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

发表时间：2020-04-22浏览次数：12

目录rPX嘉泰姆

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

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

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

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

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

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

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

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

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

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

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

CXSD62106A is available in 3mmx3mm 20-pin TQFN package.rPX嘉泰姆
二.产品特点(Features)rPX嘉泰姆
Buck Controller (VDDQ)rPX嘉泰姆
· High Input Voltages Range from 3V to 28V Input PowerrPX嘉泰姆
Provide 1.8V (DDR2), 1.5V (DDR3) or AdjustablerPX嘉泰姆
Output Voltage from 0.75V to 5.5VrPX嘉泰姆
- ±1% Accuracy Over-TemperaturerPX嘉泰姆
Integrated MOSFET Drivers and Bootstrap DioderPX嘉泰姆
Excellent Line and Load Transient ResponsesrPX嘉泰姆
PFM Mode for Increased Light Load EfficiencyrPX嘉泰姆
Constant-On-Time Controller SchemerPX嘉泰姆
- Switching Frequency Compensation for PWMModerPX嘉泰姆
- Adjustable Switching Frequency from 100kHzrPX嘉泰姆
to 550kHz in PWM Mode with DC Output CurrentrPX嘉泰姆
Integrated MOSFET Drivers and Bootstrap DioderPX嘉泰姆
S3 and S5 Pins Control The Device in S0, S3, or S4/S5 StaterPX嘉泰姆
Power Good MonitoringrPX嘉泰姆
70% Under-Voltage Protection (UVP)rPX嘉泰姆
125% Over-Voltage Protection (OVP)rPX嘉泰姆
Adjustable Current-Limit ProtectionrPX嘉泰姆
Using Sense Low-Side MOSFET RDS(ON)rPX嘉泰姆
±1.5A LDO Section (VTT)rPX嘉泰姆
Souring or Sinking Current up to 1.5ArPX嘉泰姆
Fast Transient Response for Output VoltagerPX嘉泰姆
Output Ceramic Capacitors Support at Least 10μF MLCCrPX嘉泰姆
VTT and VTTREF Track at Half the VDDQSNS by Internal DividerrPX嘉泰姆
±20mV Accuracy for VTT and VTTREFrPX嘉泰姆

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

Thermal Shutdown ProtectionrPX嘉泰姆

QFN-24 4mmx4mm Thin Package (TQFN4x4-24A)rPX嘉泰姆
for CXSD62106 and QFN-20 3mmx3mm ThinrPX嘉泰姆
Package (TQFN3x3-20) for CXSD62106ArPX嘉泰姆
Lead Free and Green Devices AvailablerPX嘉泰姆

三,应用范围 (Applications)rPX嘉泰姆

DDR2, and DDR3 Memory Power SuppliesrPX嘉泰姆
SSTL-2 SSTL-18 and HSTL TerminationrPX嘉泰姆
四.下载产品资料PDF文档 rPX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！rPX嘉泰姆

QQ截图20160419174301.jpg rPX嘉泰姆

五,产品封装图 (Package)rPX嘉泰姆

rPX嘉泰姆

六.电路原理图rPX嘉泰姆

rPX嘉泰姆

七,功能概述rPX嘉泰姆

Layout Consideration (Cont.)rPX嘉泰姆

· Keep the switching nodes (UGATE, LGATE, BOOT, and PHASE) away from sensitive small signal nodesrPX嘉泰姆
(VDDQSET, VTTREF, CS, and MODE) since these nodes are fast mov ing signals. Therefore, keep tracesrPX嘉泰姆
to these nodes as short as possible and there should be no other weak signal traces in parallel with thesesrPX嘉泰姆
traces on any layer.rPX嘉泰姆
The signals going through theses traces have both high dv/dt and high di/dt, with high peak charging andrPX嘉泰姆
discharging current. The traces from the gate drivers to the MOSFETs (UGATE and LGATE) should be shortrPX嘉泰姆
and wide.rPX嘉泰姆
Place the source of the high-side MOSFET and the drain of the low-side MOSFET as close as possible. Mini-rPX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 arerPX嘉泰姆
also placednear the drain).rPX嘉泰姆
The input capacitor should be near the drain of the up per MOSFET; the high quality ceramic decoupling ca-rPX嘉泰姆
pacitor can be put close to the VCC and GND pins; the VTTREF decoupling capasitor should be close to therPX嘉泰姆
VTTREF pin and GND; the VDDQ and VTT output ca-pacitors should be located right across their output pinrPX嘉泰姆
as clase as possible to the part to minimize parasitics.rPX嘉泰姆
The input capacitor GND should be close to the output capacitor GND and the lower MOSFET GND.rPX嘉泰姆
· The drain of the MOSFETs (VIN and PHASE nodes) should be a large plane for heat sinking. And PHASErPX嘉泰姆
pin traces are also the return path for UGATE. Connect this pin to the converter’s upper MOSFET source.rPX嘉泰姆
· The CXSD62106/A used ripple mode control. Build the resistor divider close to the VDDQSET pin so that therPX嘉泰姆
high imped ance trace is shorter when the output volt-age is in ad justable mode. And the VDDQSET pinrPX嘉泰姆
traces can’t be closed to the switching signal traces (UGATE, LGATE, BOOT, and PHASE)rPX嘉泰姆
The PGND trace should be a separate trace, and inde pendently go to the source of the low-side MOSFETsrPX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 decouplingrPX嘉泰姆

八,相关产品 更多同类产品...... rPX嘉泰姆

Switching Regulator > Buck ControllerrPX嘉泰姆
Part_No rPX嘉泰姆	Package rPX嘉泰姆	ArchirPX嘉泰姆 tecturPX嘉泰姆	PhaserPX嘉泰姆	No.ofrPX嘉泰姆 PWMrPX嘉泰姆 OutputrPX嘉泰姆	Output rPX嘉泰姆 CurrentrPX嘉泰姆 (A) rPX嘉泰姆	InputrPX嘉泰姆 Voltage (V) rPX嘉泰姆		ReferencerPX嘉泰姆 VoltagerPX嘉泰姆 (V) rPX嘉泰姆	Bias rPX嘉泰姆 VoltagerPX嘉泰姆 (V) rPX嘉泰姆	QuiescentrPX嘉泰姆 CurrentrPX嘉泰姆 (uA) rPX嘉泰姆
Part_No rPX嘉泰姆	Package rPX嘉泰姆	ArchirPX嘉泰姆 tecturPX嘉泰姆	PhaserPX嘉泰姆	No.ofrPX嘉泰姆 PWMrPX嘉泰姆 OutputrPX嘉泰姆	Output rPX嘉泰姆 CurrentrPX嘉泰姆 (A) rPX嘉泰姆	minrPX嘉泰姆	maxrPX嘉泰姆	ReferencerPX嘉泰姆 VoltagerPX嘉泰姆 (V) rPX嘉泰姆	Bias rPX嘉泰姆 VoltagerPX嘉泰姆 (V) rPX嘉泰姆	QuiescentrPX嘉泰姆 CurrentrPX嘉泰姆 (uA) rPX嘉泰姆
CXSD6273rPX嘉泰姆	SOP-14rPX嘉泰姆 QSOP-16rPX嘉泰姆 QFN4x4-16rPX嘉泰姆	VM rPX嘉泰姆	1 rPX嘉泰姆	1 rPX嘉泰姆	30rPX嘉泰姆	2.9 rPX嘉泰姆	13.2rPX嘉泰姆	0.9rPX嘉泰姆	12 rPX嘉泰姆	8000rPX嘉泰姆
CXSD6274rPX嘉泰姆	SOP-8rPX嘉泰姆	VM rPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	20rPX嘉泰姆	2.9 rPX嘉泰姆	13.2 rPX嘉泰姆	0.8rPX嘉泰姆	12rPX嘉泰姆	5000rPX嘉泰姆
CXSD6274CrPX嘉泰姆	SOP-8rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	20rPX嘉泰姆	2.9rPX嘉泰姆	13.2rPX嘉泰姆	0.8rPX嘉泰姆	12rPX嘉泰姆	5000rPX嘉泰姆
CXSD6275rPX嘉泰姆	QFN4x4-24rPX嘉泰姆	VMrPX嘉泰姆	2rPX嘉泰姆	1rPX嘉泰姆	60rPX嘉泰姆	3.1rPX嘉泰姆	13.2rPX嘉泰姆	0.6rPX嘉泰姆	12rPX嘉泰姆	5000rPX嘉泰姆
CXSD6276rPX嘉泰姆	SOP-8rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	20rPX嘉泰姆	2.2rPX嘉泰姆	13.2rPX嘉泰姆	0.8rPX嘉泰姆	5~12rPX嘉泰姆	2100rPX嘉泰姆
CXSD6276ArPX嘉泰姆	SOP-8rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	20rPX嘉泰姆	2.2rPX嘉泰姆	13.2rPX嘉泰姆	0.8rPX嘉泰姆	5~12rPX嘉泰姆	2100rPX嘉泰姆
CXSD6277/A/BrPX嘉泰姆	SOP8\|TSSOP8rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	5rPX嘉泰姆	5rPX嘉泰姆	13.2rPX嘉泰姆	1.25\|0.8rPX嘉泰姆	5~12rPX嘉泰姆	3000rPX嘉泰姆
CXSD6278rPX嘉泰姆	SOP-8rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	10rPX嘉泰姆	3.3rPX嘉泰姆	5.5rPX嘉泰姆	0.8rPX嘉泰姆	5rPX嘉泰姆	2100rPX嘉泰姆
CXSD6279BrPX嘉泰姆	SOP-14rPX嘉泰姆	VM rPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	10rPX嘉泰姆	5rPX嘉泰姆	13.2rPX嘉泰姆	0.8rPX嘉泰姆	12rPX嘉泰姆	2000rPX嘉泰姆
CXSD6280rPX嘉泰姆	TSSOP-24rPX嘉泰姆 \|QFN5x5-32rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	2rPX嘉泰姆	20rPX嘉泰姆	5rPX嘉泰姆	13.2rPX嘉泰姆	0.6rPX嘉泰姆	5~12rPX嘉泰姆	4000rPX嘉泰姆
CXSD6281NrPX嘉泰姆	SOP14rPX嘉泰姆 QSOP16rPX嘉泰姆 QFN-16rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	30rPX嘉泰姆	2.9rPX嘉泰姆	13.2rPX嘉泰姆	0.9rPX嘉泰姆	12rPX嘉泰姆	4000rPX嘉泰姆
CXSD6282rPX嘉泰姆	SOP-14rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	30rPX嘉泰姆	2.2rPX嘉泰姆	13.2rPX嘉泰姆	0.6rPX嘉泰姆	12rPX嘉泰姆	5000rPX嘉泰姆
CXSD6282ArPX嘉泰姆	SOP-14rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	30rPX嘉泰姆	2.2rPX嘉泰姆	13.2rPX嘉泰姆	0.6rPX嘉泰姆	12rPX嘉泰姆	5000rPX嘉泰姆
CXSD6283rPX嘉泰姆	SOP-14rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	25rPX嘉泰姆	2.2rPX嘉泰姆	13.2rPX嘉泰姆	0.8rPX嘉泰姆	12rPX嘉泰姆	5000rPX嘉泰姆
CXSD6284/ArPX嘉泰姆	LQFP7x7 48rPX嘉泰姆 TQFN7x7-48rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	6rPX嘉泰姆	0.015rPX嘉泰姆	1.4rPX嘉泰姆	6.5rPX嘉泰姆	-rPX嘉泰姆	5rPX嘉泰姆	1800rPX嘉泰姆
CXSD6285rPX嘉泰姆	TSSOP-24PrPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	2rPX嘉泰姆	20rPX嘉泰姆	2.97rPX嘉泰姆	5.5rPX嘉泰姆	0.8rPX嘉泰姆	5~12rPX嘉泰姆	5000rPX嘉泰姆
CXSD6286rPX嘉泰姆	SOP-14rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	10rPX嘉泰姆	5rPX嘉泰姆	13.2rPX嘉泰姆	0.8rPX嘉泰姆	12rPX嘉泰姆	3000rPX嘉泰姆
CXSD6287rPX嘉泰姆	SOP-8-P\|DIP-8rPX嘉泰姆	VMrPX嘉泰姆	1rPX嘉泰姆	1rPX嘉泰姆	30rPX嘉泰姆	2.9rPX嘉泰姆	13.2rPX嘉泰姆	1.2rPX嘉泰姆	12rPX嘉泰姆	3000rPX嘉泰姆
CXSD6288rPX嘉泰姆	SSOP28rPX嘉泰姆 QFN4x4-24rPX嘉泰姆

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