DDR总功率解决方案同步BUCK控制器与1.5A LDO CXSD62120 VDDQ源极和陷极LDO线性调节器

CXSD62120集成了一个同步buck-PWM控制器来产生VDDQ，一个源极和陷极LDO线性调节器来产生VTT。它为DDR2、DDR3、DDR3L和DDR4存储系统提供完整的电源。它提供了系统中最低的总体解决方案成本，而空间是一个溢价。

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

---

The CXSD62120 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, DDR3, DDR3L and DDR4 memory system. It offers the lowest total solution cost in system where space is at a premium. The CXSD62120 provides excellent transient response and accurate DC voltage output in PFM Mode. In Pulse Frequency Mode (PFM), the CXSD62120 provides very high efficiency over light to heavy loads with loading-modulated switching frequencies. The CXSD62120 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. An internal resistor divider is used to provide a half voltage of VDDQSNS for VTTREF and VTT Voltage. The VTT output voltage is only requiring 20mF 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 CXSD62120 is available in 3mmx3mm 20-pin QFN and 3mmx3mm 16-pin TQFN packages.

   产品特点 返回TOP

---

Buck Controller (VDDQ) 

· High Input Voltages Range from 3V to 28V Input Power 

· Provide 1.8V (DDR2), 1.5V (DDR3), 1.35V (DDR3L), 1.2V(DDR4) or Adjustable Output Voltage from 0. 5V to 2V. 

- ±1% Accuracy Over-Temperature 

· Build in VREF Voltage 1.8V ±1% Accuracy over Temperature 

· Integrated MOSFET Drivers 

· Integrated Bootstrap Forward P-CH MOSFET 

· Excellent Line and Load Transient Responses 

· PFM Mode for Increased Light Load Efficiency 

· Selectable 500kHz / 670kHz Switching Frequencies 

· Integrated MOSFET Drivers and Bootstrap Diode 

· S3 and S5 Pins Control The Device in S0, S3, or S4/S5 State 

· Power Good Monitoring 

· 50% Under-Voltage Protection (UVP) 

· 125% Over-Voltage Protection (OVP) 

· Adjustable Current-Limit Protection 

- Using Sense Low-Side MOSFET RDS(ON) 

· QFN-20 3mmx3mm Package (QFN-20) and QFN-16 3mmx3mm Thin Package (TQFN-16) 

· Lead Free Available (RoHS Compliant) +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 10mF 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

   应用范围 返回TOP

---

· DDR2,DDR3,DDR3LandDDR4MemoryPowerSup- plies 

· SSTL-2 SSTL-18 and HSTL Termination

   技术规格书（产品PDF) 返回TOP 

---

     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！

 

产品封装图 返回TOP

---

电路原理图 返回TOP

 

---

 

相关芯片选择指南 返回TOP              更多同类产品......  

---

 

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