电压型异步PWM控制CXSD62375工作电压可达20V电压模式降压型脉宽调制转换器宽输入电源驱动高达3A的负载

CXSD62375是一种电压模式降压型脉宽调制转换器，能够在宽输入电源范围内驱动高达3A的负载。通过使用低RDS（ON）P通道电源开关可获得高效率。内部补偿使反馈控制在无需外部设计的情况下具有良好的线路和负载调节特性。它使用300千赫的固定开关频率。输出电压为3.3V，5V，用户可通过外部电阻分压器编程。内置的软启动可以在接通时减少输入源上的浪涌电流。

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 CXSD62375 is a voltage-mode buck PWM converter capable of driving up to 3A loads over a wide input supply range. High efficiency is obtained through the use of a low RDS(ON) P-channel power switch. The internal compensation makes feedback control have excellent line and load regulation characteristics without external designs. It uses a fixed switching frequency of 300KHz. The output voltage is 3.3V, 5V and an user-programmable version via an external resistive voltage divider. The built-in soft-start can reduce inrush current on the input source at turn on. The device also has built-in current-limit, thermal shutdown, under-voltage lockout and an ON/OFF logic-control that can power down the regulator to a shutdown mode. When current limit function occurred and VFB is down to 0.3V below, the device changes switching frequency to 120KHz to protect IC from damage. CXSD62375 is available in SOP-8 package.

   产品特点 返回TOP

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 „ Voltage Mode Asynchronous PWM Control 

„ 3.3V, 5V and Adjustable Output Version 

„ Operation Voltage can be up to 20V 

„ Adjustable Version Output Voltage Range, 0.8V to 16V±2% 

„ 300KHz Fixed Frequency Internal Oscillator 

„ Built-in Switching Transistor on Chip 

„ 3A Output Load Current „ Thermal Shutdown and Current Limit Protection 

 „ ON/OFF Shutdown Control 

„ Iq of Low Power Standby Mode 1μA 

„ Available in SOP-8 Packages

   应用范围 返回TOP

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„ Simple high-efficiency step-down regulator 

„ On-card switching regulators 

„ Positive to negative converter

   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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Asynchronous   Step Down Converter
Part   NO.	Vin(V) min.	Vin(V) max.	IOUT (A)	FSW (kHz)	FB(V)	Duty max(%)	IQ (μA)	Note	Package
CXSD62374	4.5	24	1.5	1400	0.92	65	1300	BS, IN, LX,GND, FB, COMP, EN, SS	SOP-8(FD)
CXSD62375	5.5	20	3	300	0.8	100	1000	FB, EN, NC, IN, NC, LX, GND, NC	SOP-8
CXSD62376	5	14	2	500	0.8	100	300	GND, IN, GND, FB, COMP, EN, LX, LX	SOP-8
CXSD62377	4.75	20	2	500	1.2	100	1000	IN, EN, COMP, FB, NC, GND, LX, NC	SOP-8
CXSD62378	4.75	20	3	500	1.2	100	1000	IN,   EN, COMP, FB, NC, GND, LX, NC	SOP-8(FD)
CXSD62379	4.75	20	2.5	500	0.8	100	1000	IN, EN, COMP,   FB, NC, GND, LX, NC	SOP-8
CXSD62380	4.75	20	2	380	1.22	100	1000	NC,   IN, LX, GND, FB, EN, SS	SOP-8
CXSD62381	4.75	20	2	380	0.92	100	1000	NC,   IN, LX, GND, FB, COMP, EN, SS,  NC*3IN, LX, GND, FB, COMP, EN, SS	SOP-8/MSOP-10(FD)
CXSD62382/3	4.75	20	3	380	1.22/0.92	100	1000	NC,   IN, LX, GND, FB, COMP, EN, SS	SOP-8(FD)
CXSD62384	3	5.5	2	ADJ	0.8	100	2000	COMP,   GND, EN, IN, LX*2, FQEQ, FB	SOP-8
CXSD62385	3	5.5	4	ADJ	0.8	100	2000	COMP,   GND, EN, IN, LX, LX, FQEQ, FB	SOP-8(FD)
CXSD62386/A	4.5	24	2	380	1.22/0.92	90	1500	BS,   IN, LX, GND, FB, COMP, EN, SS	SOP-8/MSOP-10(FD)
CXSD62387/A	4.5	24	3	380	1.22/0.92	90	1500	BS,   IN, LX, GND, FB, COMP, EN, SS	SOP-(FD)/DIP-8/MSOP-10(FD)
CXSD62388/A	4.75	24	2	380	1.22/0.92	90	1500	SS/NC,   BS, IN, LX, GND, FB, COMP, EN	SOP-8
CXSD62389	4.5	28	3	ADJ	0.8	90	170	LX,   EN, COMP, FB, GND, FREQ, IN, BS  Dutymax = 1 - (TOFFmin * 900K)	SOP-8(FD)/DIP-8/TDFN3X3-8
CXSD62390	7	18	4	400	0.8	90	700	EN, BS, IN,   LX, VCC, GND, FB, COMP	SOP-8(FD)
CXSD62391	6.5	24	2	385	1.22/0.92	90	1500	BS,   IN, LX, GND, FB, COMP, EN, SS	SOP-8
CXSD62392	4.5	28	3	380	1.22	90	1500	BS, IN, LX,   GND, FB, COMP, EN, SS	SOP-8(FD)