CXSD6297

CXSD6297内置的软启动电路可防止输出电压过冲,并限制输入电流。为了满足低输出电压应用的要求,设计了一种高精度的0.8V温度补偿参考电压CXSD6297针对负载电流变化提供了出色的输出电压调节。CXSD6297内置了参考电压偏移功能,用于需要调整电源电压的应用。

CXSD6297电压模式固定300kHz开关频率同步降压变换器上电复位(POR)电路监测VCC电源电压以防止错误的逻辑控制

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产品简介

目录wVK嘉泰姆

1.产品概述                       2.产品特点wVK嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 wVK嘉泰姆
5.产品封装图                     6.电路原理图                   wVK嘉泰姆
7.功能概述                        8.相关产品wVK嘉泰姆

一,产品概述(General Description)     wVK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 whichwVK嘉泰姆
monitors the junction temperature to prevent over-heat-ing conditions.wVK嘉泰姆
  The CXSD6297 is available in TDFN3x3-10 packagewVK嘉泰姆
二.产品特点(Features)wVK嘉泰姆


1.)Wide 5V to 12V Supply VoltagewVK嘉泰姆
2.)Power-On-Reset Monitoring on VCCwVK嘉泰姆
3.)Excellent Output Voltage RegulationswVK嘉泰姆
     - 0.8V Internal ReferencewVK嘉泰姆
     - ±1% Over Temperature Range wVK嘉泰姆
4.)Integrated Soft-StartwVK嘉泰姆
5.)Voltage Mode PWM Operation with External CompensationwVK嘉泰姆
6.)Up to 90% Duty Ratio for Fast Transient ResponsewVK嘉泰姆
7.)Constant Switching FrequencywVK嘉泰姆
    - 300kHz ±10%wVK嘉泰姆
8.)Integrated Bootstrap Forward P-CH MOSFETwVK嘉泰姆
9.)Drive Dual Low Cost N-MOSFETs with Adaptive Dead Time ControlwVK嘉泰姆
10.)50% Under-Voltage ProtectionwVK嘉泰姆
11.)125% Over-Voltage ProtectionwVK嘉泰姆
12.)Adjustable Over-Current Protection ThresholdwVK嘉泰姆
    - Using the RDS(ON) of Low-Side MOSFETwVK嘉泰姆
13.)Shutdown Control by COMPwVK嘉泰姆
14.)Power Good MonitoringwVK嘉泰姆
15.)TDFN3x3-10 PackagewVK嘉泰姆
16.)Lead Free and Green Devices Available (RoHS Compliant)wVK嘉泰姆
三,应用范围 (Applications)wVK嘉泰姆


Graphic CardswVK嘉泰姆
DSL, Switch HUBwVK嘉泰姆
Wireless LanwVK嘉泰姆
Notebook ComputerwVK嘉泰姆
Mother BoardwVK嘉泰姆
LCD Monitor/TVwVK嘉泰姆
四.下载产品资料PDF文档 wVK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wVK嘉泰姆

 QQ截图20160419174301.jpgwVK嘉泰姆

 wVK嘉泰姆

五,产品封装图 (Package)wVK嘉泰姆


blob.pngwVK嘉泰姆

六.电路原理图wVK嘉泰姆


blob.pngwVK嘉泰姆

七,功能概述wVK嘉泰姆


Layout ConsiderationwVK嘉泰姆
In any high switching frequency converter, a correct lay-out is important to ensure proper operation of thewVK嘉泰姆
regulator. With power devices switching at 300kHz,the resulting current transient will cause voltage spike acrosswVK嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionwVK嘉泰姆
of the PWM MOSFET. Before turn-off, the MOSFET is car-rying the full load current. During turn-off, current stopswVK嘉泰姆
flowing in the MOSFET and is free-wheeling by the lower MOSFET and parasitic diode. Any parasitic inductance ofwVK嘉泰姆
the circuit generates a large voltage spike during the switching interval. In general, using short and wide printedwVK嘉泰姆
circuit traces should minimize interconnecting impedwVK嘉泰姆
Layout Consideration (Cont.)wVK嘉泰姆
ances and the magnitude of voltage spike. And signal and power grounds are to be kept separate till combinedwVK嘉泰姆
using ground plane construction or single point grounding. Figure 8. illustrates the layout, with bold lineswVK嘉泰姆
indicating high current paths; these traces must be short and wide. Components along the bold lines should bewVK嘉泰姆
placed lose together. Below is a checklist for your layout:wVK嘉泰姆
- Keep the switching nodes (UGATE, LGATE, and PHASE) away from sensitive small signal nodes since thesewVK嘉泰姆
nodes are fast moving signals. Therefore, keep traces to these nodes as short as possible.wVK嘉泰姆
 The traces from the gate drivers to the MOSFETs (UG and LG) should be short and wide.wVK嘉泰姆
- Place the source of the high-side MOSFET and the drain of the low-side MOSFET as close as possible. Minimiz-wVK嘉泰姆
ing the impedance with wide layout plane between the two pads reduces the voltage bounce of the node.wVK嘉泰姆
 Decoupling capacitor, compensation component, the resistor dividers, and boot capacitors should be closewVK嘉泰姆
their pins. (For example, place the decoupling ceramic capacitor near the drain of the high-side MOSFET aswVK嘉泰姆
close as possible. The bulk capacitors are also placed near the drain).wVK嘉泰姆
- The input capacitor should be near the drain of the up-per MOSFET; the output capacitor should be near thewVK嘉泰姆
loads. The input capacitor GND should be close to the output capacitor GND and the lower MOSFET GND.wVK嘉泰姆
- The drain of the MOSFETs (VIN and PHASE nodes) should be a large plane for heat sinking.wVK嘉泰姆
The ROCSET resistance should be placed near the IC as close as possible.wVK嘉泰姆

八,相关产品                更多同类产品...... wVK嘉泰姆


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tectuwVK嘉泰姆

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(A) wVK嘉泰姆

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(V) wVK嘉泰姆

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1   wVK嘉泰姆

1     wVK嘉泰姆

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2.9    wVK嘉泰姆

13.2wVK嘉泰姆

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0.6|0.8wVK嘉泰姆

5~12wVK嘉泰姆

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2000wVK嘉泰姆

CXSD62102wVK嘉泰姆

TQFN3x3-16wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

1wVK嘉泰姆

30wVK嘉泰姆

1.8wVK嘉泰姆

28wVK嘉泰姆

0.6wVK嘉泰姆

5wVK嘉泰姆

600wVK嘉泰姆

CXSD62102AwVK嘉泰姆

TQFN 3x3 16wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

1wVK嘉泰姆

30wVK嘉泰姆

1.8wVK嘉泰姆

28wVK嘉泰姆

0.6wVK嘉泰姆

5wVK嘉泰姆

600wVK嘉泰姆

CXSD62103wVK嘉泰姆

QFN4x4-24wVK嘉泰姆

VMwVK嘉泰姆

2wVK嘉泰姆

1wVK嘉泰姆

50wVK嘉泰姆

4.5wVK嘉泰姆

13.2wVK嘉泰姆

0.6wVK嘉泰姆

5~12wVK嘉泰姆

5000wVK嘉泰姆

CXSD62104wVK嘉泰姆

TQFN4x4-24wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

15wVK嘉泰姆

6wVK嘉泰姆

25wVK嘉泰姆

2wVK嘉泰姆

NwVK嘉泰姆

550wVK嘉泰姆

CXSD62105wVK嘉泰姆

TQFN4x4-24wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

15wVK嘉泰姆

6wVK嘉泰姆

25wVK嘉泰姆

2wVK嘉泰姆

NwVK嘉泰姆

550wVK嘉泰姆

CXSD62106|AwVK嘉泰姆

TQFN4x4-4wVK嘉泰姆

TQFN3x3-20wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

20wVK嘉泰姆

3wVK嘉泰姆

28wVK嘉泰姆

0.75wVK嘉泰姆

5wVK嘉泰姆

800wVK嘉泰姆

CXSD62107wVK嘉泰姆

TQFN3x3-16wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

1wVK嘉泰姆

20wVK嘉泰姆

1.8wVK嘉泰姆

28wVK嘉泰姆

0.75wVK嘉泰姆

5wVK嘉泰姆

400wVK嘉泰姆

CXSD62108wVK嘉泰姆

QFN3.5x3.5-14wVK嘉泰姆

TQFN3x3-16wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

1wVK嘉泰姆

20wVK嘉泰姆

1.8wVK嘉泰姆

28wVK嘉泰姆

0.75wVK嘉泰姆

5wVK嘉泰姆

400wVK嘉泰姆

CXSD62109wVK嘉泰姆

TQFN3x3-16wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

20wVK嘉泰姆

1.8wVK嘉泰姆

28wVK嘉泰姆

0.75wVK嘉泰姆

5wVK嘉泰姆

400wVK嘉泰姆

CXSD62110wVK嘉泰姆

QFN3x3-20wVK嘉泰姆

TQFN3x3-16wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

20wVK嘉泰姆

3wVK嘉泰姆

28wVK嘉泰姆

1.8|1.5|0.5wVK嘉泰姆

5wVK嘉泰姆

740wVK嘉泰姆

CXSD62111wVK嘉泰姆

TQFN4x4-24wVK嘉泰姆

|QFN3x3-20wVK嘉泰姆

CMwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

15wVK嘉泰姆

5wVK嘉泰姆

28wVK嘉泰姆

0.5wVK嘉泰姆

NwVK嘉泰姆

3000wVK嘉泰姆

CXSD62112wVK嘉泰姆

TDFN3x3-10wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

1wVK嘉泰姆

20wVK嘉泰姆

1.8wVK嘉泰姆

28wVK嘉泰姆

0.5wVK嘉泰姆

5wVK嘉泰姆

250wVK嘉泰姆

CXSD62113|CwVK嘉泰姆

TQFN3x3-20wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

15wVK嘉泰姆

6wVK嘉泰姆

25wVK嘉泰姆

2wVK嘉泰姆

NwVK嘉泰姆

550wVK嘉泰姆

CXSD62113EwVK嘉泰姆

TQFN 3x3 20wVK嘉泰姆

COTwVK嘉泰姆

2wVK嘉泰姆

2wVK嘉泰姆

11wVK嘉泰姆

6wVK嘉泰姆

25wVK嘉泰姆

2wVK嘉泰姆

NwVK嘉泰姆

550wVK嘉泰姆

CXSD62114wVK嘉泰姆

TQFN3x3-20wVK嘉泰姆

COTwVK嘉泰姆

2wVK嘉泰姆

2wVK嘉泰姆

11wVK嘉泰姆

5.5wVK嘉泰姆

25wVK嘉泰姆

2wVK嘉泰姆

NwVK嘉泰姆

280wVK嘉泰姆

CXSD62115wVK嘉泰姆

QFN4x4-24wVK嘉泰姆

VMwVK嘉泰姆

2wVK嘉泰姆

1wVK嘉泰姆

60wVK嘉泰姆

3.1wVK嘉泰姆

13.2wVK嘉泰姆

0.85wVK嘉泰姆

12wVK嘉泰姆

5000wVK嘉泰姆

CXSD62116A|B|CwVK嘉泰姆

SOP-8PwVK嘉泰姆

VMwVK嘉泰姆

1wVK嘉泰姆

1wVK嘉泰姆

20wVK嘉泰姆

2.9wVK嘉泰姆

13.2wVK嘉泰姆

0.8wVK嘉泰姆

12wVK嘉泰姆

16000wVK嘉泰姆

CXSD62117wVK嘉泰姆

SOP-20wVK嘉泰姆

VMwVK嘉泰姆

2wVK嘉泰姆

2wVK嘉泰姆

30wVK嘉泰姆

10wVK嘉泰姆

13.2wVK嘉泰姆

1wVK嘉泰姆

12wVK嘉泰姆

5000wVK嘉泰姆

CXSD62118wVK嘉泰姆

TDFN3x3-10wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

1wVK嘉泰姆

25wVK嘉泰姆

1.8wVK嘉泰姆

28wVK嘉泰姆

0.7wVK嘉泰姆

5wVK嘉泰姆

250wVK嘉泰姆

CXSD62119wVK嘉泰姆

TQFN3x3-20wVK嘉泰姆

COTwVK嘉泰姆

2wVK嘉泰姆

1wVK嘉泰姆

40wVK嘉泰姆

1.8wVK嘉泰姆

25wVK嘉泰姆

REFIN SettingwVK嘉泰姆

5wVK嘉泰姆

700wVK嘉泰姆

CXSD62120wVK嘉泰姆

QFN 3x3 20wVK嘉泰姆

TQFN 3x3 16wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

20wVK嘉泰姆

3wVK嘉泰姆

28wVK嘉泰姆

1.8|1.5 1.35|1.2 0.5wVK嘉泰姆

5wVK嘉泰姆

800wVK嘉泰姆

CXSD62121AwVK嘉泰姆

TQFN3x3 20wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

15wVK嘉泰姆

3wVK嘉泰姆

28wVK嘉泰姆

0.75wVK嘉泰姆

5wVK嘉泰姆

220wVK嘉泰姆

CXSD62121BwVK嘉泰姆

TQFN3x3 20wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

15wVK嘉泰姆

3wVK嘉泰姆

28wVK嘉泰姆

0.75wVK嘉泰姆

5wVK嘉泰姆

220wVK嘉泰姆

CXSD62121wVK嘉泰姆

TQFN3x3-20wVK嘉泰姆

COTwVK嘉泰姆

1wVK嘉泰姆

2wVK嘉泰姆

20wVK嘉泰姆

3wVK嘉泰姆

28wVK嘉泰姆

0.75wVK嘉泰姆

5wVK嘉泰姆

180wVK嘉泰姆

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