CXSD62106|A 同步buck-PWM控制器来产生VDDQ源极和陷极LDO线性调节器来产生VTT DDR2和DDR3内存提供完整的电源

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发表时间：2020-04-22浏览次数：88

CXSD62106|A 同步buck-PWM控制器来产生VDDQ源极和陷极LDO线性调节器来产生VTT DDR2和DDR3内存提供完整的电源

目录vyR嘉泰姆

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

一,产品概述(General Description) vyR嘉泰姆
The CXSD62106/A integrates a synchronous buck PWM controller to generatevyR嘉泰姆
VDDQ, a sourcing and sinking LDO linear regulator to generate VTT. It providesvyR嘉泰姆
a complete power supply for DDR2 and DDR3 memory system. It offers the lowestvyR嘉泰姆
total solution cost in system where space is at a premium.vyR嘉泰姆
The CXSD62106/A provides excellent transient response and accurate DC vyR嘉泰姆

voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the CXSD62106/A provides very high efficiency over light to heavy loads with loading-modulated switching frequencies. On TQFN4x4- 24A package, the Forced PWM vyR嘉泰姆

Mode works nearly at con-stant frequency for low-noise requirements.vyR嘉泰姆
The CXSD62106/A is equipped with accurate current-limit,output under-voltage,vyR嘉泰姆

and output over-voltage protections.A Power-On-Reset function monitors the vyR嘉泰姆

voltage on VCC prevents wrong operation during power on.The LDO is designed vyR嘉泰姆

to provide a regulated voltage with bi-directional output current for DDR-SDRAM termination.The device integrates two power transistors to source or sink current vyR嘉泰姆

up to 1.5A. It also incorporates current-limit and thermal shutdown protection.vyR嘉泰姆

The output voltage of LDO tracks the voltage at VTTREF pin. An internal resistorvyR嘉泰姆

divider is used to provide a half voltage of VDDQ for VTTREF and VTT Voltage. vyR嘉泰姆

The VTT output voltage is only requiring 20μF of ceramic output capacitance forvyR嘉泰姆

stability and fast transient response. The S3 and S5 pins provide the sleep statevyR嘉泰姆

for VTT (S3 state)and suspend state (S4/S5 state) for device, when S5 andvyR嘉泰姆
S3 are both pulled low the device provides the soft-off for VTT and VTTREF.vyR嘉泰姆
The CXSD62106/A is available in 4mmx4mm 24-pin TQFN package, and the vyR嘉泰姆

CXSD62106A is available in 3mmx3mm 20-pin TQFN package.vyR嘉泰姆
二.产品特点(Features)vyR嘉泰姆
Buck Controller (VDDQ)vyR嘉泰姆
· High Input Voltages Range from 3V to 28V Input PowervyR嘉泰姆
Provide 1.8V (DDR2), 1.5V (DDR3) or AdjustablevyR嘉泰姆
Output Voltage from 0.75V to 5.5VvyR嘉泰姆
- ±1% Accuracy Over-TemperaturevyR嘉泰姆
Integrated MOSFET Drivers and Bootstrap DiodevyR嘉泰姆
Excellent Line and Load Transient ResponsesvyR嘉泰姆
PFM Mode for Increased Light Load EfficiencyvyR嘉泰姆
Constant-On-Time Controller SchemevyR嘉泰姆
- Switching Frequency Compensation for PWMModevyR嘉泰姆
- Adjustable Switching Frequency from 100kHzvyR嘉泰姆
to 550kHz in PWM Mode with DC Output CurrentvyR嘉泰姆
Integrated MOSFET Drivers and Bootstrap DiodevyR嘉泰姆
S3 and S5 Pins Control The Device in S0, S3, or S4/S5 StatevyR嘉泰姆
Power Good MonitoringvyR嘉泰姆
70% Under-Voltage Protection (UVP)vyR嘉泰姆
125% Over-Voltage Protection (OVP)vyR嘉泰姆
Adjustable Current-Limit ProtectionvyR嘉泰姆
Using Sense Low-Side MOSFET RDS(ON)vyR嘉泰姆
±1.5A LDO Section (VTT)vyR嘉泰姆
Souring or Sinking Current up to 1.5AvyR嘉泰姆
Fast Transient Response for Output VoltagevyR嘉泰姆
Output Ceramic Capacitors Support at Least 10μF MLCCvyR嘉泰姆
VTT and VTTREF Track at Half the VDDQSNS by Internal DividervyR嘉泰姆
±20mV Accuracy for VTT and VTTREFvyR嘉泰姆

Independent Over-Current-Limit (OCL) vyR嘉泰姆

Thermal Shutdown ProtectionvyR嘉泰姆

QFN-24 4mmx4mm Thin Package (TQFN4x4-24A)vyR嘉泰姆
for CXSD62106 and QFN-20 3mmx3mm ThinvyR嘉泰姆
Package (TQFN3x3-20) for CXSD62106AvyR嘉泰姆
Lead Free and Green Devices AvailablevyR嘉泰姆

三,应用范围 (Applications)vyR嘉泰姆

DDR2, and DDR3 Memory Power SuppliesvyR嘉泰姆
SSTL-2 SSTL-18 and HSTL TerminationvyR嘉泰姆
四.下载产品资料PDF文档 vyR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！vyR嘉泰姆

QQ截图20160419174301.jpg vyR嘉泰姆

五,产品封装图 (Package)vyR嘉泰姆

vyR嘉泰姆

六.电路原理图vyR嘉泰姆

vyR嘉泰姆

七,功能概述vyR嘉泰姆

Layout Consideration (Cont.)vyR嘉泰姆

· Keep the switching nodes (UGATE, LGATE, BOOT, and PHASE) away from sensitive small signal nodesvyR嘉泰姆
(VDDQSET, VTTREF, CS, and MODE) since these nodes are fast mov ing signals. Therefore, keep tracesvyR嘉泰姆
to these nodes as short as possible and there should be no other weak signal traces in parallel with thesesvyR嘉泰姆
traces on any layer.vyR嘉泰姆
The signals going through theses traces have both high dv/dt and high di/dt, with high peak charging andvyR嘉泰姆
discharging current. The traces from the gate drivers to the MOSFETs (UGATE and LGATE) should be shortvyR嘉泰姆
and wide.vyR嘉泰姆
Place the source of the high-side MOSFET and the drain of the low-side MOSFET as close as possible. Mini-vyR嘉泰姆
mizing the impedance with wide layout plane between the two pads reduces the voltage bounce of the node.
ceramic capacitor near the drain of the high-side MOSFET as close as possible. The bulk capacitors arevyR嘉泰姆
also placednear the drain).vyR嘉泰姆
The input capacitor should be near the drain of the up per MOSFET; the high quality ceramic decoupling ca-vyR嘉泰姆
pacitor can be put close to the VCC and GND pins; the VTTREF decoupling capasitor should be close to thevyR嘉泰姆
VTTREF pin and GND; the VDDQ and VTT output ca-pacitors should be located right across their output pinvyR嘉泰姆
as clase as possible to the part to minimize parasitics.vyR嘉泰姆
The input capacitor GND should be close to the output capacitor GND and the lower MOSFET GND.vyR嘉泰姆
· The drain of the MOSFETs (VIN and PHASE nodes) should be a large plane for heat sinking. And PHASEvyR嘉泰姆
pin traces are also the return path for UGATE. Connect this pin to the converter’s upper MOSFET source.vyR嘉泰姆
· The CXSD62106/A used ripple mode control. Build the resistor divider close to the VDDQSET pin so that thevyR嘉泰姆
high imped ance trace is shorter when the output volt-age is in ad justable mode. And the VDDQSET pinvyR嘉泰姆
traces can’t be closed to the switching signal traces (UGATE, LGATE, BOOT, and PHASE)vyR嘉泰姆
The PGND trace should be a separate trace, and inde pendently go to the source of the low-side MOSFETsvyR嘉泰姆
for current limit accuracy.Decoupling capacitor, the resistor dividers, boot capacitors, and current limit stetting resistor should be close their pins. (For example, place the decouplingvyR嘉泰姆

八,相关产品 更多同类产品...... vyR嘉泰姆

Switching Regulator > Buck ControllervyR嘉泰姆
Part_No vyR嘉泰姆	Package vyR嘉泰姆	ArchivyR嘉泰姆 tectuvyR嘉泰姆	PhasevyR嘉泰姆	No.ofvyR嘉泰姆 PWMvyR嘉泰姆 OutputvyR嘉泰姆	Output vyR嘉泰姆 CurrentvyR嘉泰姆 (A) vyR嘉泰姆	InputvyR嘉泰姆 Voltage (V) vyR嘉泰姆		ReferencevyR嘉泰姆 VoltagevyR嘉泰姆 (V) vyR嘉泰姆	Bias vyR嘉泰姆 VoltagevyR嘉泰姆 (V) vyR嘉泰姆	QuiescentvyR嘉泰姆 CurrentvyR嘉泰姆 (uA) vyR嘉泰姆
Part_No vyR嘉泰姆	Package vyR嘉泰姆	ArchivyR嘉泰姆 tectuvyR嘉泰姆	PhasevyR嘉泰姆	No.ofvyR嘉泰姆 PWMvyR嘉泰姆 OutputvyR嘉泰姆	Output vyR嘉泰姆 CurrentvyR嘉泰姆 (A) vyR嘉泰姆	minvyR嘉泰姆	maxvyR嘉泰姆	ReferencevyR嘉泰姆 VoltagevyR嘉泰姆 (V) vyR嘉泰姆	Bias vyR嘉泰姆 VoltagevyR嘉泰姆 (V) vyR嘉泰姆	QuiescentvyR嘉泰姆 CurrentvyR嘉泰姆 (uA) vyR嘉泰姆
CXSD6273vyR嘉泰姆	SOP-14vyR嘉泰姆 QSOP-16vyR嘉泰姆 QFN4x4-16vyR嘉泰姆	VM vyR嘉泰姆	1 vyR嘉泰姆	1 vyR嘉泰姆	30vyR嘉泰姆	2.9 vyR嘉泰姆	13.2vyR嘉泰姆	0.9vyR嘉泰姆	12 vyR嘉泰姆	8000vyR嘉泰姆
CXSD6274vyR嘉泰姆	SOP-8vyR嘉泰姆	VM vyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	20vyR嘉泰姆	2.9 vyR嘉泰姆	13.2 vyR嘉泰姆	0.8vyR嘉泰姆	12vyR嘉泰姆	5000vyR嘉泰姆
CXSD6274CvyR嘉泰姆	SOP-8vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	20vyR嘉泰姆	2.9vyR嘉泰姆	13.2vyR嘉泰姆	0.8vyR嘉泰姆	12vyR嘉泰姆	5000vyR嘉泰姆
CXSD6275vyR嘉泰姆	QFN4x4-24vyR嘉泰姆	VMvyR嘉泰姆	2vyR嘉泰姆	1vyR嘉泰姆	60vyR嘉泰姆	3.1vyR嘉泰姆	13.2vyR嘉泰姆	0.6vyR嘉泰姆	12vyR嘉泰姆	5000vyR嘉泰姆
CXSD6276vyR嘉泰姆	SOP-8vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	20vyR嘉泰姆	2.2vyR嘉泰姆	13.2vyR嘉泰姆	0.8vyR嘉泰姆	5~12vyR嘉泰姆	2100vyR嘉泰姆
CXSD6276AvyR嘉泰姆	SOP-8vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	20vyR嘉泰姆	2.2vyR嘉泰姆	13.2vyR嘉泰姆	0.8vyR嘉泰姆	5~12vyR嘉泰姆	2100vyR嘉泰姆
CXSD6277/A/BvyR嘉泰姆	SOP8\|TSSOP8vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	5vyR嘉泰姆	5vyR嘉泰姆	13.2vyR嘉泰姆	1.25\|0.8vyR嘉泰姆	5~12vyR嘉泰姆	3000vyR嘉泰姆
CXSD6278vyR嘉泰姆	SOP-8vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	10vyR嘉泰姆	3.3vyR嘉泰姆	5.5vyR嘉泰姆	0.8vyR嘉泰姆	5vyR嘉泰姆	2100vyR嘉泰姆
CXSD6279BvyR嘉泰姆	SOP-14vyR嘉泰姆	VM vyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	10vyR嘉泰姆	5vyR嘉泰姆	13.2vyR嘉泰姆	0.8vyR嘉泰姆	12vyR嘉泰姆	2000vyR嘉泰姆
CXSD6280vyR嘉泰姆	TSSOP-24vyR嘉泰姆 \|QFN5x5-32vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	2vyR嘉泰姆	20vyR嘉泰姆	5vyR嘉泰姆	13.2vyR嘉泰姆	0.6vyR嘉泰姆	5~12vyR嘉泰姆	4000vyR嘉泰姆
CXSD6281NvyR嘉泰姆	SOP14vyR嘉泰姆 QSOP16vyR嘉泰姆 QFN-16vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	30vyR嘉泰姆	2.9vyR嘉泰姆	13.2vyR嘉泰姆	0.9vyR嘉泰姆	12vyR嘉泰姆	4000vyR嘉泰姆
CXSD6282vyR嘉泰姆	SOP-14vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	30vyR嘉泰姆	2.2vyR嘉泰姆	13.2vyR嘉泰姆	0.6vyR嘉泰姆	12vyR嘉泰姆	5000vyR嘉泰姆
CXSD6282AvyR嘉泰姆	SOP-14vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	30vyR嘉泰姆	2.2vyR嘉泰姆	13.2vyR嘉泰姆	0.6vyR嘉泰姆	12vyR嘉泰姆	5000vyR嘉泰姆
CXSD6283vyR嘉泰姆	SOP-14vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	25vyR嘉泰姆	2.2vyR嘉泰姆	13.2vyR嘉泰姆	0.8vyR嘉泰姆	12vyR嘉泰姆	5000vyR嘉泰姆
CXSD6284/AvyR嘉泰姆	LQFP7x7 48vyR嘉泰姆 TQFN7x7-48vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	6vyR嘉泰姆	0.015vyR嘉泰姆	1.4vyR嘉泰姆	6.5vyR嘉泰姆	-vyR嘉泰姆	5vyR嘉泰姆	1800vyR嘉泰姆
CXSD6285vyR嘉泰姆	TSSOP-24PvyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	2vyR嘉泰姆	20vyR嘉泰姆	2.97vyR嘉泰姆	5.5vyR嘉泰姆	0.8vyR嘉泰姆	5~12vyR嘉泰姆	5000vyR嘉泰姆
CXSD6286vyR嘉泰姆	SOP-14vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	10vyR嘉泰姆	5vyR嘉泰姆	13.2vyR嘉泰姆	0.8vyR嘉泰姆	12vyR嘉泰姆	3000vyR嘉泰姆
CXSD6287vyR嘉泰姆	SOP-8-P\|DIP-8vyR嘉泰姆	VMvyR嘉泰姆	1vyR嘉泰姆	1vyR嘉泰姆	30vyR嘉泰姆	2.9vyR嘉泰姆	13.2vyR嘉泰姆	1.2vyR嘉泰姆	12vyR嘉泰姆	3000vyR嘉泰姆
CXSD6288vyR嘉泰姆	SSOP28vyR嘉泰姆 QFN4x4-24vyR嘉泰姆

上一篇：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

下一篇：高性能笔记本电脑PWM控制器CXSD62107单相定时同步的PWM控制器它驱动N通道mosfet

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