大功率降压同步DC/DC控制器CXSD6278驱动外部N通道mosfet的300kHz恒频电压模式同步开关控制器。

大功率降压同步DC/DC控制器CXSD6278驱动外部N通道mosfet的300kHz恒频电压模式同步开关控制器。

产品型号：CXSD6278
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：39 次
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产品简介

CXSD6278是一个300kHz恒频电压模式同步开关控制器，驱动外部N通道mosfet。当输入电源下降到输出时，上MOSFET保持开启，达到100%的占空比。为了快速的瞬态响应，优化了内环补偿，消除了外环补偿网络。

技术参数

输入电压范围 (VIN)≤ 3.3~5.5V
输出电压 (VOUT)ADJV
输出电流 (IOUT)10A
工作频率1500 Hz
转换效率95%%
封装类型SOP-8
TopologyBuck VM降压型芯片
Control method No. of PWM Outputs:1
Switching frequency1500
ProtectionPhase: 1
Features静态工作电流 Quiescent Current (typ)(uA):2100
Application Bias Voltage (typ) (V):5
Operating temp-40℃~125℃
Reference design反馈电压Reference Voltage(V):0.8

产品详细介绍

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 CXSD6278 is a 300kHz constant frequency voltagemode synchronous switching controller that drives exter-nal N-channel MOSFETs. When the input supply dropsclose to output, the upper MOSFET remains on, achiev-ing 100% duty cycle. Internal loop compensation is opti-mized for fast transient response, eliminating externalcompensation network. The precision 0.8V referencemakes this part suitable for a wide variety of low voltageapplications. Soft-start is internally set to 2ms, limitingthe input in-rush current and preventing the output fromovershoot during powering up.The CXSD6278 has over current and short circuitprotections. Over current protection is achieved by moni-toring the voltage drop across the high side MOSFET,eliminating the need for a current sensing resistor andshort circuit condition is detected through the FB pin. Ifeither fault conditions occur, the CXSD6278 would initiatethe soft-start cycle. After three cycles and if the fault condi-tion persists, the controller will be shut down. To restartthe controller, either recycle the VCC supply or momen-tarily pull the OSCSET pin below 1.25V.The CXSD6278 can be shutdown by pulling the OCSETpin below 1.25V. In shutdown, both gate drive signals willbe low. The controller is available in a small SOP-8package.

   产品特点 返回TOP

•     Operates from +5V Input

•     0.8V Internal Reference Voltage 

        - ±1.5% Accuracy Over Line, Load and Temperature

•     0.8V to VCC Output Range

•      Full Duty Cycle Range 

      - 0% to 100%

•     Internal Loop Compensation

•     Internal Soft-Start

         - Typical 2ms

•     Programmable Over-Current Protection

         - Lossless Sensing Using MOSFET RDS (ON)

•      Under-Voltage Protection

•     Drives External  N-Channel MOSFETs

•      Shutdown Control

•     Small SOP-8 Package

•      Lead Free and Green Devices Avaliable

         (RoHS Compliant)

   应用范围 返回TOP

•    Motherboard

•    Graphics Cards

•    Cable or DSL Modems, Set Top Boxes

•    DSP Supplies

•    Memory Supplies

•    5V Input DC-DC Regulators

•    Distributed Power Supplies

   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！

 QQ截图20160419174301.jpg

产品封装图 返回TOP

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电路原理图 返回TOP

 

 

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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

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