CXSD6297 is a voltage mode, fixed 300kHz switching frequency, synchronous buck converter. CXSD6297 allows wide input voltage that is either a single 5V~12V or two supply voltage(s) for various

发布时间:2020-04-06 09:43:38 浏览次数:710 作者:嘉泰姆 来源:1
摘要:CXSD6297 is a voltage mode, fixed 300kHz switching frequency, synchronous buck converter. CXSD6297 allows wide input voltage that is either a single 5V~12V or two supply voltage(s) for various

目录dc1嘉泰姆

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</span>                     6.电路原理图</span>                   
7.
功能概述
                        8.相关产品dc1嘉泰姆

,产品概述(General Description)     dc1嘉泰姆


  The CXSD6297 is a voltage mode, fixed 300kHz switching frequency, synchronous buck converter. The CXSD6297 allows wide input voltage that is either a single 5V~12V or two supply voltage(s) for various applications. The power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. A built-in soft-start circuit prevents the output voltages from overshoot as well as limits the input current. An internal 0.8V tempera-ture-compensated reference voltage with high accuracy is designed to meet the requirement of low output volt-age applications. The CXSD6297 provides excellent out-put voltage regulations against load current variation.CXSD6297 is built in reference voltage offset function for applications that require adjusting supply voltage.The controller’s over-current protection monitors the out-put current by using the voltage drop across the RDS(ON) of low-side MOSFET, eliminating the need for a current sens-ing resistor that features high efficiency and low cost. In addition, the CXSD6297 also integrates excellent protec-tion functions, The over-voltage protection (OVP) , under-voltage protection (UVP) and over-temperature protec-tion (OTP). OVP circuit which monitors the FB voltage to prevent the PWM output from over voltage, and UVP cir-cuit which monitors the FB voltage to prevent the PWM output from under voltage or short circuit. OTP circuit which
monitors the junction temperature to prevent over-heat-ing conditions.
  The CXSD6297 is available in TDFN3x3-10 package

二</span>.产品特点(Features)dc1嘉泰姆


1.)Wide 5V to 12V Supply Voltage
2.)Power-On-Reset Monitoring on VCC
3.)Excellent Output Voltage Regulations
     - 0.8V Internal Reference
     - ±1% Over Temperature Range 

4.)Integrated Soft-Start
5.)Voltage Mode PWM Operation with External Compensation
6.)Up to 90% Duty Ratio for Fast Transient Response
7.)Constant Switching Frequency
    - 300kHz ±10%

8.)Integrated Bootstrap Forward P-CH MOSFET
9.)Drive Dual Low Cost N-MOSFETs with Adaptive Dead Time Control
10.)50% Under-Voltage Protection
11.)125% Over-Voltage Protection
12.)Adjustable Over-Current Protection Threshold
    - Using the RDS(ON) of Low-Side MOSFET

13.)Shutdown Control by COMP
14.)Power Good Monitoring
15.)TDFN3x3-10 Package
16.)Lead Free and Green Devices Available (RoHS Compliant)
三</span>,应用范围 (Applications)dc1嘉泰姆


Graphic Cards
DSL, Switch HUB
Wireless Lan
Notebook Computer
Mother Board

LCD Monitor/TV
四.下载产品资料PDF文档 dc1嘉泰姆


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</span>!</span>dc1嘉泰姆

 QQ截图20160419174301.jpgdc1嘉泰姆

dc1嘉泰姆

五,产品封装图 (Package)dc1嘉泰姆


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六.电路原理图</span>dc1嘉泰姆


blob.pngdc1嘉泰姆

七</span>,功能概述dc1嘉泰姆


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.dc1嘉泰姆

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TQFN3x3-16dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

1dc1嘉泰姆

20dc1嘉泰姆

1.8dc1嘉泰姆

28dc1嘉泰姆

0.75dc1嘉泰姆

5dc1嘉泰姆

400dc1嘉泰姆

CXSD62109dc1嘉泰姆

TQFN3x3-16dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

2dc1嘉泰姆

20dc1嘉泰姆

1.8dc1嘉泰姆

28dc1嘉泰姆

0.75dc1嘉泰姆

5dc1嘉泰姆

400dc1嘉泰姆

CXSD62110dc1嘉泰姆

QFN3x3-20dc1嘉泰姆

TQFN3x3-16dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

2dc1嘉泰姆

20dc1嘉泰姆

3dc1嘉泰姆

28dc1嘉泰姆

1.8|1.5|0.5dc1嘉泰姆

5dc1嘉泰姆

740dc1嘉泰姆

CXSD62111dc1嘉泰姆

TQFN4x4-24dc1嘉泰姆

|QFN3x3-20dc1嘉泰姆

CMdc1嘉泰姆

1dc1嘉泰姆

2dc1嘉泰姆

15dc1嘉泰姆

5dc1嘉泰姆

28dc1嘉泰姆

0.5dc1嘉泰姆

Ndc1嘉泰姆

3000dc1嘉泰姆

CXSD62112dc1嘉泰姆

TDFN3x3-10dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

1dc1嘉泰姆

20dc1嘉泰姆

1.8dc1嘉泰姆

28dc1嘉泰姆

0.5dc1嘉泰姆

5dc1嘉泰姆

250dc1嘉泰姆

CXSD62113|Cdc1嘉泰姆

TQFN3x3-20dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

2dc1嘉泰姆

15dc1嘉泰姆

6dc1嘉泰姆

25dc1嘉泰姆

2dc1嘉泰姆

Ndc1嘉泰姆

550dc1嘉泰姆

CXSD62113Edc1嘉泰姆

TQFN 3x3 20dc1嘉泰姆

COTdc1嘉泰姆

2dc1嘉泰姆

2dc1嘉泰姆

11dc1嘉泰姆

6dc1嘉泰姆

25dc1嘉泰姆

2dc1嘉泰姆

Ndc1嘉泰姆

550dc1嘉泰姆

CXSD62114dc1嘉泰姆

TQFN3x3-20dc1嘉泰姆

COTdc1嘉泰姆

2dc1嘉泰姆

2dc1嘉泰姆

11dc1嘉泰姆

5.5dc1嘉泰姆

25dc1嘉泰姆

2dc1嘉泰姆

Ndc1嘉泰姆

280dc1嘉泰姆

CXSD62115dc1嘉泰姆

QFN4x4-24dc1嘉泰姆

VMdc1嘉泰姆

2dc1嘉泰姆

1dc1嘉泰姆

60dc1嘉泰姆

3.1dc1嘉泰姆

13.2dc1嘉泰姆

0.85dc1嘉泰姆

12dc1嘉泰姆

5000dc1嘉泰姆

CXSD62116A|B|Cdc1嘉泰姆

SOP-8Pdc1嘉泰姆

VMdc1嘉泰姆

1dc1嘉泰姆

1dc1嘉泰姆

20dc1嘉泰姆

2.9dc1嘉泰姆

13.2dc1嘉泰姆

0.8dc1嘉泰姆

12dc1嘉泰姆

16000dc1嘉泰姆

CXSD62117dc1嘉泰姆

SOP-20dc1嘉泰姆

VMdc1嘉泰姆

2dc1嘉泰姆

2dc1嘉泰姆

30dc1嘉泰姆

10dc1嘉泰姆

13.2dc1嘉泰姆

1dc1嘉泰姆

12dc1嘉泰姆

5000dc1嘉泰姆

CXSD62118dc1嘉泰姆

TDFN3x3-10dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

1dc1嘉泰姆

25dc1嘉泰姆

1.8dc1嘉泰姆

28dc1嘉泰姆

0.7dc1嘉泰姆

5dc1嘉泰姆

250dc1嘉泰姆

CXSD62119dc1嘉泰姆

TQFN3x3-20dc1嘉泰姆

COTdc1嘉泰姆

2dc1嘉泰姆

1dc1嘉泰姆

40dc1嘉泰姆

1.8dc1嘉泰姆

25dc1嘉泰姆

REFIN Settingdc1嘉泰姆

5dc1嘉泰姆

700dc1嘉泰姆

CXSD62120dc1嘉泰姆

QFN 3x3 20dc1嘉泰姆

TQFN 3x3 16dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

2dc1嘉泰姆

20dc1嘉泰姆

3dc1嘉泰姆

28dc1嘉泰姆

1.8|1.5 1.35|1.2 0.5dc1嘉泰姆

5dc1嘉泰姆

800dc1嘉泰姆

CXSD62121Adc1嘉泰姆

TQFN3x3 20dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

2dc1嘉泰姆

15dc1嘉泰姆

3dc1嘉泰姆

28dc1嘉泰姆

0.75dc1嘉泰姆

5dc1嘉泰姆

220dc1嘉泰姆

CXSD62121Bdc1嘉泰姆

TQFN3x3 20dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

2dc1嘉泰姆

15dc1嘉泰姆

3dc1嘉泰姆

28dc1嘉泰姆

0.75dc1嘉泰姆

5dc1嘉泰姆

220dc1嘉泰姆

CXSD62121dc1嘉泰姆

TQFN3x3-20dc1嘉泰姆

COTdc1嘉泰姆

1dc1嘉泰姆

2dc1嘉泰姆

20dc1嘉泰姆

3dc1嘉泰姆

28dc1嘉泰姆

0.75dc1嘉泰姆

5dc1嘉泰姆

180dc1嘉泰姆


dc1嘉泰姆

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