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

一,产品概述(General Description)     CXSD62136 CXSD62136B is a 2A synchronous buck converter with integrated power MOSFETs.The CXSD62136 CXSD62136B design with a current-mode control scheme, can convert wide input voltage of 4.5V to 24V to the output voltage adjustable from 0.92V to 20V to provide excellent output voltage regulation. The CXSD62136 CXSD62136B is also equipped with Power-on-reset, softstart, and whole protections (over-temperature, and current-limit) into a single package.This device, available SOP-8, provides a very compact system solution external components and PCB area  let嘉泰姆

二.产品特点(Features)let嘉泰姆

Wide Input Voltage from 4.5V to 24Vlet嘉泰姆
2A Continuous Output Currentlet嘉泰姆
Adjustable Output Voltage from 0.92V to 20Vlet嘉泰姆
Intergrated N-MOSFETlet嘉泰姆
Fixed 340kHz Switching Frequencylet嘉泰姆
Stable with Low ESR Capacitorslet嘉泰姆
Power-On-Reset Detectionlet嘉泰姆
Programmable Soft-Startlet嘉泰姆
Over-Temperature Protectionlet嘉泰姆
Over-Voltage Protectionlet嘉泰姆
Current-Limit Protection with Frequency Foldbacklet嘉泰姆
Enable/Shutdown Functionlet嘉泰姆
Small SOP-8 Packagelet嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)let嘉泰姆

三,应用范围 (Applications)let嘉泰姆

LCD Monitor/TVlet嘉泰姆
Set-Top Boxlet嘉泰姆

DSL, Switch HUBlet嘉泰姆
Notebook Computerlet嘉泰姆

四.下载产品资料PDF文档 let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！let嘉泰姆

 let嘉泰姆

五,产品封装图 (Package)let嘉泰姆

let嘉泰姆

六.电路原理图let嘉泰姆

let嘉泰姆

• 七,功能概述let嘉泰姆

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Main Control Loop The CXSD62136 CXSD62136B is a constant frequency current mode switching regulator. During normal operation, the inter-let嘉泰姆

nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and wouldlet嘉泰姆
be turned off when an internal current comparator (ICMP) resets the latch. The peak inductor current at which ICMPlet嘉泰姆
resets the RS latch is controlled by the voltage on the COMP pin, which is the output of the error amplifierlet嘉泰姆
(EAMP). An external resistive divider connected between VOUT and ground allows the EAMP to receive an outputlet嘉泰姆
feedback voltage VFB at FB pin. When the load current increases, it causes a slight decrease in VFB relative tolet嘉泰姆
the 0.92V reference, which in turn causes the COMP volt- age to increase until the average inductor current matcheslet嘉泰姆
the new load current. let嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltage Lockoutlet嘉泰姆
The CXSD62136 CXSD62136B keep monitoring the voltage on VIN pin to prevent wrong logic operations which may occur when VIN voltage is not high enough for the internal control circuitry to operate. The VIN POR has a rising thresholdlet嘉泰姆
of 4.1V (typical) with 0.5V of hysteresis.An external under-voltage lockout (UVLO) is sensed at the EN pin. Thelet嘉泰姆
EN UVLO has a rising threshold of 2.5V with 0.2V of hysteresis. The EN pin should be connectedlet嘉泰姆
a resistor divider from VIN to EN.After the VIN and EN voltages exceed their respective voltage thresholds,let嘉泰姆
the IC starts a start-up process and then ramps up the output voltage to the setting of output voltage.let嘉泰姆
Over-Temperature Protection (OTP)let嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62136 CXSD62136B. When the junction temperature ex-ceeds TJ = +160oC, a thermal sensor turns off the power MOSFET, allowing the devices to cool. The thermal sen-sor allows the converter to start a start-up process and regulate the output voltage again after the junction tem-let嘉泰姆
perature cools by 50oC.The OTP is designed with a 50oC hysteresis to lower the average TJ during continuous thermal overload conditions,increasing lifetime of the lC.let嘉泰姆
Enable / Shutdownlet嘉泰姆
Driving EN to ground places the CXSD62136 CXSD62136B in shutdown. When in shutdown, the internal power MOSFET turns off,all internal circuitry shuts down.let嘉泰姆
Current-Limit Protectionlet嘉泰姆
The CXSD62136 CXSD62136B monitors the output current, flowing through the N-Channel power MOSFET, and limits thelet嘉泰姆
IC from damages during overload, short-circuit and over- voltage conditions. let嘉泰姆
Frequency Foldbacklet嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltage is under 0.6V, the frequency oflet嘉泰姆
the oscillator will be reduced to 110kHz. This lower fre-quency allows the inductor current to safely discharge,let嘉泰姆
thereby preventing current runaway. The oscillator’s fre-quency will switch to its designed rate when the feedbacklet嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.let嘉泰姆
Over-Voltage Protectionlet嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increase over 120% of thelet嘉泰姆
reference voltage, the over-voltage protection compara-tor will force the low-side MOSFET gate driver high. Thislet嘉泰姆
action actively pulls down the output voltage. As soon as the output voltage is within regulation, the OVP compara-let嘉泰姆
tor is disengaged. The chip will restore its normal operation.let嘉泰姆

八,相关产品         更多同类产品.......let嘉泰姆

• Switching Regulator > Buck Converterlet嘉泰姆
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  					minlet嘉泰姆	maxlet嘉泰姆
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  CXSD62123let嘉泰姆	SOP-8let嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	2let嘉泰姆	4.5let嘉泰姆	26let嘉泰姆	380let嘉泰姆	0.8let嘉泰姆	100let嘉泰姆		1000let嘉泰姆
  CXSD62124let嘉泰姆	SOP-8Plet嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	4let嘉泰姆	4.5let嘉泰姆	26let嘉泰姆	380let嘉泰姆	0.8let嘉泰姆	80let嘉泰姆		1000let嘉泰姆
  CXSD62125let嘉泰姆	SOT23-5|TSOT23-5let嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	1let嘉泰姆	2.7let嘉泰姆	6let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆	25let嘉泰姆
  CXSD62125Alet嘉泰姆	SOT23-5let嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	1let嘉泰姆	2.7let嘉泰姆	6let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆
  CXSD62126let嘉泰姆	SOP-8let嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	3let嘉泰姆	4.3let嘉泰姆	14let嘉泰姆	500let嘉泰姆	0.8let嘉泰姆	70let嘉泰姆	70let嘉泰姆	500let嘉泰姆
  CXSD62127let嘉泰姆	SOP-8Plet嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	3let嘉泰姆	4.3let嘉泰姆	14let嘉泰姆	500let嘉泰姆	0.8let嘉泰姆	55let嘉泰姆	45let嘉泰姆	500let嘉泰姆
  CXSD62128Blet嘉泰姆	TDFN3x3-10let嘉泰姆			3let嘉泰姆	2.6let嘉泰姆	5.5let嘉泰姆	2000let嘉泰姆	0.8let嘉泰姆	110let嘉泰姆	110let嘉泰姆	460let嘉泰姆
  CXSD62129let嘉泰姆	TDFN3x3-10let嘉泰姆	CMlet嘉泰姆	2let嘉泰姆	1let嘉泰姆	2.7let嘉泰姆	6let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆	500let嘉泰姆
  CXSD62129Alet嘉泰姆	TDFN3x3-10let嘉泰姆	CMlet嘉泰姆	2let嘉泰姆	1let嘉泰姆	2.7let嘉泰姆	6let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆
  CXSD62130let嘉泰姆	TDFN2x2-6let嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	1let嘉泰姆	2.7let嘉泰姆	6let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆	25let嘉泰姆
  CXSD62130Alet嘉泰姆	TDFN2x2-6let嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	1let嘉泰姆	2.7let嘉泰姆	6let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆
  CXSD62131let嘉泰姆	TDFN3x3-12let嘉泰姆	CMlet嘉泰姆	2let嘉泰姆	1let嘉泰姆	2.7let嘉泰姆	6let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆	25let嘉泰姆
  CXSD62131Alet嘉泰姆	TDFN3x3-12let嘉泰姆	CMlet嘉泰姆	2let嘉泰姆	1let嘉泰姆	2.7let嘉泰姆	6let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆
  CXSD62131Clet嘉泰姆	TDFN 3x3 12let嘉泰姆	CMlet嘉泰姆	2let嘉泰姆	1let嘉泰姆	3let嘉泰姆	5.5let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆	30let嘉泰姆
  CXSD62132let嘉泰姆	TQFN3x3-20let嘉泰姆	CMlet嘉泰姆	3let嘉泰姆	2let嘉泰姆	2.9let嘉泰姆	5.5let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	-let嘉泰姆	-let嘉泰姆	300let嘉泰姆
  CXSD62133let嘉泰姆	TDFN2x2-8let嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	1let嘉泰姆	3.3let嘉泰姆	8let嘉泰姆	1500let嘉泰姆	0.6let嘉泰姆	280let嘉泰姆	250let嘉泰姆	25let嘉泰姆
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  CXSD62135let嘉泰姆	SOP-8Plet嘉泰姆	CMlet嘉泰姆	1let嘉泰姆	3let嘉泰姆	4.5let嘉泰姆	24let嘉泰姆	340let嘉泰姆	0.925let嘉泰姆	110let嘉泰姆	110let嘉泰姆

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