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：55

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qJ8嘉泰姆
3.应用范围       4.下载产品资料PDF文档 qJ8嘉泰姆
5.产品封装图                     6.电路原理图             qJ8嘉泰姆
7.功能概述       8.相关产品qJ8嘉泰姆

一,产品概述(General Description) qJ8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.qJ8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.qJ8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.qJ8嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.qJ8嘉泰姆
二.产品特点(Features)qJ8嘉泰姆
Wide Input Voltage from 4.5V to 24VqJ8嘉泰姆
3A Continuous Output CurrentqJ8嘉泰姆
Adjustable Output Voltage from 0.925V to 20VqJ8嘉泰姆
Intergrated High/Low Side MOSFETqJ8嘉泰姆
PFM/PWM mode OperationqJ8嘉泰姆
Fixed 340kHz Switching FrequencyqJ8嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsqJ8嘉泰姆
Power-On-Reset DetectionqJ8嘉泰姆
Programmable Soft-StartqJ8嘉泰姆
Over-Temperature ProtectionqJ8嘉泰姆
Current-Limit Protection with Frequency FoldbackqJ8嘉泰姆
Enable/Shutdown FunctionqJ8嘉泰姆
Small SOP-8P PackageqJ8嘉泰姆
Lead Free and Green Devices AvailableqJ8嘉泰姆
(RoHS CompliantqJ8嘉泰姆
三,应用范围 (Applications)qJ8嘉泰姆

LCD Monitor/TVqJ8嘉泰姆

Set-Top BoxqJ8嘉泰姆
DSL, Switch HUBqJ8嘉泰姆
Notebook ComputerqJ8嘉泰姆

四.下载产品资料PDF文档 qJ8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！qJ8嘉泰姆

QQ截图20160419174301.jpg qJ8嘉泰姆

qJ8嘉泰姆

五,产品封装图 (Package)qJ8嘉泰姆

qJ8嘉泰姆

六.电路原理图qJ8嘉泰姆

qJ8嘉泰姆

七,功能概述qJ8嘉泰姆

Main Control LoopqJ8嘉泰姆
The CXSD62144 is a constant frequency current mode switching regulator. During normal operation, the inter-qJ8嘉泰姆
nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and wouldqJ8嘉泰姆
be turned off when an internal current comparator (ICMP) resets the latch. The peak inductor current at which ICMPqJ8嘉泰姆
resets the RS latch is controlled by the voltage on the COMP pin, which is the output of the error amplifierqJ8嘉泰姆
(EAMP). An external resistive divider connected between VOUT and ground allows the EAMP to receive an outputqJ8嘉泰姆
feedback voltage VFB at FB pin. When the load current increases, it causes a slight decrease in VFB relative toqJ8嘉泰姆
the 0.925V reference, which in turn causes the COMP voltage to increase until the average inductor currentqJ8嘉泰姆
matches the new load current.qJ8嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltage LockoutqJ8嘉泰姆
The CXSD62144 keep monitoring the voltage on VIN pin to prevent wrong logic operations which may occur whenqJ8嘉泰姆
VIN voltage is not high enough for the internal control circuitry to operate. The VIN POR has a rising thresholdqJ8嘉泰姆
of 4.05V (typical) with 0.3V of hysteresis.qJ8嘉泰姆
An external under-voltage lockout (UVLO) is sensed atthe EN pin. The EN UVLO has a rising threshold of 2.5VqJ8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 ENqJ8嘉泰姆
voltages exceed their respective voltage thresholds, the IC starts a start-up process and then ramps up the outputqJ8嘉泰姆
voltage to the setting of output voltage.qJ8嘉泰姆
Over-Temperature Protection (OTP)qJ8嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62144 When the junction temperature ex-qJ8嘉泰姆
ceeds TJ =+160oC, a thermal sensor turns off the power MOSFET, allowing the device to cool down. The thermalqJ8嘉泰姆
sensor allows the converter to start a start-up process and regulate the output voltage again after the junctionqJ8嘉泰姆
temperature cools by 50oC.qJ8嘉泰姆
The OTP designed with a 50 oC hysteresis lowers the average T J during c ontinuous thermal overload conditions,qJ8嘉泰姆
increasing life time of the IC.qJ8嘉泰姆
Enable/ShutdownqJ8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.qJ8嘉泰姆
Current-Limit ProtectionqJ8嘉泰姆
The CXSD62144 monitors the output current, flowing through the N-Channel power MOSFET, and limits theqJ8嘉泰姆
IC from damages during overload, short-circuit and over-voltage conditions.qJ8嘉泰姆
Frequency FoldbackqJ8嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltage is under 0.6V, the frequency ofqJ8嘉泰姆
the oscillator will be reduced to 110kHz. This lower fre-quency allows the inductor current to safely discharge,qJ8嘉泰姆
thereby preventing current runaway. The oscillator’s fre-quency will switch to its designed rate when the feedbackqJ8嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.qJ8嘉泰姆
Over-Voltage ProtectionqJ8嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increase over 120% of theqJ8嘉泰姆
reference voltage, the over-voltage protection compara-tor will force the high-and low-side MOSFET gate driverqJ8嘉泰姆
off. As soon as the output voltage is within regulation, the OVP comparator is disengaged. The chip will restore itsqJ8嘉泰姆
normal operation.qJ8嘉泰姆
八,相关产品 更多同类产品.......qJ8嘉泰姆

Switching Regulator > Buck ConverterqJ8嘉泰姆
Part_No qJ8嘉泰姆	PackageqJ8嘉泰姆	ArchitectuqJ8嘉泰姆	No.ofqJ8嘉泰姆 PWM qJ8嘉泰姆 OutpuqJ8嘉泰姆	DriveqJ8嘉泰姆 LoutqJ8嘉泰姆 (A) qJ8嘉泰姆	Vin(V) qJ8嘉泰姆		FmaxqJ8嘉泰姆 Khz qJ8嘉泰姆	Vref qJ8嘉泰姆 (V) qJ8嘉泰姆	R-Top (milohm) qJ8嘉泰姆	R-Sync (milohm) qJ8嘉泰姆	Iq (No load) (uA) qJ8嘉泰姆
Part_No qJ8嘉泰姆	PackageqJ8嘉泰姆	ArchitectuqJ8嘉泰姆	No.ofqJ8嘉泰姆 PWM qJ8嘉泰姆 OutpuqJ8嘉泰姆	DriveqJ8嘉泰姆 LoutqJ8嘉泰姆 (A) qJ8嘉泰姆	minqJ8嘉泰姆	maxqJ8嘉泰姆	FmaxqJ8嘉泰姆 Khz qJ8嘉泰姆	Vref qJ8嘉泰姆 (V) qJ8嘉泰姆	R-Top (milohm) qJ8嘉泰姆	R-Sync (milohm) qJ8嘉泰姆	Iq (No load) (uA) qJ8嘉泰姆
CXSD62122qJ8嘉泰姆	TQFN5x6-28qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	5qJ8嘉泰姆	4.5qJ8嘉泰姆	26qJ8嘉泰姆	380qJ8嘉泰姆	0.8qJ8嘉泰姆	50qJ8嘉泰姆	20qJ8嘉泰姆	1000qJ8嘉泰姆
CXSD62123qJ8嘉泰姆	SOP-8qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	2qJ8嘉泰姆	4.5qJ8嘉泰姆	26qJ8嘉泰姆	380qJ8嘉泰姆	0.8qJ8嘉泰姆	100qJ8嘉泰姆		1000qJ8嘉泰姆
CXSD62124qJ8嘉泰姆	SOP-8PqJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	4qJ8嘉泰姆	4.5qJ8嘉泰姆	26qJ8嘉泰姆	380qJ8嘉泰姆	0.8qJ8嘉泰姆	80qJ8嘉泰姆		1000qJ8嘉泰姆
CXSD62125qJ8嘉泰姆	SOT23-5\|TSOT23-5qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	1qJ8嘉泰姆	2.7qJ8嘉泰姆	6qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆	25qJ8嘉泰姆
CXSD62125AqJ8嘉泰姆	SOT23-5qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	1qJ8嘉泰姆	2.7qJ8嘉泰姆	6qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆
CXSD62126qJ8嘉泰姆	SOP-8qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	3qJ8嘉泰姆	4.3qJ8嘉泰姆	14qJ8嘉泰姆	500qJ8嘉泰姆	0.8qJ8嘉泰姆	70qJ8嘉泰姆	70qJ8嘉泰姆	500qJ8嘉泰姆
CXSD62127qJ8嘉泰姆	SOP-8PqJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	3qJ8嘉泰姆	4.3qJ8嘉泰姆	14qJ8嘉泰姆	500qJ8嘉泰姆	0.8qJ8嘉泰姆	55qJ8嘉泰姆	45qJ8嘉泰姆	500qJ8嘉泰姆
CXSD62128BqJ8嘉泰姆	TDFN3x3-10qJ8嘉泰姆			3qJ8嘉泰姆	2.6qJ8嘉泰姆	5.5qJ8嘉泰姆	2000qJ8嘉泰姆	0.8qJ8嘉泰姆	110qJ8嘉泰姆	110qJ8嘉泰姆	460qJ8嘉泰姆
CXSD62129qJ8嘉泰姆	TDFN3x3-10qJ8嘉泰姆	CMqJ8嘉泰姆	2qJ8嘉泰姆	1qJ8嘉泰姆	2.7qJ8嘉泰姆	6qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆	500qJ8嘉泰姆
CXSD62129AqJ8嘉泰姆	TDFN3x3-10qJ8嘉泰姆	CMqJ8嘉泰姆	2qJ8嘉泰姆	1qJ8嘉泰姆	2.7qJ8嘉泰姆	6qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆
CXSD62130qJ8嘉泰姆	TDFN2x2-6qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	1qJ8嘉泰姆	2.7qJ8嘉泰姆	6qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆	25qJ8嘉泰姆
CXSD62130AqJ8嘉泰姆	TDFN2x2-6qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	1qJ8嘉泰姆	2.7qJ8嘉泰姆	6qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆
CXSD62131qJ8嘉泰姆	TDFN3x3-12qJ8嘉泰姆	CMqJ8嘉泰姆	2qJ8嘉泰姆	1qJ8嘉泰姆	2.7qJ8嘉泰姆	6qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆	25qJ8嘉泰姆
CXSD62131AqJ8嘉泰姆	TDFN3x3-12qJ8嘉泰姆	CMqJ8嘉泰姆	2qJ8嘉泰姆	1qJ8嘉泰姆	2.7qJ8嘉泰姆	6qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆
CXSD62131CqJ8嘉泰姆	TDFN 3x3 12qJ8嘉泰姆	CMqJ8嘉泰姆	2qJ8嘉泰姆	1qJ8嘉泰姆	3qJ8嘉泰姆	5.5qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆	30qJ8嘉泰姆
CXSD62132qJ8嘉泰姆	TQFN3x3-20qJ8嘉泰姆	CMqJ8嘉泰姆	3qJ8嘉泰姆	2qJ8嘉泰姆	2.9qJ8嘉泰姆	5.5qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	-qJ8嘉泰姆	-qJ8嘉泰姆	300qJ8嘉泰姆
CXSD62133qJ8嘉泰姆	TDFN2x2-8qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	1qJ8嘉泰姆	3.3qJ8嘉泰姆	8qJ8嘉泰姆	1500qJ8嘉泰姆	0.6qJ8嘉泰姆	280qJ8嘉泰姆	250qJ8嘉泰姆	25qJ8嘉泰姆
CXSD62134qJ8嘉泰姆	SOP-8qJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	2qJ8嘉泰姆	4.5qJ8嘉泰姆	24qJ8嘉泰姆	340qJ8嘉泰姆	0.925qJ8嘉泰姆	110qJ8嘉泰姆	110qJ8嘉泰姆	1900qJ8嘉泰姆
CXSD62135qJ8嘉泰姆	SOP-8PqJ8嘉泰姆	CMqJ8嘉泰姆	1qJ8嘉泰姆	3qJ8嘉泰姆	4.5qJ8嘉泰姆	24qJ8嘉泰姆	340qJ8嘉泰姆	0.925qJ8嘉泰姆	110qJ8嘉泰姆	110qJ8嘉泰姆	1900qJ8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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