固定300kHz开关率频CXSD6273同步buck-PWM线性控制器0.8V参考输出电压以及监控和保护功能于一体。固定300kHz开关

发表时间：2020-04-21浏览次数：19

目录WMO嘉泰姆

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

一,产品概述(General Description) WMO嘉泰姆

The CXSD6273 integrates synchronous buck PWM, linear controller, and 0.8V ReferenceWMO嘉泰姆
Out Voltage, as well as the monitoring and protection functions into a single package. The WMO嘉泰姆
fixed 300kHz switching frequency synchro-nous PWM controller drives dual N-channelWMO嘉泰姆
MOSFETs,which provides one controlled power output with over-voltage and over-currentWMO嘉泰姆
protections. Linear controller drives an external N-channel MOSFET with under-volt-WMO嘉泰姆
age protection.WMO嘉泰姆
The CXSD6273 provides excellent regulation for output load variation. An internal 0.8VWMO嘉泰姆
temperature-compensated ref-erence voltage is designed to meet the requirement ofWMO嘉泰姆
low output voltage applications.WMO嘉泰姆
The CXSD6273 with excellent protection functions: POR,OCP, OVP and UVP. TheWMO嘉泰姆
Power-On-Reset (POR) circuit can monitor VCC12 supply voltage exceeds its thresholdWMO嘉泰姆
voltage while the controller is running, and a built-in digi-tal soft-start provides both outputsWMO嘉泰姆
with controlled rising voltage. The Over-Current Protection (OCP) monitors the output currentWMO嘉泰姆
by using the voltage drop across the lower MOSFET’s RDS(ON), comparing with the voltageWMO嘉泰姆
of OCSET pin, VOCSET. The maximum VOCSET voltage is limited to the internal default valueWMO嘉泰姆
0.25V. In addition, when OCSET pin is floating (no ROCSET resistor), the over current thresholdWMO嘉泰姆
will also be internal default value, 0.25V. When the output current reaches the trip point, theWMO嘉泰姆
controller will shutdown the IC directly, and latch the converter’s output. The Un-der-Voltage Protection (UVP) monitors the voltage of FBL pin for short-circuit protection. When the VFBL is less thanWMO嘉泰姆
50% of VREF, the controller will shutdown the IC directly.The Over-Voltage Protection (OVP)WMO嘉泰姆
monitors the voltage of FB. When the VFB is over 135% of VREF, the controller willWMO嘉泰姆
make Low-side gate signal fully turn on until the fault events are removed.WMO嘉泰姆
二.产品特点(Features)WMO嘉泰姆

1.)Two Regulated Voltages and REF_OUT Synchronous Buck ConverterWMO嘉泰姆
Linear RegulatorWMO嘉泰姆
REF_OUT = 0.8V±1% with 3mA Source CurrentWMO嘉泰姆
2.)Single 12V Power Supply RequiredWMO嘉泰姆
3.)Excellent Both Output Voltage RegulationWMO嘉泰姆
0.8V Internal ReferenceWMO嘉泰姆
±1% Over Line Voltage and TemperatureWMO嘉泰姆
4.)Integrated Soft-Start for PWM and Linear OutputsWMO嘉泰姆
5.)300KHz Fixed Switching FrequencyWMO嘉泰姆
6.)Voltage Mode PWM Control Design and Up to 89%(Typ.) Duty CycleWMO嘉泰姆
7.)Under-Voltage Protection Monitoring Linear Out-putWMO嘉泰姆
8.)Over-Voltage Protection Monitoring PWM OutputWMO嘉泰姆
9.)Over-Current Protection for PWM Output Sense Low-side MOSFET’s RDS(ON)WMO嘉泰姆

10.)SOP-14, SSOP-16 and Compact QFN4x4-16 pack-agesWMO嘉泰姆
11.)Lead Free and Green Devices Available(RoHS Compliant)WMO嘉泰姆
三,应用范围 (Applications)WMO嘉泰姆

Graphic CardsWMO嘉泰姆
四.下载产品资料PDF文档 WMO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！WMO嘉泰姆

QQ截图20160419174301.jpg WMO嘉泰姆

五,产品封装图 (Package)WMO嘉泰姆
WMO嘉泰姆
FUNCTION NAMEFUNCTIONWMO嘉泰姆

PIN NO.WMO嘉泰姆			NAMEWMO嘉泰姆	FUNCTIONWMO嘉泰姆


SOP-14WMO嘉泰姆	SSOP-16WMO嘉泰姆	QFN4x4-16WMO嘉泰姆
1WMO嘉泰姆	15WMO嘉泰姆		BOOTWMO嘉泰姆	This pin provides the bootstrap voltage to the upper gate driver for driving the N-channel MOSFET. An external capacitor from PHASE to BOOT, an internaldiode, and the power supply voltage VCC12, generates the bootstrap voltageWMO嘉泰姆 for the upper gate diver (UGATE).WMO嘉泰姆
2WMO嘉泰姆	2WMO嘉泰姆	16WMO嘉泰姆	FS_DISWMO嘉泰姆	This pin provides shutdown function. When pulling low the FS_DIS pin near GND will shutdown both regulators; almost any NFET or other pull-down device (< 1k. impedance) should work. Upon release of the FS_DIS pin, it willWMO嘉泰姆 enable both outputs back into regulation.WMO嘉泰姆
3WMO嘉泰姆	3WMO嘉泰姆	1WMO嘉泰姆	COMPWMO嘉泰姆	This pin is the output of PWM error amplifier. It is used to set the compensation components.WMO嘉泰姆
4WMO嘉泰姆	4WMO嘉泰姆	2WMO嘉泰姆	FBWMO嘉泰姆	This pin is the inverting input of the PWM error amplifier. It is used to set the output voltage and the compensation components. This pin is also monitoredWMO嘉泰姆 for under-voltage protection, when the FB voltage is under 50% of referenceWMO嘉泰姆 voltage (0.4V), both outputs will be shutdowned immediately.WMO嘉泰姆
5WMO嘉泰姆	5WMO嘉泰姆	3WMO嘉泰姆	DRIVEWMO嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.WMO嘉泰姆 It is also used to set the compensation for some specific applications, forWMO嘉泰姆 example, with low values of output capacitance and ESR.WMO嘉泰姆
6WMO嘉泰姆	6WMO嘉泰姆	4WMO嘉泰姆	FBLWMO嘉泰姆	This pin is the inverting input of the linear regulator error amplifier. It is used toWMO嘉泰姆 set the output voltage. This pin is also monitored for under-voltage protection,when the FBL voltage is under 50% of reference voltage(0.4V), both outputs will be shutdown immediately.WMO嘉泰姆
7WMO嘉泰姆	7,8WMO嘉泰姆	5,6WMO嘉泰姆	GNDWMO嘉泰姆	This pin is the signal ground pin. Connect the GND pin to a good ground plane.WMO嘉泰姆
8WMO嘉泰姆	9,10WMO嘉泰姆	7,8WMO嘉泰姆	VCC12WMO嘉泰姆	Power supply input pin. Connect a nominal 12V power supply to this pin. Thepower- on reset function monitors the input voltage at this pin. It is recommended that a decoupling capacitor (1 to 10μF) be connected to GND for noise decoupling.WMO嘉泰姆
9WMO嘉泰姆	11WMO嘉泰姆	9WMO嘉泰姆	REF_OUTWMO嘉泰姆	This pin provides a buffed voltage, which is from internal reference voltage. It is recommended that a 1mF capacitor is connected to ground for stability.WMO嘉泰姆 When VOCSET is above 1V, the REF_OUT buffer will be closed, the VREF_OUT is 0V.WMO嘉泰姆
10WMO嘉泰姆	12WMO嘉泰姆	10WMO嘉泰姆	OCSETWMO嘉泰姆	Connect a resistor (ROCSET) from this pin to GND, an internal 40mA current source will flow through this resistor and create a voltage drop. When VCC12 reaches the POR rising threshold voltage, the voltage drop of ROCSET will beWMO嘉泰姆 memoried and compared with the voltage across the lower MOSFET. The threshold of the over current limit is therefore given by: IOCSET × ROCSET ILIMIT = RDS(ON)(LOW − Side)WMO嘉泰姆 The CXSD6273 has a internal OCP voltage source, and the value is around 0.25V. When the ROCSET x IOCSET is bigger than 0.25V or the OCSET PIN is floating (no ROCSET resistor), the over current threshold will be the internal default value 0.25V.WMO嘉泰姆
11WMO嘉泰姆	13WMO嘉泰姆	11WMO嘉泰姆	LGATEWMO嘉泰姆	This pin is the gate driver for the lower MOSFET of PWM output.WMO嘉泰姆
12WMO嘉泰姆	14WMO嘉泰姆	12WMO嘉泰姆	PGNDWMO嘉泰姆	This pin is the power ground pin for the lower gate driver. It should be tied to GND pin on the board.WMO嘉泰姆
13WMO嘉泰姆	15WMO嘉泰姆	13WMO嘉泰姆	PHASEWMO嘉泰姆	This pin is the return path for the upper gate driver. Connect this pin to the upper MOSFET source, and connect a capacitor to BOOT for the bootstrap voltage. This pin is also used to monitor the voltage drop across the lowerWMO嘉泰姆 MOSFET for over-current protection.WMO嘉泰姆
14WMO嘉泰姆	16WMO嘉泰姆	14WMO嘉泰姆	UGATEWMO嘉泰姆	This pin is the gate driver for the upper MOSFET of PWM output.WMO嘉泰姆

六.电路原理图WMO嘉泰姆

WMO嘉泰姆

七,功能概述WMO嘉泰姆

Function Description (Cont.)WMO嘉泰姆

Over-Current Protection (Cont.)WMO嘉泰姆
When OCSET PIN is floating, the VOCSET will be pulled high and the over current threshold will be theWMO嘉泰姆

internal default value 0.25V. When the voltage drop across the lower MOSFET’s RDS(ON) is larger thanWMO嘉泰姆

0.25V, an over-cur-rent condition is detected, the controller will shutdown the IC directly, and latch WMO嘉泰姆

the converter’s output. WMO嘉泰姆
Over Voltage ProtectionWMO嘉泰姆
The FB pin is monitored during converter operation by its own Over Voltage(OV) comparator. If theWMO嘉泰姆

FB voltage is over 135% of the reference voltage, the controller will make Low-Side gate signal fully WMO嘉泰姆

turn on until the fault events are removed.WMO嘉泰姆
Under Voltage ProtectionWMO嘉泰姆
The FBL pin is monitored during converter operation by its own Under Voltage (UV) comparator. If WMO嘉泰姆

the FBL voltage drop below 50% of the reference voltage (50% of 0.8V =0.4V), a fault signal is WMO嘉泰姆

internally generated, and the de-vice turns off both high-side and low-side MOSFET and the WMO嘉泰姆

converter’s output is latched to be floating. The con-troller will shutdown the IC directly.WMO嘉泰姆
Shutdown and EnableWMO嘉泰姆
Pulling low the FS_DIS pin near GND by an open drain transistor or other pull-down device WMO嘉泰姆

(<1k. impedance)will shutdown both regulators. Upon release of the FS_DIS pin, it willWMO嘉泰姆

enable both outputs back into regulation. In shutdown mode, the UGATE and LGATEWMO嘉泰姆

turn off and pull to PHASE and GND respectively.WMO嘉泰姆

八,相关产品 更多同类产品...... WMO嘉泰姆

Switching Regulator > Buck ControllerWMO嘉泰姆
Part_No WMO嘉泰姆	Package WMO嘉泰姆	ArchiWMO嘉泰姆 tectuWMO嘉泰姆	PhaseWMO嘉泰姆	No.ofWMO嘉泰姆 PWMWMO嘉泰姆 OutputWMO嘉泰姆	Output WMO嘉泰姆 CurrentWMO嘉泰姆 (A) WMO嘉泰姆	InputWMO嘉泰姆 Voltage (V) WMO嘉泰姆		ReferenceWMO嘉泰姆 VoltageWMO嘉泰姆 (V) WMO嘉泰姆	Bias WMO嘉泰姆 VoltageWMO嘉泰姆 (V) WMO嘉泰姆	QuiescentWMO嘉泰姆 CurrentWMO嘉泰姆 (uA) WMO嘉泰姆
Part_No WMO嘉泰姆	Package WMO嘉泰姆	ArchiWMO嘉泰姆 tectuWMO嘉泰姆	PhaseWMO嘉泰姆	No.ofWMO嘉泰姆 PWMWMO嘉泰姆 OutputWMO嘉泰姆	Output WMO嘉泰姆 CurrentWMO嘉泰姆 (A) WMO嘉泰姆	minWMO嘉泰姆	maxWMO嘉泰姆	ReferenceWMO嘉泰姆 VoltageWMO嘉泰姆 (V) WMO嘉泰姆	Bias WMO嘉泰姆 VoltageWMO嘉泰姆 (V) WMO嘉泰姆	QuiescentWMO嘉泰姆 CurrentWMO嘉泰姆 (uA) WMO嘉泰姆
CXSD6273WMO嘉泰姆	SOP-14WMO嘉泰姆 QSOP-16WMO嘉泰姆 QFN4x4-16WMO嘉泰姆	VM WMO嘉泰姆	1 WMO嘉泰姆	1 WMO嘉泰姆	30WMO嘉泰姆	2.9 WMO嘉泰姆	13.2WMO嘉泰姆	0.9WMO嘉泰姆	12 WMO嘉泰姆	8000WMO嘉泰姆
CXSD6274WMO嘉泰姆	SOP-8WMO嘉泰姆	VM WMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	20WMO嘉泰姆	2.9 WMO嘉泰姆	13.2 WMO嘉泰姆	0.8WMO嘉泰姆	12WMO嘉泰姆	5000WMO嘉泰姆
CXSD6274CWMO嘉泰姆	SOP-8WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	20WMO嘉泰姆	2.9WMO嘉泰姆	13.2WMO嘉泰姆	0.8WMO嘉泰姆	12WMO嘉泰姆	5000WMO嘉泰姆
CXSD6275WMO嘉泰姆	QFN4x4-24WMO嘉泰姆	VMWMO嘉泰姆	2WMO嘉泰姆	1WMO嘉泰姆	60WMO嘉泰姆	3.1WMO嘉泰姆	13.2WMO嘉泰姆	0.6WMO嘉泰姆	12WMO嘉泰姆	5000WMO嘉泰姆
CXSD6276WMO嘉泰姆	SOP-8WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	20WMO嘉泰姆	2.2WMO嘉泰姆	13.2WMO嘉泰姆	0.8WMO嘉泰姆	5~12WMO嘉泰姆	2100WMO嘉泰姆
CXSD6276AWMO嘉泰姆	SOP-8WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	20WMO嘉泰姆	2.2WMO嘉泰姆	13.2WMO嘉泰姆	0.8WMO嘉泰姆	5~12WMO嘉泰姆	2100WMO嘉泰姆
CXSD6277/A/BWMO嘉泰姆	SOP8\|TSSOP8WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	5WMO嘉泰姆	5WMO嘉泰姆	13.2WMO嘉泰姆	1.25\|0.8WMO嘉泰姆	5~12WMO嘉泰姆	3000WMO嘉泰姆
CXSD6278WMO嘉泰姆	SOP-8WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	10WMO嘉泰姆	3.3WMO嘉泰姆	5.5WMO嘉泰姆	0.8WMO嘉泰姆	5WMO嘉泰姆	2100WMO嘉泰姆
CXSD6279BWMO嘉泰姆	SOP-14WMO嘉泰姆	VM WMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	10WMO嘉泰姆	5WMO嘉泰姆	13.2WMO嘉泰姆	0.8WMO嘉泰姆	12WMO嘉泰姆	2000WMO嘉泰姆
CXSD6280WMO嘉泰姆	TSSOP-24WMO嘉泰姆 \|QFN5x5-32WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	2WMO嘉泰姆	20WMO嘉泰姆	5WMO嘉泰姆	13.2WMO嘉泰姆	0.6WMO嘉泰姆	5~12WMO嘉泰姆	4000WMO嘉泰姆
CXSD6281NWMO嘉泰姆	SOP14WMO嘉泰姆 QSOP16WMO嘉泰姆 QFN-16WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	30WMO嘉泰姆	2.9WMO嘉泰姆	13.2WMO嘉泰姆	0.9WMO嘉泰姆	12WMO嘉泰姆	4000WMO嘉泰姆
CXSD6282WMO嘉泰姆	SOP-14WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	30WMO嘉泰姆	2.2WMO嘉泰姆	13.2WMO嘉泰姆	0.6WMO嘉泰姆	12WMO嘉泰姆	5000WMO嘉泰姆
CXSD6282AWMO嘉泰姆	SOP-14WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	30WMO嘉泰姆	2.2WMO嘉泰姆	13.2WMO嘉泰姆	0.6WMO嘉泰姆	12WMO嘉泰姆	5000WMO嘉泰姆
CXSD6283WMO嘉泰姆	SOP-14WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	25WMO嘉泰姆	2.2WMO嘉泰姆	13.2WMO嘉泰姆	0.8WMO嘉泰姆	12WMO嘉泰姆	5000WMO嘉泰姆
CXSD6284/AWMO嘉泰姆	LQFP7x7 48WMO嘉泰姆 TQFN7x7-48WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	6WMO嘉泰姆	0.015WMO嘉泰姆	1.4WMO嘉泰姆	6.5WMO嘉泰姆	-WMO嘉泰姆	5WMO嘉泰姆	1800WMO嘉泰姆
CXSD6285WMO嘉泰姆	TSSOP-24PWMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	2WMO嘉泰姆	20WMO嘉泰姆	2.97WMO嘉泰姆	5.5WMO嘉泰姆	0.8WMO嘉泰姆	5~12WMO嘉泰姆	5000WMO嘉泰姆
CXSD6286WMO嘉泰姆	SOP-14WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	10WMO嘉泰姆	5WMO嘉泰姆	13.2WMO嘉泰姆	0.8WMO嘉泰姆	12WMO嘉泰姆	3000WMO嘉泰姆
CXSD6287WMO嘉泰姆	SOP-8-P\|DIP-8WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	1WMO嘉泰姆	30WMO嘉泰姆	2.9WMO嘉泰姆	13.2WMO嘉泰姆	1.2WMO嘉泰姆	12WMO嘉泰姆	3000WMO嘉泰姆
CXSD6288WMO嘉泰姆	SSOP28WMO嘉泰姆 QFN4x4-24WMO嘉泰姆	VMWMO嘉泰姆	1WMO嘉泰姆	2WMO嘉泰姆	20WMO嘉泰姆	5WMO嘉泰姆	24WMO嘉泰姆	0.9WMO嘉泰姆	5</WMO嘉泰姆

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