110m功率mosfet 3A同步降压转换器CXSD62144电流模式控制4.5V至24V的宽输入电压转换为0.925V至20V的可调输出电压

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发表时间：2020-04-28浏览次数：305

110m功率mosfet 3A同步降压转换器CXSD62144电流模式控制4.5V至24V的宽输入电压转换为0.925V至20V的可调输出电压

1.产品概述         2.产品特点c3v嘉泰姆
3.应用范围       4.下载产品资料PDF文档 c3v嘉泰姆
5.产品封装图                     6.电路原理图             c3v嘉泰姆
7.功能概述       8.相关产品c3v嘉泰姆

一,产品概述(General Description) c3v嘉泰姆
CXSD62144 CXSD62145 CXSD62146 CXSD62147 is a 3A synchronous buck converter with integrated 110mΩ power MOSFETs. The CXSD62144 design with a current-mode control scheme, can convert wide input voltage of 4.5V to 24V to the output voltage adjustable from 0.925V to 20V to provide excellent output voltage regulation.c3v嘉泰姆
The CXSD62144 CXSD62145 CXSD62146 CXSD62147 is equipped with an automatic PFM/PWM mode operation. At light load, the IC operates in the PFM mode to reduce the switching losses. At heavy load, the IC works in PWM.c3v嘉泰姆
The CXSD62144 CXSD62145 CXSD62146 CXSD62147 is also equipped with Power-on-reset, softstart, and whole protections (over-temperature, and current-limit) into a single package.c3v嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.c3v嘉泰姆
二.产品特点(Features)c3v嘉泰姆
Wide Input Voltage from 4.5V to 24Vc3v嘉泰姆
3A Continuous Output Currentc3v嘉泰姆
Adjustable Output Voltage from 0.925V to 20Vc3v嘉泰姆
Intergrated High/Low Side MOSFETc3v嘉泰姆
PFM/PWM mode Operationc3v嘉泰姆
Fixed 340kHz Switching Frequencyc3v嘉泰姆
Stable with Low ESR Ceramic Output Capacitorsc3v嘉泰姆
Power-On-Reset Detectionc3v嘉泰姆
Programmable Soft-Startc3v嘉泰姆
Over-Temperature Protectionc3v嘉泰姆
Current-Limit Protection with Frequency Foldbackc3v嘉泰姆
Enable/Shutdown Functionc3v嘉泰姆
Small SOP-8P Packagec3v嘉泰姆
Lead Free and Green Devices Availablec3v嘉泰姆
(RoHS Compliantc3v嘉泰姆
三,应用范围 (Applications)c3v嘉泰姆

LCD Monitor/TVc3v嘉泰姆

Set-Top Boxc3v嘉泰姆
DSL, Switch HUBc3v嘉泰姆
Notebook Computerc3v嘉泰姆

四.下载产品资料PDF文档 c3v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！c3v嘉泰姆

QQ截图20160419174301.jpg c3v嘉泰姆

c3v嘉泰姆

五,产品封装图 (Package)c3v嘉泰姆

c3v嘉泰姆

六.电路原理图c3v嘉泰姆

c3v嘉泰姆

七,功能概述c3v嘉泰姆

Main Control Loopc3v嘉泰姆
The CXSD62144 is a constant frequency current mode switching regulator. During normal operation, the inter-c3v嘉泰姆
nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and wouldc3v嘉泰姆
be turned off when an internal current comparator (ICMP) resets the latch. The peak inductor current at which ICMPc3v嘉泰姆
resets the RS latch is controlled by the voltage on the COMP pin, which is the output of the error amplifierc3v嘉泰姆
(EAMP). An external resistive divider connected between VOUT and ground allows the EAMP to receive an outputc3v嘉泰姆
feedback voltage VFB at FB pin. When the load current increases, it causes a slight decrease in VFB relative toc3v嘉泰姆
the 0.925V reference, which in turn causes the COMP voltage to increase until the average inductor currentc3v嘉泰姆
matches the new load current.c3v嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltage Lockoutc3v嘉泰姆
The CXSD62144 keep monitoring the voltage on VIN pin to prevent wrong logic operations which may occur whenc3v嘉泰姆
VIN voltage is not high enough for the internal control circuitry to operate. The VIN POR has a rising thresholdc3v嘉泰姆
of 4.05V (typical) with 0.3V of hysteresis.c3v嘉泰姆
An external under-voltage lockout (UVLO) is sensed atthe EN pin. The EN UVLO has a rising threshold of 2.5Vc3v嘉泰姆
with 0.2V of hysteresis. The EN pin should be connected a resistor divider from VIN to EN .After the VIN and ENc3v嘉泰姆
voltages exceed their respective voltage thresholds, the IC starts a start-up process and then ramps up the outputc3v嘉泰姆
voltage to the setting of output voltage.c3v嘉泰姆
Over-Temperature Protection (OTP)c3v嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62144 When the junction temperature ex-c3v嘉泰姆
ceeds TJ =+160oC, a thermal sensor turns off the power MOSFET, allowing the device to cool down. The thermalc3v嘉泰姆
sensor allows the converter to start a start-up process and regulate the output voltage again after the junctionc3v嘉泰姆
temperature cools by 50oC.c3v嘉泰姆
The OTP designed with a 50 oC hysteresis lowers the average T J during c ontinuous thermal overload conditions,c3v嘉泰姆
increasing life time of the IC.c3v嘉泰姆
Enable/Shutdownc3v嘉泰姆
Driving EN to ground places the CXSD62144 in shutdown.When in shutdown, the internal N-Channel power MOSFET turns off, all internal circuitry shuts down and the quies-cent supply current reduces to 0.3μA.c3v嘉泰姆
Current-Limit Protectionc3v嘉泰姆
The CXSD62144 monitors the output current, flowing through the N-Channel power MOSFET, and limits thec3v嘉泰姆
IC from damages during overload, short-circuit and over-voltage conditions.c3v嘉泰姆
Frequency Foldbackc3v嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltage is under 0.6V, the frequency ofc3v嘉泰姆
the oscillator will be reduced to 110kHz. This lower fre-quency allows the inductor current to safely discharge,c3v嘉泰姆
thereby preventing current runaway. The oscillator’s fre-quency will switch to its designed rate when the feedbackc3v嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.c3v嘉泰姆
Over-Voltage Protectionc3v嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increase over 120% of thec3v嘉泰姆
reference voltage, the over-voltage protection compara-tor will force the high-and low-side MOSFET gate driverc3v嘉泰姆
off. As soon as the output voltage is within regulation, the OVP comparator is disengaged. The chip will restore itsc3v嘉泰姆
normal operation.c3v嘉泰姆
八,相关产品 更多同类产品.......c3v嘉泰姆

Switching Regulator > Buck Converterc3v嘉泰姆
Part_No c3v嘉泰姆	Packagec3v嘉泰姆	Architectuc3v嘉泰姆	No.ofc3v嘉泰姆 PWM c3v嘉泰姆 Outpuc3v嘉泰姆	Drivec3v嘉泰姆 Loutc3v嘉泰姆 (A) c3v嘉泰姆	Vin(V) c3v嘉泰姆		Fmaxc3v嘉泰姆 Khz c3v嘉泰姆	Vref c3v嘉泰姆 (V) c3v嘉泰姆	R-Top (milohm) c3v嘉泰姆	R-Sync (milohm) c3v嘉泰姆	Iq (No load) (uA) c3v嘉泰姆
Part_No c3v嘉泰姆	Packagec3v嘉泰姆	Architectuc3v嘉泰姆	No.ofc3v嘉泰姆 PWM c3v嘉泰姆 Outpuc3v嘉泰姆	Drivec3v嘉泰姆 Loutc3v嘉泰姆 (A) c3v嘉泰姆	minc3v嘉泰姆	maxc3v嘉泰姆	Fmaxc3v嘉泰姆 Khz c3v嘉泰姆	Vref c3v嘉泰姆 (V) c3v嘉泰姆	R-Top (milohm) c3v嘉泰姆	R-Sync (milohm) c3v嘉泰姆	Iq (No load) (uA) c3v嘉泰姆
CXSD62122c3v嘉泰姆	TQFN5x6-28c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	5c3v嘉泰姆	4.5c3v嘉泰姆	26c3v嘉泰姆	380c3v嘉泰姆	0.8c3v嘉泰姆	50c3v嘉泰姆	20c3v嘉泰姆	1000c3v嘉泰姆
CXSD62123c3v嘉泰姆	SOP-8c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	2c3v嘉泰姆	4.5c3v嘉泰姆	26c3v嘉泰姆	380c3v嘉泰姆	0.8c3v嘉泰姆	100c3v嘉泰姆		1000c3v嘉泰姆
CXSD62124c3v嘉泰姆	SOP-8Pc3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	4c3v嘉泰姆	4.5c3v嘉泰姆	26c3v嘉泰姆	380c3v嘉泰姆	0.8c3v嘉泰姆	80c3v嘉泰姆		1000c3v嘉泰姆
CXSD62125c3v嘉泰姆	SOT23-5\|TSOT23-5c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	1c3v嘉泰姆	2.7c3v嘉泰姆	6c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆	25c3v嘉泰姆
CXSD62125Ac3v嘉泰姆	SOT23-5c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	1c3v嘉泰姆	2.7c3v嘉泰姆	6c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆
CXSD62126c3v嘉泰姆	SOP-8c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	3c3v嘉泰姆	4.3c3v嘉泰姆	14c3v嘉泰姆	500c3v嘉泰姆	0.8c3v嘉泰姆	70c3v嘉泰姆	70c3v嘉泰姆	500c3v嘉泰姆
CXSD62127c3v嘉泰姆	SOP-8Pc3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	3c3v嘉泰姆	4.3c3v嘉泰姆	14c3v嘉泰姆	500c3v嘉泰姆	0.8c3v嘉泰姆	55c3v嘉泰姆	45c3v嘉泰姆	500c3v嘉泰姆
CXSD62128Bc3v嘉泰姆	TDFN3x3-10c3v嘉泰姆			3c3v嘉泰姆	2.6c3v嘉泰姆	5.5c3v嘉泰姆	2000c3v嘉泰姆	0.8c3v嘉泰姆	110c3v嘉泰姆	110c3v嘉泰姆	460c3v嘉泰姆
CXSD62129c3v嘉泰姆	TDFN3x3-10c3v嘉泰姆	CMc3v嘉泰姆	2c3v嘉泰姆	1c3v嘉泰姆	2.7c3v嘉泰姆	6c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆	500c3v嘉泰姆
CXSD62129Ac3v嘉泰姆	TDFN3x3-10c3v嘉泰姆	CMc3v嘉泰姆	2c3v嘉泰姆	1c3v嘉泰姆	2.7c3v嘉泰姆	6c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆
CXSD62130c3v嘉泰姆	TDFN2x2-6c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	1c3v嘉泰姆	2.7c3v嘉泰姆	6c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆	25c3v嘉泰姆
CXSD62130Ac3v嘉泰姆	TDFN2x2-6c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	1c3v嘉泰姆	2.7c3v嘉泰姆	6c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆
CXSD62131c3v嘉泰姆	TDFN3x3-12c3v嘉泰姆	CMc3v嘉泰姆	2c3v嘉泰姆	1c3v嘉泰姆	2.7c3v嘉泰姆	6c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆	25c3v嘉泰姆
CXSD62131Ac3v嘉泰姆	TDFN3x3-12c3v嘉泰姆	CMc3v嘉泰姆	2c3v嘉泰姆	1c3v嘉泰姆	2.7c3v嘉泰姆	6c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆
CXSD62131Cc3v嘉泰姆	TDFN 3x3 12c3v嘉泰姆	CMc3v嘉泰姆	2c3v嘉泰姆	1c3v嘉泰姆	3c3v嘉泰姆	5.5c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆	30c3v嘉泰姆
CXSD62132c3v嘉泰姆	TQFN3x3-20c3v嘉泰姆	CMc3v嘉泰姆	3c3v嘉泰姆	2c3v嘉泰姆	2.9c3v嘉泰姆	5.5c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	-c3v嘉泰姆	-c3v嘉泰姆	300c3v嘉泰姆
CXSD62133c3v嘉泰姆	TDFN2x2-8c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	1c3v嘉泰姆	3.3c3v嘉泰姆	8c3v嘉泰姆	1500c3v嘉泰姆	0.6c3v嘉泰姆	280c3v嘉泰姆	250c3v嘉泰姆	25c3v嘉泰姆
CXSD62134c3v嘉泰姆	SOP-8c3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	2c3v嘉泰姆	4.5c3v嘉泰姆	24c3v嘉泰姆	340c3v嘉泰姆	0.925c3v嘉泰姆	110c3v嘉泰姆	110c3v嘉泰姆	1900c3v嘉泰姆
CXSD62135c3v嘉泰姆	SOP-8Pc3v嘉泰姆	CMc3v嘉泰姆	1c3v嘉泰姆	3c3v嘉泰姆	4.5c3v嘉泰姆	24c3v嘉泰姆	340c3v嘉泰姆	0.925c3v嘉泰姆	110c3v嘉泰姆	110c3v嘉泰姆	1900c3v嘉泰姆

上一篇：带Adj的高输入电压8A脉宽调制转换器CXSD62143软启动同步降压转换器30mW N沟道高侧MOSFET和9mW低侧MOSFET

下一篇：3A连续输出电流CXSD62145高/低边MOSFET PFM/PWM模式操作固定340kHz开关频率低ESR陶瓷输出电容稳定

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