CXSD62108单相恒定时间同步的脉宽调制控制器驱动N通道mosfet笔记本电脑中产生低压芯片组RAM电源的电压

CXSD62108单相恒定时间同步的脉宽调制控制器驱动N通道mosfet笔记本电脑中产生低压芯片组RAM电源的电压

产品型号：CXSD62108
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：41 次
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产品简介

CXSD62108配备了精确的正电流限制、输出欠压和输出过电压保护，非常适合NB应用。
上电复位功能监控VCC和PVCC上的电压防止上电时误操作。CXSD62108具有1.2ms数字
软启动和内置的集成输出放电装置软停止。一个内部集成软启动可编程增加输出电压
降低启动电流的回转率。主动软停止功能放电输出电容器

技术参数

输入电压范围 (VIN)≤ 1.8~28V
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QFN3.5x3.5-14|TQFN3x3-16
TopologyBuck COT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):400
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

目录

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 CXSD62108 is a single-phase, constant-on-time,synchronous PWM
controller, which drives N-channel MOSFETs. The CXSD62108 steps down high
voltage to generate low-voltage chipset or RAM supplies in notebook computers.
      The CXSD62108 provides excellent transient response and accurate DC
voltage output in either PFM or PWM Mode.In Pulse Frequency Mode (PFM),
the CXSD62108 provides very high efficiency over light to heavy loads with 

loading-modulated switching frequencies. In PWM Mode, the converter works

nearly at constant frequency for low-noise requirements.
    The CXSD62108 is equipped with accurate positive current-limit, output
under-voltage, and output over-voltage protections, perfect for NB applications.
The Power-On-Reset function monitors the voltage on VCC and PVCC to
prevent wrong operation during power-on. The CXSD62108 has a 1.2ms digital
soft-start and built-in an integrated output discharge device for soft-stop. An 

internal integrated soft-start ramps up the output voltage with programmable 

slew rate to reduce the start-up current. A soft-stop function actively 

discharges the output capacitors.
       The CXSD62108 is available in 14pin TSSOP, 14pin QFN and 16pin TQFN
packages respectively.
二.产品特点(Features)
Adjustable Output Voltage from +0.75V to +5.5V
- 0.75V Reference Voltage
- ±1% Accuracy Over-Temperature
Operates from An Input Battery Voltage Range of
+1.8V to +28V
Power-On-Reset Monitoring on VCC Pin and PVCC Pin
Excellent Line and Load Transient Responses
PFM Mode for Increased Light Load Efficiency
Programmable PWM Frequency from 100kHz to 500kHz
Integrated MOSFET Drivers
Integrated Bootstrap Forward P-CH MOSFET
Adjustable Integrated Soft-Start and Soft-Stop
Selectable Forced PWM or Automatic PFM/PWM Mode
Power Good Monitoring
70% Under-Voltage Protection
125% Over-Voltage Protection
Adjustable Current-Limit Protection
- Using Sense Low-Side MOSFET’s RDS(ON)
Over-Temperature Protection
TSSOP-14, QFN3.5x3.5-14, and TQFN3x3-16 Packages
Lead Free and Green Devices Available (RoHS Compliant)
三,应用范围 (Applications)
Notebook
Table PC
Hand-Held Portable
AIO PC
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)

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六.电路原理图

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七,功能概述

Layout Consideration (Cont.)
· The signals going through theses traces have both high dv/dt and high di/dt with high peak charging and dis-
charging 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. Minimiz-
ing the impedance with wide layout plane between the two pads reduces the voltage bounce of the node. In
addition, the large layout plane between the drain of the MOSFETs (VIN and PHASE nodes) can get better heat
sinking.
· The PGND is the current sensing circuit reference ground and also the power ground of the LGATE low-
side MOSFET. On the hand, the PGND trace should be a separate trace and independently go to the source of the
low-side MOSFET. Besides, the current sense resistor should be close to OCSET pin to avoid parasitic capaci-
tor effect and noise coupling.
· Decoupling capacitors, the resistor-divider, and boot capacitor should be close to their pins. (For example, place
the decoupling ceramic capacitor close to the drain of the high-side MOSFET as close as possible.)
· The input bulk capacitors should be close to the drain of the high-side MOSFET, and the output bulk capacitors
should be close to the loads. The input capacitor’s ground should be close to the grounds of the output capacitors
and low-side MOSFET.
· Locate the resistor-divider close to the FB pin to mini-mize the high impedance trace. In addition, FB pin traces
can’t be close to the switching signal traces (UGATE, LGATE, BOOT, and PHASE).
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) 

min

max

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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