CXSD62104双降压恒时同步的PWM控制器两个低损耗稳压器PWM1和PWM2的输出可以从2V调整到5.5V

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CXSD62104双降压恒时同步的PWM控制器两个低损耗稳压器PWM1和PWM2的输出可以从2V调整到5.5V

目录Prm嘉泰姆

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

一,产品概述(General Description) Prm嘉泰姆

The CXSD62104 integrates dual step-down, constant-ontime, synchronousPrm嘉泰姆

PWM controllers (that drives dual N-channel MOSFETs for each channel) andPrm嘉泰姆
two low drop-out regulators as well as various protections into a chip.The PWMPrm嘉泰姆
controllers step down high voltage of a battery to generate low-voltage for NBPrm嘉泰姆
applications. The output of PWM1 and PWM2 can be adjusted from 2V to 5.5VPrm嘉泰姆
by setting a resistive voltage-divider from VOUTx to GND.The linear regulatorsPrm嘉泰姆
provide 5V and 3.3V output for standby power supply. The linear regulatorsPrm嘉泰姆

provide up to 100mA output current. When the PWMx output voltage is higher Prm嘉泰姆

than LDOx bypass threshold, the related LDOx regulator is shut off and its Prm嘉泰姆

output is connected to VOUTx by internal switchover MOSFET. It can save power dissipation.Prm嘉泰姆
The CXSD62104 provides excellent transient response and accurate DC Prm嘉泰姆

output voltage in either PFM or PWM Mode.In Pulse-Frequency Mode (PFM), Prm嘉泰姆

the CXSD62104 provides very high efficiency over light to heavy loads with Prm嘉泰姆

loading-modulated switching frequencies. The Forced-PWM mode works nearly Prm嘉泰姆

at constant frequency for low-noise requirements. The unique ultrasonic modePrm嘉泰姆

maintains the switching frequency above 25KHz, which eliminates noise in audio applications.Prm嘉泰姆

The CXSD62104 is equipped with accurate sourcing cur-rent-limit, outputPrm嘉泰姆

under-voltage and output over-voltage protections, being perfect for NB Prm嘉泰姆

applications. A 1.7ms (typ.) digital soft-start can reduce the start-up current. Prm嘉泰姆

A soft-stop function actively discharges the output capaci-tors by the discharge Prm嘉泰姆

device. The CXSD62104 has individual enable controls for PWM channels and Prm嘉泰姆

LDOs. Pulling both ENPWM pin and ENLDO pin low shuts down the whole chipPrm嘉泰姆

with low quiescent current close to zero.Prm嘉泰姆
The CXSD62104 is available in a TQFN4x4-24A package.Prm嘉泰姆
二.产品特点(Features)Prm嘉泰姆
Wide Input Voltage Range from 6V to 25VPrm嘉泰姆
Provide 4 Independent Outputs with ±1.5% Accu-Prm嘉泰姆
racy Over-TemperaturePrm嘉泰姆
- PWM1 Controller with Adjustable (2V to 5.5V) Out-putPrm嘉泰姆
PWM2 Controller with Adjustable (2V to 5.5V) Out-putPrm嘉泰姆
100mA Low Dropout Regulator (LDO5) with Fixed 5V OutputPrm嘉泰姆
100mA Low Dropout Regulator (LDO3) with Fixed 3.3V OutputPrm嘉泰姆
Excellent Line/Load Regulations about ±1.5% Over-Temperature RangePrm嘉泰姆
±1%, (±1.5%, 50μA) 2.0V Reference Voltage OutputPrm嘉泰姆
Built-In POR Control Scheme ImplementedPrm嘉泰姆
Selectable Forced-PWM or Automatic PFM/PWMPrm嘉泰姆
(with Selectable Ultrasonic Operation)Prm嘉泰姆
Constant-On-Time Control Scheme with FrequencyPrm嘉泰姆
Compensation for PWM ModePrm嘉泰姆
Selectable Switching Frequency in PWM ModePrm嘉泰姆
Built-in Digital Soft-Start for PWM Outputs and Soft-Prm嘉泰姆
Stop for PWM Outputs and LDO OutputsPrm嘉泰姆
Integrated Bootstrap Forward P-CH MOSFETPrm嘉泰姆
High Efficiency over Light to Full Load Range (PWMs)Prm嘉泰姆
Built-in Power Good Indicators (PWMs)Prm嘉泰姆
Independent Enable Inputs (PWMs, LDO)Prm嘉泰姆

70% Under-Voltage and 125% Over-Voltage Protec-tions (PWM)Prm嘉泰姆

Adjustable Current-Limit Protection (PWMs)Prm嘉泰姆
- Using Sense Low-Side MOSFET’s RDS(ON)Prm嘉泰姆
Over-Temperature ProtectionPrm嘉泰姆
4mmx4mm Thin QFN-24 (TQFN4x4-24A) packagePrm嘉泰姆
Lead Free and Green Device Available (RoHS Compliant)Prm嘉泰姆

三,应用范围 (Applications)Prm嘉泰姆

Notebook and Sub-Notebook ComputersPrm嘉泰姆

Portable DevicesPrm嘉泰姆
DDR1, DDR2, and DDR3 Power SuppliesPrm嘉泰姆
3-Cell and 4-Cell Li+ Battery-Powered DevicesPrm嘉泰姆
Graphic CardsPrm嘉泰姆
Game ConsolesPrm嘉泰姆
TelecommunicationsPrm嘉泰姆

四.下载产品资料PDF文档 Prm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！Prm嘉泰姆

QQ截图20160419174301.jpg Prm嘉泰姆

五,产品封装图 (Package)Prm嘉泰姆

Prm嘉泰姆

六.电路原理图Prm嘉泰姆

Prm嘉泰姆

七,功能概述Prm嘉泰姆

Input Capacitor SelectionPrm嘉泰姆
The input capacitor is chosen based on the voltage rating and the RMS current rating. For reliable operation, selectPrm嘉泰姆
the capacitor voltage rating to be at least 1.3 times higher than the maximum input voltage. The maximum RMSPrm嘉泰姆
current rating requirement is approximately IOUT/2, where IOUT is the load current. During power up, the input capaci-tors have to handle large amount of surge current. In low-duty notebook appliactions, ceramic capacitors arePrm嘉泰姆
remmended. The capacitors must be connected between the drain of high-side MOSFET and the source of low-Prm嘉泰姆
side MOSFET with very low-impeadance PCB layout. Prm嘉泰姆
MOSFET SelectionPrm嘉泰姆
The application for a notebook battery with a maximum volt-age of 24V, at least a minimum 30V MOSFETs shouldPrm嘉泰姆
be used. The design has to trade off the gate charge with the RDS(ON) of the MOSFET:Prm嘉泰姆
· For the low-side MOSFET, before it is turned on, the body diode has been conducted. The low-side MOSFETPrm嘉泰姆
driver will not charge the miller capacitor of this MOSFET.Prm嘉泰姆
In the turning off process of the low-side MOSFET,the load current will shift to the body diode first. ThePrm嘉泰姆
high dv/dt of the phase node voltage will charge the miller capacitor through the low-side MOSFET driverPrm嘉泰姆
sinking current path. This results in much less switching loss of the low-side MOSFETs. The dutyPrm嘉泰姆
cycle is often very small in high battery voltage applications, and the low-side MOSFET will con-Prm嘉泰姆
duct most of the switching cycle; therefore, the less the RDS(ON) of the low-side MOSFET, the less the powerPrm嘉泰姆
loss. The gate charge for this MOSFET is usually a secondary consideration. The high-side MOSFETPrm嘉泰姆
does not have this zero voltage switching condition, and because it conducts for less timePrm嘉泰姆
compared to the low-side MOSFET, the switching loss tends to be dominant. Priority should be givenPrm嘉泰姆
to the MOSFETs with less gate charge, so that both the gate driver loss and switching loss will be minimized.Prm嘉泰姆
The selection of the N-channel power MOSFETs are de-termined by the RDS(ON), reversing transfer capacitancePrm嘉泰姆
(CRSS) and maximum output current requirement. The losses in the MOSFETs have two components: conduc-Prm嘉泰姆
tion loss and transition loss. For the high-side and low-side MOSFETs, the losses are approximately given byPrm嘉泰姆
the following equations:Prm嘉泰姆
Layout ConsiderationPrm嘉泰姆
In any high switching frequency converter, a correct layout is important to ensure proper operation of the regulator.Prm嘉泰姆
With power devices switching at higher frequency, the resulting current transient will cause voltage spike acrossPrm嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionPrm嘉泰姆
of the PWM MOSFET. Before turn-off condition, the MOSFET is carrying the full load current. During turn-off,Prm嘉泰姆
current stops flowing in the MOSFET and is freewheeling by the lower MOSFET and parasitic diode. Any parasiticPrm嘉泰姆
inductance of the circuit generates a large voltage spike during the switching interval. In general, using short andPrm嘉泰姆
wide printed circuit traces should minimize interconnect-ing impedances and the magnitude of voltage spike. AndPrm嘉泰姆
signal and power grounds are to be kept separating and finally combined to use the ground plane construction orPrm嘉泰姆

single point grounding. The best tie-point between the signal ground and the power ground is at the negativePrm嘉泰姆
side of the output capacitor on each channel, where there is less noise. Noisy traces beneath the IC are notPrm嘉泰姆
recommended. Below is a checklist for your layout:Prm嘉泰姆
Layout Consideration (Cont.)Prm嘉泰姆
Keep the switching nodes (UGATEx, LGATEx, BOOTx,and PHASEx) away from sensitive small signal nodesPrm嘉泰姆
(REF, ILIMx, and FBx) since these nodes are fast mov-ing signals. Therefore, keep traces to these nodes asPrm嘉泰姆
short as possible and there should be no other weak signal traces in parallel with theses traces on any layer.Prm嘉泰姆

Minimizing the impedance with wide layout plane be-tween the two pads reduces the voltage bounce ofPrm嘉泰姆

CXSD62104Prm嘉泰姆

八,相关产品 更多同类产品...... Prm嘉泰姆

Switching Regulator > Buck ControllerPrm嘉泰姆
Part_No Prm嘉泰姆	Package Prm嘉泰姆	ArchiPrm嘉泰姆 tectuPrm嘉泰姆	PhasePrm嘉泰姆	No.ofPrm嘉泰姆 PWMPrm嘉泰姆 OutputPrm嘉泰姆	Output Prm嘉泰姆 CurrentPrm嘉泰姆 (A) Prm嘉泰姆	InputPrm嘉泰姆 Voltage (V) Prm嘉泰姆		ReferencePrm嘉泰姆 VoltagePrm嘉泰姆 (V) Prm嘉泰姆	Bias Prm嘉泰姆 VoltagePrm嘉泰姆 (V) Prm嘉泰姆	QuiescentPrm嘉泰姆 CurrentPrm嘉泰姆 (uA) Prm嘉泰姆
Part_No Prm嘉泰姆	Package Prm嘉泰姆	ArchiPrm嘉泰姆 tectuPrm嘉泰姆	PhasePrm嘉泰姆	No.ofPrm嘉泰姆 PWMPrm嘉泰姆 OutputPrm嘉泰姆	Output Prm嘉泰姆 CurrentPrm嘉泰姆 (A) Prm嘉泰姆	minPrm嘉泰姆	maxPrm嘉泰姆	ReferencePrm嘉泰姆 VoltagePrm嘉泰姆 (V) Prm嘉泰姆	Bias Prm嘉泰姆 VoltagePrm嘉泰姆 (V) Prm嘉泰姆	QuiescentPrm嘉泰姆 CurrentPrm嘉泰姆 (uA) Prm嘉泰姆
CXSD6273Prm嘉泰姆	SOP-14Prm嘉泰姆 QSOP-16Prm嘉泰姆 QFN4x4-16Prm嘉泰姆	VM Prm嘉泰姆	1 Prm嘉泰姆	1 Prm嘉泰姆	30Prm嘉泰姆	2.9 Prm嘉泰姆	13.2Prm嘉泰姆	0.9Prm嘉泰姆	12 Prm嘉泰姆	8000Prm嘉泰姆
CXSD6274Prm嘉泰姆	SOP-8Prm嘉泰姆	VM Prm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	20Prm嘉泰姆	2.9 Prm嘉泰姆	13.2 Prm嘉泰姆	0.8Prm嘉泰姆	12Prm嘉泰姆	5000Prm嘉泰姆
CXSD6274CPrm嘉泰姆	SOP-8Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	20Prm嘉泰姆	2.9Prm嘉泰姆	13.2Prm嘉泰姆	0.8Prm嘉泰姆	12Prm嘉泰姆	5000Prm嘉泰姆
CXSD6275Prm嘉泰姆	QFN4x4-24Prm嘉泰姆	VMPrm嘉泰姆	2Prm嘉泰姆	1Prm嘉泰姆	60Prm嘉泰姆	3.1Prm嘉泰姆	13.2Prm嘉泰姆	0.6Prm嘉泰姆	12Prm嘉泰姆	5000Prm嘉泰姆
CXSD6276Prm嘉泰姆	SOP-8Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	20Prm嘉泰姆	2.2Prm嘉泰姆	13.2Prm嘉泰姆	0.8Prm嘉泰姆	5~12Prm嘉泰姆	2100Prm嘉泰姆
CXSD6276APrm嘉泰姆	SOP-8Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	20Prm嘉泰姆	2.2Prm嘉泰姆	13.2Prm嘉泰姆	0.8Prm嘉泰姆	5~12Prm嘉泰姆	2100Prm嘉泰姆
CXSD6277/A/BPrm嘉泰姆	SOP8\|TSSOP8Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	5Prm嘉泰姆	5Prm嘉泰姆	13.2Prm嘉泰姆	1.25\|0.8Prm嘉泰姆	5~12Prm嘉泰姆	3000Prm嘉泰姆
CXSD6278Prm嘉泰姆	SOP-8Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	10Prm嘉泰姆	3.3Prm嘉泰姆	5.5Prm嘉泰姆	0.8Prm嘉泰姆	5Prm嘉泰姆	2100Prm嘉泰姆
CXSD6279BPrm嘉泰姆	SOP-14Prm嘉泰姆	VM Prm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	10Prm嘉泰姆	5Prm嘉泰姆	13.2Prm嘉泰姆	0.8Prm嘉泰姆	12Prm嘉泰姆	2000Prm嘉泰姆
CXSD6280Prm嘉泰姆	TSSOP-24Prm嘉泰姆 \|QFN5x5-32Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	2Prm嘉泰姆	20Prm嘉泰姆	5Prm嘉泰姆	13.2Prm嘉泰姆	0.6Prm嘉泰姆	5~12Prm嘉泰姆	4000Prm嘉泰姆
CXSD6281NPrm嘉泰姆	SOP14Prm嘉泰姆 QSOP16Prm嘉泰姆 QFN-16Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	30Prm嘉泰姆	2.9Prm嘉泰姆	13.2Prm嘉泰姆	0.9Prm嘉泰姆	12Prm嘉泰姆	4000Prm嘉泰姆
CXSD6282Prm嘉泰姆	SOP-14Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	30Prm嘉泰姆	2.2Prm嘉泰姆	13.2Prm嘉泰姆	0.6Prm嘉泰姆	12Prm嘉泰姆	5000Prm嘉泰姆
CXSD6282APrm嘉泰姆	SOP-14Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	30Prm嘉泰姆	2.2Prm嘉泰姆	13.2Prm嘉泰姆	0.6Prm嘉泰姆	12Prm嘉泰姆	5000Prm嘉泰姆
CXSD6283Prm嘉泰姆	SOP-14Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	1Prm嘉泰姆	25Prm嘉泰姆	2.2Prm嘉泰姆	13.2Prm嘉泰姆	0.8Prm嘉泰姆	12Prm嘉泰姆	5000Prm嘉泰姆
CXSD6284/APrm嘉泰姆	LQFP7x7 48Prm嘉泰姆 TQFN7x7-48Prm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	6Prm嘉泰姆	0.015Prm嘉泰姆	1.4Prm嘉泰姆	6.5Prm嘉泰姆	-Prm嘉泰姆	5Prm嘉泰姆	1800Prm嘉泰姆
CXSD6285Prm嘉泰姆	TSSOP-24PPrm嘉泰姆	VMPrm嘉泰姆	1Prm嘉泰姆	2Prm嘉泰姆	20Prm嘉泰姆	2.97Prm嘉泰姆	5.5Prm嘉泰姆	0.8Prm嘉泰姆	5~12Prm嘉泰姆	5000Prm嘉泰姆
Prm嘉泰姆

上一篇：两相电压模式和固定频率降压控制器CXSD62103从100kHz到800kHz的可编程脉宽调制开关频率无损耗低边MOSFET Ron电流传感

下一篇：电荷泵CXSD62105笔记本电脑的系统电源脉宽调制控制器集成了双降压恒时同步的脉宽调制控制器

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