function to limit the inrush current and prevent the overshoot of output voltage.

The CXSD62340 is available in Green SOIC-8 (Exposed Pad) package and requires a minimum number of readily available external components to complete a 3A step-down DC/DC converter solution.

   产品特点 返回TOP

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• 3A Output Current
• High Efficiency: Up to 91%
• 4.5V to 18V Input Voltage Range
• < 18μA Shutdown Supply Current
• 100mΩ Internal Power MOSFET Switch
• Fixed 1.4MHz Switching Frequency
• Output Adjustable from 0.8V to 14V
• Cycle-by-Cycle Current Limit Protection
• Thermal Shutdown Protection
• Under-Voltage Lockout
• Stable with Low ESR Ceramic Capacitors
• -40℃ to +85℃ Operating Temperature Range
• Available in Green SOIC-8 (Exposed Pad) Package

   应用范围 返回TOP

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Distributed Power Systems
Battery Chargers
Flat Panel TVs
Set-Top Boxes
Pre-Regulator for Linear Regulators
Cigarette Lighter Powered Devices
DVD/PVR Devices

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

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同步整流降压转换器
Product	CH	Enable	VCC (Min)V	VCC (Max)V	VOUT(V)	IOUT(mA)	Frequency (kHz)	Iq (mA)	SHDN  Iq(μA)	Package
CXSD62327	1	L	3	5.5	adj	3000	adj(300 to  2000)	0.41	2	TDFN-3x3-10L
CXSD62328	1	H	2.5	5.5	3.3/adj	2000	1400	0.3	2	TDFN-3x3-10L
CXSD62329	1	H	2.5	5.5	1.2/1.8/3.3/adj	800	1600	0.03	1	TSOT-23-5
CXSD62330	1	H	2.5	5.5	1.2/1.8/3.3/adj	800	1600	0.03	1	TSOT-23-5 TDFN-2x2-6L
CXSD62331	1	H	2.5	5.5	1.2/1.8/3.3/adj	2000	1400	0.055	2	TDFN-3x3-10L
CXSD62332	1	H	2.7	5.5	adj	1200	1600	0.03	1	TDFN-3x3-10L
CXSD62333	1	H	2.7	5.5	adj	1200	1600	0.03	1	TDFN-2x3-8L
CXSD62334	1	H	2.5	5.5	adj	600	6000	0.022	1	TDFN-2x2-6L
CXSD62335	1	H	2.5	5.5	0.6/0.8/1.0/1.1/1.15 /1.2/1.5/1.6/1.8/2.5/ 2.8/3.0/3.3	600	6000	0.022	1	TDFN-2x2-6L   WLCSP-1.21x0.81-6B
非同步降压转换器
Product	CH	Enable	VCC (Min)V	VCC MAX(V)	VOUT(V)	IOUT(mA)	Frequency (kHz)	Iq (mA)	SHDN  Iq(μA)	Package
CXSD62336	1	H	4.5	28.5	adj	3000	385	0.8	18	SOIC-8(EP)
CXSD62337	1	H	4.5	28.5	adj	3000	1400	0.8	18	SOIC-8(EP)
CXSD62338	1	H	4.5	38	adj	2000	385	0.8	18	SOIC-8(EP)
CXSD62339	1	H	4.5	38	adj	2000	1400	0.8	18	SOIC-8(EP)
CXSD62340	1	H	4.5	18	adj	3000	1400	0.8	18	SOIC-8(EP)