CXSD62116A|B|C电压模式固定300kHz开关频率和同步降压控制器两个电源电压模式

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 CXSD62116A/B/C is a voltage mode, fixed 300kHz-switching frequency,
and synchronous buck controller. The CXSD62116A/B/C allows wide input voltage
that is either a single 5~12V or two supply voltage(s) for various applications.
A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent
wrong logic controls. A built-in digital soft-start circuit prevents the output
voltages from overshoot as well as limits the input current. An internal
0.6V temperature-compensated reference voltage with high accuracy is
designed to meet the requirement of low output voltage applications.
The CXSD62116A/B/C provides excellent output voltage regulations against
load current variation.
     The controller’s over-current protection monitors the output current
by using the voltage drops across the RDS(ON)of low-side MOSFET,
eliminating the need for a current sensing resistor that features high
efficiency and low cost.
     The CXSD62116A/B/C also integrates over-voltage protection (OVP) and
under-voltage protection circuit which moni-tors the FB voltage to prevent
the PWM output from over and under voltage.
     The CXSD62116A/B/C is available in a simple SOP-8P package.
二.产品特点(Features)
Wide Operation Supply Voltage from 5V to 12V
Power-On-Reset Monitoring on VCC 
Excellent Reference Voltage Regulations
- 0.6V Internal Reference
- ±1% Over Temperature Range
Integrated Soft-Start
Automatic PSM/PWM Modes
Voltage Mode PWM Operation with 90% (Max.) Duty Cycle
Under-Voltage Protection
Adjustable Over-Current Protection Threshold
- Sensing the RDS(ON) of Low-Side MOSFET
Over-Voltage Protection
Under-Voltage Protection
Simple SOP-8P Package
Lead Free and Green Devices Available
(RoHS Compliant)
三,应用范围 (Applications)
Graphic Cards
DSL, Switch HUB
Wireless Lan
Notebook Computer
Mother Board
LCD Monitor/TV

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！

五,产品封装图 (Package)

六.电路原理图

七,功能概述
Layout Consideration
In any high switching frequency converter, a correct lay-out is important to ensure proper operation of the
regulator. With power devices switching at 300kHz,the resulting current transient will cause voltage spike across
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transition
of the PWM MOSFET. Before turn-off, the MOSFET is car rying the full load current. During turn-off, current stops
flowing in the MOSFET and is free-wheeling by the lower MOSFET and parasitic diode. Any parasitic inductance of
the circuit generates a large voltage spike during the switching interval. In general, using short and wide printed
circuit traces should minimize interconnecting imped-

Layout Consideration (Cont.)
ances and the magnitude of voltage spike. And signal and power grounds are to be kept separate till combined

using ground plane construction or single point grounding. Figure 8. illustrates the layout, with bold lines
indicating high current paths; these traces must be short and wide. Components along the bold lines should be

placed lose together. Below is a checklist for your layout:

- Keep the switching nodes (UGATE, LGATE, and PHASE) away from sensitive small signal nodes since these

nodes are fast moving signals. Therefore, keep traces to these nodes as short as possible.

- The traces from the gate drivers to the MOSFETs (UG and LG) 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.
- Decoupling capacitor, compensation component, the resistor dividers, and boot capacitors should be close
their pins. (For example, place the decoupling ceramic capacitor near the drain of the high-side MOSFET as
close as possible. The bulk capacitors are also placed near the drain).
- The input capacitor should be near the drain of the up-per MOSFET; the output capacitor should be near the
loads. 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.
- The ROCSET resistance should be placed near the IC as close as possible.Close to IC
Figure 8. Layout Guidelines

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