首页 > 产品中心 > 电源管理芯片 > DC-DC转换器 > 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

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

产品型号：	CXSD62106\|A
产品类型：	DC-DC转换器
产品系列：	Buck降压型芯片
产品状态：	量产
浏览次数：	44 次

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产品简介

CXSD62106|A集成了一个同步buck-PWM控制器来产生VDDQ，一种产生VTT的源极和陷极LDO线性调节器。它提供了DDR2和DDR3存储系统的完整电源。它提供最低的在空间处于溢价的系统中的解决方案总成本。CXSD62106/A提供出色的瞬态响应和准确的直流电PFM或PWM模式下的电压输出。在脉冲频率模式（PFM）中，CXSD62106/A通过加载调制开关频率在轻到重负载上提供非常高的效率

技术参数

输入电压范围 (VIN)	≤ 3~28V
输出电压 (VOUT)	ADJV
输出电流 (IOUT)	20A
工作频率	1500 Hz
转换效率	95%%
封装类型	TQFN4x4-24\|TQFN3x3-20
Topology	Buck COT降压型芯片
Control method	No. of PWM Outputs:2
Switching frequency	1500
Protection	Phase: 1
Features	静态工作电流 Quiescent Current (typ)(uA):800
Application	Bias Voltage (typ) (V):5
Operating temp	-40℃~125℃
Reference design	反馈电压Reference Voltage(V):0.75

产品详细介绍

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)
The CXSD62106/A integrates a synchronous buck PWM controller to generate
VDDQ, a sourcing and sinking LDO linear regulator to generate VTT. It provides
a complete power supply for DDR2 and DDR3 memory system. It offers the lowest
total solution cost in system where space is at a premium.
The CXSD62106/A provides excellent transient response and accurate DC

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

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

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

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

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

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

The output voltage of LDO tracks the voltage at VTTREF pin. An internal resistor

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

The VTT output voltage is only requiring 20μF of ceramic output capacitance for

stability and fast transient response. The S3 and S5 pins provide the sleep state

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

CXSD62106A is available in 3mmx3mm 20-pin TQFN package.
二.产品特点(Features)
Buck Controller (VDDQ)
· High Input Voltages Range from 3V to 28V Input Power
Provide 1.8V (DDR2), 1.5V (DDR3) or Adjustable
Output Voltage from 0.75V to 5.5V
- ±1% Accuracy Over-Temperature
Integrated MOSFET Drivers and Bootstrap Diode
Excellent Line and Load Transient Responses
PFM Mode for Increased Light Load Efficiency
Constant-On-Time Controller Scheme
- Switching Frequency Compensation for PWMMode
- Adjustable Switching Frequency from 100kHz
to 550kHz in PWM Mode with DC Output Current
Integrated MOSFET Drivers and Bootstrap Diode
S3 and S5 Pins Control The Device in S0, S3, or S4/S5 State
Power Good Monitoring
70% Under-Voltage Protection (UVP)
125% Over-Voltage Protection (OVP)
Adjustable Current-Limit Protection
Using Sense Low-Side MOSFET RDS(ON)
±1.5A LDO Section (VTT)
Souring or Sinking Current up to 1.5A
Fast Transient Response for Output Voltage
Output Ceramic Capacitors Support at Least 10μF MLCC
VTT and VTTREF Track at Half the VDDQSNS by Internal Divider
±20mV Accuracy for VTT and VTTREF

Independent Over-Current-Limit (OCL)

Thermal Shutdown Protection

QFN-24 4mmx4mm Thin Package (TQFN4x4-24A)
for CXSD62106 and QFN-20 3mmx3mm Thin
Package (TQFN3x3-20) for CXSD62106A
Lead Free and Green Devices Available

三,应用范围 (Applications)

DDR2, and DDR3 Memory Power Supplies
SSTL-2 SSTL-18 and HSTL Termination
四.下载产品资料PDF文档

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！

QQ截图20160419174301.jpg

五,产品封装图 (Package)

六.电路原理图

七,功能概述

Layout Consideration (Cont.)

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

八,相关产品 更多同类产品......

Switching Regulator > Buck Controller
Part_No	Package	Archi tectu	Phase	No.of PWM Output	Output Current (A)	Input Voltage (V)		Reference Voltage (V)	Bias Voltage (V)	Quiescent Current (uA)
Part_No	Package	Archi tectu	Phase	No.of PWM Output	Output Current (A)	min	max	Reference Voltage (V)	Bias Voltage (V)	Quiescent Current (uA)
CXSD6273	SOP-14 QSOP-16 QFN4x4-16	VM	1	1	30	2.9	13.2	0.9	12	8000
CXSD6274	SOP-8	VM	1	1	20	2.9	13.2	0.8	12	5000
CXSD6274C	SOP-8	VM	1	1	20	2.9	13.2	0.8	12	5000
CXSD6275	QFN4x4-24	VM	2	1	60	3.1	13.2	0.6	12	5000
CXSD6276	SOP-8	VM	1	1	20	2.2	13.2	0.8	5~12	2100
CXSD6276A	SOP-8	VM	1	1	20	2.2	13.2	0.8	5~12	2100
CXSD6277/A/B	SOP8\|TSSOP8	VM	1	1	5	5	13.2	1.25\|0.8	5~12	3000
CXSD6278	SOP-8	VM	1	1	10	3.3	5.5	0.8	5	2100
CXSD6279B	SOP-14	VM	1	1	10	5	13.2	0.8	12	2000
CXSD6280	TSSOP-24 \|QFN5x5-32	VM	1	2	20	5	13.2	0.6	5~12	4000
CXSD6281N	SOP14 QSOP16 QFN-16	VM	1	1	30	2.9	13.2	0.9	12	4000
CXSD6282	SOP-14	VM	1	1	30	2.2	13.2	0.6	12	5000
CXSD6282A	SOP-14	VM	1	1	30	2.2	13.2	0.6	12	5000
CXSD6283	SOP-14	VM	1	1	25	2.2	13.2	0.8	12	5000
CXSD6284/A	LQFP7x7 48 TQFN7x7-48	VM	1	6	0.015	1.4	6.5	-	5	1800
CXSD6285	TSSOP-24P	VM	1	2	20	2.97	5.5	0.8	5~12	5000
CXSD6286	SOP-14	VM	1	1	10	5	13.2	0.8	12	3000
CXSD6287	SOP-8-P\|DIP-8	VM	1	1	30	2.9	13.2	1.2	12	3000
CXSD6288	SSOP28 QFN4x4-24	VM	1	2	20	5	24	0.9	5	1200
CXSD6289	SOP-20	VM	1	2	20	2.2	13.2	0.6	5~12	4000
CXSD6290	SOP8\|DFN3x3-10	VM	1	2	-	-	-	-	5~12	550
CXSD6291HC	DIP8\|SOP-8	VM	1	1	1	1.2	9	24	5	9 ~ 24
CXSD6292	SSOP16 QFN4x4-16 TQFN3x3-16	VM	1	1	25	3	25	0.6	5	1700
CXSD6293	TDFN3x3-10	COT	1	1	25	3	25	0.5	5	350
CXSD6294	QFN4x4-24	CM	2	1	40	4.5	13.2	0.6	5~12	4000
CXSD6295	SOP8P TDFN3x3-10	VM	1	1	20	3	13.2	0.8	5~12	2500
CXSD6296A\|B\|C\|D	SOP8P	VM	1	1	25	3	13.2	0.6\|0.8	5~12	1200
CXSD6297	TDFN3x3-10	VM	1	1	25	4	13.2	0.8	5~12	2000
CXSD6298	TDFN3x3-10	COT	1	1	25	4.5	25	0.6	5~12	80
CXSD6299\|A	SOP-8P	VM	1	1	25	4.5	13.2	0.8	5~12	16000
CXSD62100	TQFN3x3-10	VM	1	1	25	4.5	13.2	0.6	5~12	2500
CXSD62101\|L	TDFN3x3-10	COT	1	1	30	3	25	0.8	5~12	2000
CXSD62102	TQFN3x3-16	COT	1	1	30	1.8	28	0.6	5	600
CXSD62102A	TQFN 3x3 16	COT	1	1	30	1.8	28	0.6	5	600
CXSD62103	QFN4x4-24	VM	2	1	50	4.5	13.2	0.6	5~12	5000
CXSD62104	TQFN4x4-24	COT	1	2	15	6	25	2	N	550
CXSD62105	TQFN4x4-24	COT	1	2	15	6	25	2	N	550
CXSD62106\|A	TQFN4x4-4 TQFN3x3-20	COT	1	2	20	3	28	0.75	5	800
CXSD62107	TQFN3x3-16	COT	1	1	20	1.8	28	0.75	5	400
CXSD62108	QFN3.5x3.5-14 TQFN3x3-16	COT	1	1	20	1.8	28	0.75	5	400
CXSD62109	TQFN3x3-16	COT	1	2	20	1.8	28	0.75	5	400
CXSD62110	QFN3x3-20 TQFN3x3-16	COT	1	2	20	3	28	1.8\|1.5\|0.5	5	740
CXSD62111	TQFN4x4-24 \|QFN3x3-20	CM	1	2	15	5	28	0.5	N	3000
CXSD62112	TDFN3x3-10	COT	1	1	20	1.8	28	0.5	5	250
CXSD62113\|C	TQFN3x3-20	COT	1	2	15	6	25	2	N	550
CXSD62113E	TQFN 3x3 20	COT	2	2	11	6	25	2	N	550
CXSD62114	TQFN3x3-20	COT	2	2	11	5.5	25	2	N	280
CXSD62115	QFN4x4-24	VM	2	1	60	3.1	13.2	0.85	12	5000
CXSD62116A\|B\|C	SOP-8P	VM	1	1	20	2.9	13.2	0.8	12	16000
CXSD62117	SOP-20	VM	2	2	30	10	13.2	1	12	5000
CXSD62118	TDFN3x3-10	COT	1	1	25	1.8	28	0.7	5	250
CXSD62119	TQFN3x3-20	COT	2	1	40	1.8	25	REFIN Setting	5	700
CXSD62120	QFN 3x3 20 TQFN 3x3 16	COT	1	2	20	3	28	1.8\|1.5 1.35\|1.2 0.5	5	800
CXSD62121A	TQFN3x3 20	COT	1	2	15	3	28	0.75	5	220
CXSD62121B	TQFN3x3 20	COT	1	2	15	3	28	0.75	5	220
CXSD62121	TQFN3x3-20	COT	1	2	20	3	28	0.75	5	180

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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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