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：357

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2Yo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) 2Yo嘉泰姆

The CXSD6273 integrates synchronous buck PWM, linear controller, and 0.8V Reference2Yo嘉泰姆
Out Voltage, as well as the monitoring and protection functions into a single package. The 2Yo嘉泰姆
fixed 300kHz switching frequency synchro-nous PWM controller drives dual N-channel2Yo嘉泰姆
MOSFETs,which provides one controlled power output with over-voltage and over-current2Yo嘉泰姆
protections. Linear controller drives an external N-channel MOSFET with under-volt-2Yo嘉泰姆
age protection.2Yo嘉泰姆
The CXSD6273 provides excellent regulation for output load variation. An internal 0.8V2Yo嘉泰姆
temperature-compensated ref-erence voltage is designed to meet the requirement of2Yo嘉泰姆
low output voltage applications.2Yo嘉泰姆
The CXSD6273 with excellent protection functions: POR,OCP, OVP and UVP. The2Yo嘉泰姆
Power-On-Reset (POR) circuit can monitor VCC12 supply voltage exceeds its threshold2Yo嘉泰姆
voltage while the controller is running, and a built-in digi-tal soft-start provides both outputs2Yo嘉泰姆
with controlled rising voltage. The Over-Current Protection (OCP) monitors the output current2Yo嘉泰姆
by using the voltage drop across the lower MOSFET’s RDS(ON), comparing with the voltage2Yo嘉泰姆
of OCSET pin, VOCSET. The maximum VOCSET voltage is limited to the internal default value2Yo嘉泰姆
0.25V. In addition, when OCSET pin is floating (no ROCSET resistor), the over current threshold2Yo嘉泰姆
will also be internal default value, 0.25V. When the output current reaches the trip point, the2Yo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 than2Yo嘉泰姆
50% of VREF, the controller will shutdown the IC directly.The Over-Voltage Protection (OVP)2Yo嘉泰姆
monitors the voltage of FB. When the VFB is over 135% of VREF, the controller will2Yo嘉泰姆
make Low-side gate signal fully turn on until the fault events are removed.2Yo嘉泰姆
二.产品特点(Features)2Yo嘉泰姆

1.)Two Regulated Voltages and REF_OUT Synchronous Buck Converter2Yo嘉泰姆
Linear Regulator2Yo嘉泰姆
REF_OUT = 0.8V±1% with 3mA Source Current2Yo嘉泰姆
2.)Single 12V Power Supply Required2Yo嘉泰姆
3.)Excellent Both Output Voltage Regulation2Yo嘉泰姆
0.8V Internal Reference2Yo嘉泰姆
±1% Over Line Voltage and Temperature2Yo嘉泰姆
4.)Integrated Soft-Start for PWM and Linear Outputs2Yo嘉泰姆
5.)300KHz Fixed Switching Frequency2Yo嘉泰姆
6.)Voltage Mode PWM Control Design and Up to 89%(Typ.) Duty Cycle2Yo嘉泰姆
7.)Under-Voltage Protection Monitoring Linear Out-put2Yo嘉泰姆
8.)Over-Voltage Protection Monitoring PWM Output2Yo嘉泰姆
9.)Over-Current Protection for PWM Output Sense Low-side MOSFET’s RDS(ON)2Yo嘉泰姆

10.)SOP-14, SSOP-16 and Compact QFN4x4-16 pack-ages2Yo嘉泰姆
11.)Lead Free and Green Devices Available(RoHS Compliant)2Yo嘉泰姆
三,应用范围 (Applications)2Yo嘉泰姆

Graphic Cards2Yo嘉泰姆
四.下载产品资料PDF文档 2Yo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！2Yo嘉泰姆

QQ截图20160419174301.jpg 2Yo嘉泰姆

五,产品封装图 (Package)2Yo嘉泰姆
2Yo嘉泰姆
FUNCTION NAMEFUNCTION2Yo嘉泰姆

PIN NO.2Yo嘉泰姆			NAME2Yo嘉泰姆	FUNCTION2Yo嘉泰姆


SOP-142Yo嘉泰姆	SSOP-162Yo嘉泰姆	QFN4x4-162Yo嘉泰姆
12Yo嘉泰姆	152Yo嘉泰姆		BOOT2Yo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 voltage2Yo嘉泰姆 for the upper gate diver (UGATE).2Yo嘉泰姆
22Yo嘉泰姆	22Yo嘉泰姆	162Yo嘉泰姆	FS_DIS2Yo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 will2Yo嘉泰姆 enable both outputs back into regulation.2Yo嘉泰姆
32Yo嘉泰姆	32Yo嘉泰姆	12Yo嘉泰姆	COMP2Yo嘉泰姆	This pin is the output of PWM error amplifier. It is used to set the compensation components.2Yo嘉泰姆
42Yo嘉泰姆	42Yo嘉泰姆	22Yo嘉泰姆	FB2Yo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 monitored2Yo嘉泰姆 for under-voltage protection, when the FB voltage is under 50% of reference2Yo嘉泰姆 voltage (0.4V), both outputs will be shutdowned immediately.2Yo嘉泰姆
52Yo嘉泰姆	52Yo嘉泰姆	32Yo嘉泰姆	DRIVE2Yo嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.2Yo嘉泰姆 It is also used to set the compensation for some specific applications, for2Yo嘉泰姆 example, with low values of output capacitance and ESR.2Yo嘉泰姆
62Yo嘉泰姆	62Yo嘉泰姆	42Yo嘉泰姆	FBL2Yo嘉泰姆	This pin is the inverting input of the linear regulator error amplifier. It is used to2Yo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.2Yo嘉泰姆
72Yo嘉泰姆	7,82Yo嘉泰姆	5,62Yo嘉泰姆	GND2Yo嘉泰姆	This pin is the signal ground pin. Connect the GND pin to a good ground plane.2Yo嘉泰姆
82Yo嘉泰姆	9,102Yo嘉泰姆	7,82Yo嘉泰姆	VCC122Yo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.2Yo嘉泰姆
92Yo嘉泰姆	112Yo嘉泰姆	92Yo嘉泰姆	REF_OUT2Yo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.2Yo嘉泰姆 When VOCSET is above 1V, the REF_OUT buffer will be closed, the VREF_OUT is 0V.2Yo嘉泰姆
102Yo嘉泰姆	122Yo嘉泰姆	102Yo嘉泰姆	OCSET2Yo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 be2Yo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)2Yo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.2Yo嘉泰姆
112Yo嘉泰姆	132Yo嘉泰姆	112Yo嘉泰姆	LGATE2Yo嘉泰姆	This pin is the gate driver for the lower MOSFET of PWM output.2Yo嘉泰姆
122Yo嘉泰姆	142Yo嘉泰姆	122Yo嘉泰姆	PGND2Yo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.2Yo嘉泰姆
132Yo嘉泰姆	152Yo嘉泰姆	132Yo嘉泰姆	PHASE2Yo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 lower2Yo嘉泰姆 MOSFET for over-current protection.2Yo嘉泰姆
142Yo嘉泰姆	162Yo嘉泰姆	142Yo嘉泰姆	UGATE2Yo嘉泰姆	This pin is the gate driver for the upper MOSFET of PWM output.2Yo嘉泰姆

六.电路原理图2Yo嘉泰姆

2Yo嘉泰姆

七,功能概述2Yo嘉泰姆

Function Description (Cont.)2Yo嘉泰姆

Over-Current Protection (Cont.)2Yo嘉泰姆
When OCSET PIN is floating, the VOCSET will be pulled high and the over current threshold will be the2Yo嘉泰姆

internal default value 0.25V. When the voltage drop across the lower MOSFET’s RDS(ON) is larger than2Yo嘉泰姆

0.25V, an over-cur-rent condition is detected, the controller will shutdown the IC directly, and latch 2Yo嘉泰姆

the converter’s output. 2Yo嘉泰姆
Over Voltage Protection2Yo嘉泰姆
The FB pin is monitored during converter operation by its own Over Voltage(OV) comparator. If the2Yo嘉泰姆

FB voltage is over 135% of the reference voltage, the controller will make Low-Side gate signal fully 2Yo嘉泰姆

turn on until the fault events are removed.2Yo嘉泰姆
Under Voltage Protection2Yo嘉泰姆
The FBL pin is monitored during converter operation by its own Under Voltage (UV) comparator. If 2Yo嘉泰姆

the FBL voltage drop below 50% of the reference voltage (50% of 0.8V =0.4V), a fault signal is 2Yo嘉泰姆

internally generated, and the de-vice turns off both high-side and low-side MOSFET and the 2Yo嘉泰姆

converter’s output is latched to be floating. The con-troller will shutdown the IC directly.2Yo嘉泰姆
Shutdown and Enable2Yo嘉泰姆
Pulling low the FS_DIS pin near GND by an open drain transistor or other pull-down device 2Yo嘉泰姆

(<1k. impedance)will shutdown both regulators. Upon release of the FS_DIS pin, it will2Yo嘉泰姆

enable both outputs back into regulation. In shutdown mode, the UGATE and LGATE2Yo嘉泰姆

turn off and pull to PHASE and GND respectively.2Yo嘉泰姆

八,相关产品 更多同类产品...... 2Yo嘉泰姆

Switching Regulator > Buck Controller2Yo嘉泰姆
Part_No 2Yo嘉泰姆	Package 2Yo嘉泰姆	Archi2Yo嘉泰姆 tectu2Yo嘉泰姆	Phase2Yo嘉泰姆	No.of2Yo嘉泰姆 PWM2Yo嘉泰姆 Output2Yo嘉泰姆	Output 2Yo嘉泰姆 Current2Yo嘉泰姆 (A) 2Yo嘉泰姆	Input2Yo嘉泰姆 Voltage (V) 2Yo嘉泰姆		Reference2Yo嘉泰姆 Voltage2Yo嘉泰姆 (V) 2Yo嘉泰姆	Bias 2Yo嘉泰姆 Voltage2Yo嘉泰姆 (V) 2Yo嘉泰姆	Quiescent2Yo嘉泰姆 Current2Yo嘉泰姆 (uA) 2Yo嘉泰姆
Part_No 2Yo嘉泰姆	Package 2Yo嘉泰姆	Archi2Yo嘉泰姆 tectu2Yo嘉泰姆	Phase2Yo嘉泰姆	No.of2Yo嘉泰姆 PWM2Yo嘉泰姆 Output2Yo嘉泰姆	Output 2Yo嘉泰姆 Current2Yo嘉泰姆 (A) 2Yo嘉泰姆	min2Yo嘉泰姆	max2Yo嘉泰姆	Reference2Yo嘉泰姆 Voltage2Yo嘉泰姆 (V) 2Yo嘉泰姆	Bias 2Yo嘉泰姆 Voltage2Yo嘉泰姆 (V) 2Yo嘉泰姆	Quiescent2Yo嘉泰姆 Current2Yo嘉泰姆 (uA) 2Yo嘉泰姆
CXSD62732Yo嘉泰姆	SOP-142Yo嘉泰姆 QSOP-162Yo嘉泰姆 QFN4x4-162Yo嘉泰姆	VM 2Yo嘉泰姆	1 2Yo嘉泰姆	1 2Yo嘉泰姆	302Yo嘉泰姆	2.9 2Yo嘉泰姆	13.22Yo嘉泰姆	0.92Yo嘉泰姆	12 2Yo嘉泰姆	80002Yo嘉泰姆
CXSD62742Yo嘉泰姆	SOP-82Yo嘉泰姆	VM 2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	202Yo嘉泰姆	2.9 2Yo嘉泰姆	13.2 2Yo嘉泰姆	0.82Yo嘉泰姆	122Yo嘉泰姆	50002Yo嘉泰姆
CXSD6274C2Yo嘉泰姆	SOP-82Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	202Yo嘉泰姆	2.92Yo嘉泰姆	13.22Yo嘉泰姆	0.82Yo嘉泰姆	122Yo嘉泰姆	50002Yo嘉泰姆
CXSD62752Yo嘉泰姆	QFN4x4-242Yo嘉泰姆	VM2Yo嘉泰姆	22Yo嘉泰姆	12Yo嘉泰姆	602Yo嘉泰姆	3.12Yo嘉泰姆	13.22Yo嘉泰姆	0.62Yo嘉泰姆	122Yo嘉泰姆	50002Yo嘉泰姆
CXSD62762Yo嘉泰姆	SOP-82Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	202Yo嘉泰姆	2.22Yo嘉泰姆	13.22Yo嘉泰姆	0.82Yo嘉泰姆	5~122Yo嘉泰姆	21002Yo嘉泰姆
CXSD6276A2Yo嘉泰姆	SOP-82Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	202Yo嘉泰姆	2.22Yo嘉泰姆	13.22Yo嘉泰姆	0.82Yo嘉泰姆	5~122Yo嘉泰姆	21002Yo嘉泰姆
CXSD6277/A/B2Yo嘉泰姆	SOP8\|TSSOP82Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	52Yo嘉泰姆	52Yo嘉泰姆	13.22Yo嘉泰姆	1.25\|0.82Yo嘉泰姆	5~122Yo嘉泰姆	30002Yo嘉泰姆
CXSD62782Yo嘉泰姆	SOP-82Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	102Yo嘉泰姆	3.32Yo嘉泰姆	5.52Yo嘉泰姆	0.82Yo嘉泰姆	52Yo嘉泰姆	21002Yo嘉泰姆
CXSD6279B2Yo嘉泰姆	SOP-142Yo嘉泰姆	VM 2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	102Yo嘉泰姆	52Yo嘉泰姆	13.22Yo嘉泰姆	0.82Yo嘉泰姆	122Yo嘉泰姆	20002Yo嘉泰姆
CXSD62802Yo嘉泰姆	TSSOP-242Yo嘉泰姆 \|QFN5x5-322Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	22Yo嘉泰姆	202Yo嘉泰姆	52Yo嘉泰姆	13.22Yo嘉泰姆	0.62Yo嘉泰姆	5~122Yo嘉泰姆	40002Yo嘉泰姆
CXSD6281N2Yo嘉泰姆	SOP142Yo嘉泰姆 QSOP162Yo嘉泰姆 QFN-162Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	302Yo嘉泰姆	2.92Yo嘉泰姆	13.22Yo嘉泰姆	0.92Yo嘉泰姆	122Yo嘉泰姆	40002Yo嘉泰姆
CXSD62822Yo嘉泰姆	SOP-142Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	302Yo嘉泰姆	2.22Yo嘉泰姆	13.22Yo嘉泰姆	0.62Yo嘉泰姆	122Yo嘉泰姆	50002Yo嘉泰姆
CXSD6282A2Yo嘉泰姆	SOP-142Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	302Yo嘉泰姆	2.22Yo嘉泰姆	13.22Yo嘉泰姆	0.62Yo嘉泰姆	122Yo嘉泰姆	50002Yo嘉泰姆
CXSD62832Yo嘉泰姆	SOP-142Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	252Yo嘉泰姆	2.22Yo嘉泰姆	13.22Yo嘉泰姆	0.82Yo嘉泰姆	122Yo嘉泰姆	50002Yo嘉泰姆
CXSD6284/A2Yo嘉泰姆	LQFP7x7 482Yo嘉泰姆 TQFN7x7-482Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	62Yo嘉泰姆	0.0152Yo嘉泰姆	1.42Yo嘉泰姆	6.52Yo嘉泰姆	-2Yo嘉泰姆	52Yo嘉泰姆	18002Yo嘉泰姆
CXSD62852Yo嘉泰姆	TSSOP-24P2Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	22Yo嘉泰姆	202Yo嘉泰姆	2.972Yo嘉泰姆	5.52Yo嘉泰姆	0.82Yo嘉泰姆	5~122Yo嘉泰姆	50002Yo嘉泰姆
CXSD62862Yo嘉泰姆	SOP-142Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	102Yo嘉泰姆	52Yo嘉泰姆	13.22Yo嘉泰姆	0.82Yo嘉泰姆	122Yo嘉泰姆	30002Yo嘉泰姆
CXSD62872Yo嘉泰姆	SOP-8-P\|DIP-82Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	12Yo嘉泰姆	302Yo嘉泰姆	2.92Yo嘉泰姆	13.22Yo嘉泰姆	1.22Yo嘉泰姆	122Yo嘉泰姆	30002Yo嘉泰姆
CXSD62882Yo嘉泰姆	SSOP282Yo嘉泰姆 QFN4x4-242Yo嘉泰姆	VM2Yo嘉泰姆	12Yo嘉泰姆	22Yo嘉泰姆	202Yo嘉泰姆	52Yo嘉泰姆	242Yo嘉泰姆	0.92Yo嘉泰姆	5</2Yo嘉泰姆

上一篇：CXSU63117固定工作频率的电流模式控制的的同步降压转换芯片2.5V到5.5V的输入1A的输出1A同步降压DC/DC转换器

下一篇：同步降压型PWM控制器CXSD6274 CXSD6274C固定300kHz开关频率电压模式和同步型PWM控制器来驱动双N通道mos

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