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

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发表时间：2020-04-21浏览次数：119

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

目录EKC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) EKC嘉泰姆

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

1.)Two Regulated Voltages and REF_OUT Synchronous Buck ConverterEKC嘉泰姆
Linear RegulatorEKC嘉泰姆
REF_OUT = 0.8V±1% with 3mA Source CurrentEKC嘉泰姆
2.)Single 12V Power Supply RequiredEKC嘉泰姆
3.)Excellent Both Output Voltage RegulationEKC嘉泰姆
0.8V Internal ReferenceEKC嘉泰姆
±1% Over Line Voltage and TemperatureEKC嘉泰姆
4.)Integrated Soft-Start for PWM and Linear OutputsEKC嘉泰姆
5.)300KHz Fixed Switching FrequencyEKC嘉泰姆
6.)Voltage Mode PWM Control Design and Up to 89%(Typ.) Duty CycleEKC嘉泰姆
7.)Under-Voltage Protection Monitoring Linear Out-putEKC嘉泰姆
8.)Over-Voltage Protection Monitoring PWM OutputEKC嘉泰姆
9.)Over-Current Protection for PWM Output Sense Low-side MOSFET’s RDS(ON)EKC嘉泰姆

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

Graphic CardsEKC嘉泰姆
四.下载产品资料PDF文档 EKC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！EKC嘉泰姆

QQ截图20160419174301.jpg EKC嘉泰姆

五,产品封装图 (Package)EKC嘉泰姆
EKC嘉泰姆
FUNCTION NAMEFUNCTIONEKC嘉泰姆

PIN NO.EKC嘉泰姆			NAMEEKC嘉泰姆	FUNCTIONEKC嘉泰姆


SOP-14EKC嘉泰姆	SSOP-16EKC嘉泰姆	QFN4x4-16EKC嘉泰姆
1EKC嘉泰姆	15EKC嘉泰姆		BOOTEKC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 voltageEKC嘉泰姆 for the upper gate diver (UGATE).EKC嘉泰姆
2EKC嘉泰姆	2EKC嘉泰姆	16EKC嘉泰姆	FS_DISEKC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 willEKC嘉泰姆 enable both outputs back into regulation.EKC嘉泰姆
3EKC嘉泰姆	3EKC嘉泰姆	1EKC嘉泰姆	COMPEKC嘉泰姆	This pin is the output of PWM error amplifier. It is used to set the compensation components.EKC嘉泰姆
4EKC嘉泰姆	4EKC嘉泰姆	2EKC嘉泰姆	FBEKC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 monitoredEKC嘉泰姆 for under-voltage protection, when the FB voltage is under 50% of referenceEKC嘉泰姆 voltage (0.4V), both outputs will be shutdowned immediately.EKC嘉泰姆
5EKC嘉泰姆	5EKC嘉泰姆	3EKC嘉泰姆	DRIVEEKC嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.EKC嘉泰姆 It is also used to set the compensation for some specific applications, forEKC嘉泰姆 example, with low values of output capacitance and ESR.EKC嘉泰姆
6EKC嘉泰姆	6EKC嘉泰姆	4EKC嘉泰姆	FBLEKC嘉泰姆	This pin is the inverting input of the linear regulator error amplifier. It is used toEKC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.EKC嘉泰姆
7EKC嘉泰姆	7,8EKC嘉泰姆	5,6EKC嘉泰姆	GNDEKC嘉泰姆	This pin is the signal ground pin. Connect the GND pin to a good ground plane.EKC嘉泰姆
8EKC嘉泰姆	9,10EKC嘉泰姆	7,8EKC嘉泰姆	VCC12EKC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.EKC嘉泰姆
9EKC嘉泰姆	11EKC嘉泰姆	9EKC嘉泰姆	REF_OUTEKC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.EKC嘉泰姆 When VOCSET is above 1V, the REF_OUT buffer will be closed, the VREF_OUT is 0V.EKC嘉泰姆
10EKC嘉泰姆	12EKC嘉泰姆	10EKC嘉泰姆	OCSETEKC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 beEKC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)EKC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.EKC嘉泰姆
11EKC嘉泰姆	13EKC嘉泰姆	11EKC嘉泰姆	LGATEEKC嘉泰姆	This pin is the gate driver for the lower MOSFET of PWM output.EKC嘉泰姆
12EKC嘉泰姆	14EKC嘉泰姆	12EKC嘉泰姆	PGNDEKC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.EKC嘉泰姆
13EKC嘉泰姆	15EKC嘉泰姆	13EKC嘉泰姆	PHASEEKC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 lowerEKC嘉泰姆 MOSFET for over-current protection.EKC嘉泰姆
14EKC嘉泰姆	16EKC嘉泰姆	14EKC嘉泰姆	UGATEEKC嘉泰姆	This pin is the gate driver for the upper MOSFET of PWM output.EKC嘉泰姆

六.电路原理图EKC嘉泰姆

EKC嘉泰姆

七,功能概述EKC嘉泰姆

Function Description (Cont.)EKC嘉泰姆

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

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

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

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

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

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

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

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

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

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

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

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

八,相关产品 更多同类产品...... EKC嘉泰姆

Switching Regulator > Buck ControllerEKC嘉泰姆
Part_No EKC嘉泰姆	Package EKC嘉泰姆	ArchiEKC嘉泰姆 tectuEKC嘉泰姆	PhaseEKC嘉泰姆	No.ofEKC嘉泰姆 PWMEKC嘉泰姆 OutputEKC嘉泰姆	Output EKC嘉泰姆 CurrentEKC嘉泰姆 (A) EKC嘉泰姆	InputEKC嘉泰姆 Voltage (V) EKC嘉泰姆		ReferenceEKC嘉泰姆 VoltageEKC嘉泰姆 (V) EKC嘉泰姆	Bias EKC嘉泰姆 VoltageEKC嘉泰姆 (V) EKC嘉泰姆	QuiescentEKC嘉泰姆 CurrentEKC嘉泰姆 (uA) EKC嘉泰姆
Part_No EKC嘉泰姆	Package EKC嘉泰姆	ArchiEKC嘉泰姆 tectuEKC嘉泰姆	PhaseEKC嘉泰姆	No.ofEKC嘉泰姆 PWMEKC嘉泰姆 OutputEKC嘉泰姆	Output EKC嘉泰姆 CurrentEKC嘉泰姆 (A) EKC嘉泰姆	minEKC嘉泰姆	maxEKC嘉泰姆	ReferenceEKC嘉泰姆 VoltageEKC嘉泰姆 (V) EKC嘉泰姆	Bias EKC嘉泰姆 VoltageEKC嘉泰姆 (V) EKC嘉泰姆	QuiescentEKC嘉泰姆 CurrentEKC嘉泰姆 (uA) EKC嘉泰姆
CXSD6273EKC嘉泰姆	SOP-14EKC嘉泰姆 QSOP-16EKC嘉泰姆 QFN4x4-16EKC嘉泰姆	VM EKC嘉泰姆	1 EKC嘉泰姆	1 EKC嘉泰姆	30EKC嘉泰姆	2.9 EKC嘉泰姆	13.2EKC嘉泰姆	0.9EKC嘉泰姆	12 EKC嘉泰姆	8000EKC嘉泰姆
CXSD6274EKC嘉泰姆	SOP-8EKC嘉泰姆	VM EKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	20EKC嘉泰姆	2.9 EKC嘉泰姆	13.2 EKC嘉泰姆	0.8EKC嘉泰姆	12EKC嘉泰姆	5000EKC嘉泰姆
CXSD6274CEKC嘉泰姆	SOP-8EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	20EKC嘉泰姆	2.9EKC嘉泰姆	13.2EKC嘉泰姆	0.8EKC嘉泰姆	12EKC嘉泰姆	5000EKC嘉泰姆
CXSD6275EKC嘉泰姆	QFN4x4-24EKC嘉泰姆	VMEKC嘉泰姆	2EKC嘉泰姆	1EKC嘉泰姆	60EKC嘉泰姆	3.1EKC嘉泰姆	13.2EKC嘉泰姆	0.6EKC嘉泰姆	12EKC嘉泰姆	5000EKC嘉泰姆
CXSD6276EKC嘉泰姆	SOP-8EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	20EKC嘉泰姆	2.2EKC嘉泰姆	13.2EKC嘉泰姆	0.8EKC嘉泰姆	5~12EKC嘉泰姆	2100EKC嘉泰姆
CXSD6276AEKC嘉泰姆	SOP-8EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	20EKC嘉泰姆	2.2EKC嘉泰姆	13.2EKC嘉泰姆	0.8EKC嘉泰姆	5~12EKC嘉泰姆	2100EKC嘉泰姆
CXSD6277/A/BEKC嘉泰姆	SOP8\|TSSOP8EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	5EKC嘉泰姆	5EKC嘉泰姆	13.2EKC嘉泰姆	1.25\|0.8EKC嘉泰姆	5~12EKC嘉泰姆	3000EKC嘉泰姆
CXSD6278EKC嘉泰姆	SOP-8EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	10EKC嘉泰姆	3.3EKC嘉泰姆	5.5EKC嘉泰姆	0.8EKC嘉泰姆	5EKC嘉泰姆	2100EKC嘉泰姆
CXSD6279BEKC嘉泰姆	SOP-14EKC嘉泰姆	VM EKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	10EKC嘉泰姆	5EKC嘉泰姆	13.2EKC嘉泰姆	0.8EKC嘉泰姆	12EKC嘉泰姆	2000EKC嘉泰姆
CXSD6280EKC嘉泰姆	TSSOP-24EKC嘉泰姆 \|QFN5x5-32EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	2EKC嘉泰姆	20EKC嘉泰姆	5EKC嘉泰姆	13.2EKC嘉泰姆	0.6EKC嘉泰姆	5~12EKC嘉泰姆	4000EKC嘉泰姆
CXSD6281NEKC嘉泰姆	SOP14EKC嘉泰姆 QSOP16EKC嘉泰姆 QFN-16EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	30EKC嘉泰姆	2.9EKC嘉泰姆	13.2EKC嘉泰姆	0.9EKC嘉泰姆	12EKC嘉泰姆	4000EKC嘉泰姆
CXSD6282EKC嘉泰姆	SOP-14EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	30EKC嘉泰姆	2.2EKC嘉泰姆	13.2EKC嘉泰姆	0.6EKC嘉泰姆	12EKC嘉泰姆	5000EKC嘉泰姆
CXSD6282AEKC嘉泰姆	SOP-14EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	30EKC嘉泰姆	2.2EKC嘉泰姆	13.2EKC嘉泰姆	0.6EKC嘉泰姆	12EKC嘉泰姆	5000EKC嘉泰姆
CXSD6283EKC嘉泰姆	SOP-14EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	25EKC嘉泰姆	2.2EKC嘉泰姆	13.2EKC嘉泰姆	0.8EKC嘉泰姆	12EKC嘉泰姆	5000EKC嘉泰姆
CXSD6284/AEKC嘉泰姆	LQFP7x7 48EKC嘉泰姆 TQFN7x7-48EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	6EKC嘉泰姆	0.015EKC嘉泰姆	1.4EKC嘉泰姆	6.5EKC嘉泰姆	-EKC嘉泰姆	5EKC嘉泰姆	1800EKC嘉泰姆
CXSD6285EKC嘉泰姆	TSSOP-24PEKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	2EKC嘉泰姆	20EKC嘉泰姆	2.97EKC嘉泰姆	5.5EKC嘉泰姆	0.8EKC嘉泰姆	5~12EKC嘉泰姆	5000EKC嘉泰姆
CXSD6286EKC嘉泰姆	SOP-14EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	10EKC嘉泰姆	5EKC嘉泰姆	13.2EKC嘉泰姆	0.8EKC嘉泰姆	12EKC嘉泰姆	3000EKC嘉泰姆
CXSD6287EKC嘉泰姆	SOP-8-P\|DIP-8EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	1EKC嘉泰姆	30EKC嘉泰姆	2.9EKC嘉泰姆	13.2EKC嘉泰姆	1.2EKC嘉泰姆	12EKC嘉泰姆	3000EKC嘉泰姆
CXSD6288EKC嘉泰姆	SSOP28EKC嘉泰姆 QFN4x4-24EKC嘉泰姆	VMEKC嘉泰姆	1EKC嘉泰姆	2EKC嘉泰姆	20EKC嘉泰姆	5EKC嘉泰姆	24EKC嘉泰姆	0.9EKC嘉泰姆	5</EKC嘉泰姆

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