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首页 > Products > Power Management > DC/DC Step-Down Converter > Buck Step-Down Converter >CXSD62116A/B/C is a voltage mode, fixed 300kHz-switching frequency, and synchronous buck controller. allows wide input voltage that is either a single 5~12V or two supply voltage(s)
CXSD62116A/B/C is a voltage mode, fixed 300kHz-switching frequency, and synchronous buck controller. allows wide input voltage that is either a single 5~12V or two supply voltage(s)

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.

CXSD62116A/B/C is a voltage mode, fixed 300kHz-switching frequency, and synchronous buck controller.  allows wide input voltage that is either a single 5~12V or two supply voltage(s)
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目录x3R嘉泰姆

1.产品概述                       2.产品特点x3R嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 x3R嘉泰姆
5.产品封装图                     6.电路原理图                   x3R嘉泰姆
7.功能概述                        8.相关产品x3R嘉泰姆

一,产品概述(General Description)         x3R嘉泰姆
        The CXSD62116A/B/C is a voltage mode, fixed 300kHz-switching frequency,x3R嘉泰姆
and synchronous buck controller. The CXSD62116A/B/C allows wide input voltagex3R嘉泰姆
that is either a single 5~12V or two supply voltage(s) for various applications.x3R嘉泰姆
A power-on-reset (POR) circuit monitors the VCC supply voltage to preventx3R嘉泰姆
wrong logic controls. A built-in digital soft-start circuit prevents the outputx3R嘉泰姆
voltages from overshoot as well as limits the input current. An internalx3R嘉泰姆
0.6V temperature-compensated reference voltage with high accuracy isx3R嘉泰姆
designed to meet the requirement of low output voltage applications.x3R嘉泰姆
The CXSD62116A/B/C provides excellent output voltage regulations againstx3R嘉泰姆
load current variation.x3R嘉泰姆
     The controller’s over-current protection monitors the output currentx3R嘉泰姆
by using the voltage drops across the RDS(ON)of low-side MOSFET,x3R嘉泰姆
eliminating the need for a current sensing resistor that features highx3R嘉泰姆
efficiency and low cost.x3R嘉泰姆
     The CXSD62116A/B/C also integrates over-voltage protection (OVP) andx3R嘉泰姆
under-voltage protection circuit which moni-tors the FB voltage to preventx3R嘉泰姆
the PWM output from over and under voltage.x3R嘉泰姆
     The CXSD62116A/B/C is available in a simple SOP-8P package.x3R嘉泰姆
二.产品特点(Features)x3R嘉泰姆
Wide Operation Supply Voltage from 5V to 12Vx3R嘉泰姆
Power-On-Reset Monitoring on VCC x3R嘉泰姆
Excellent Reference Voltage Regulationsx3R嘉泰姆
- 0.6V Internal Referencex3R嘉泰姆
- ±1% Over Temperature Rangex3R嘉泰姆
Integrated Soft-Startx3R嘉泰姆
Automatic PSM/PWM Modesx3R嘉泰姆
Voltage Mode PWM Operation with 90% (Max.) Duty Cyclex3R嘉泰姆
Under-Voltage Protectionx3R嘉泰姆
Adjustable Over-Current Protection Thresholdx3R嘉泰姆
- Sensing the RDS(ON) of Low-Side MOSFETx3R嘉泰姆
Over-Voltage Protectionx3R嘉泰姆
Under-Voltage Protectionx3R嘉泰姆
Simple SOP-8P Packagex3R嘉泰姆
Lead Free and Green Devices Availablex3R嘉泰姆
(RoHS Compliant)x3R嘉泰姆
三,应用范围 (Applications)x3R嘉泰姆
Graphic Cardsx3R嘉泰姆
DSL, Switch HUBx3R嘉泰姆
Wireless Lanx3R嘉泰姆
Notebook Computerx3R嘉泰姆
Mother Boardx3R嘉泰姆
LCD Monitor/TVx3R嘉泰姆

四.下载产品资料PDF文档 x3R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x3R嘉泰姆

 QQ截图20160419174301.jpgx3R嘉泰姆

五,产品封装图 (Package)x3R嘉泰姆
x3R嘉泰姆
六.电路原理图x3R嘉泰姆

blob.pngx3R嘉泰姆
七,功能概述x3R嘉泰姆
Layout Considerationx3R嘉泰姆
In any high switching frequency converter, a correct lay-out is important to ensure proper operation of thex3R嘉泰姆
regulator. With power devices switching at 300kHz,the resulting current transient will cause voltage spike acrossx3R嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionx3R嘉泰姆
of the PWM MOSFET. Before turn-off, the MOSFET is car rying the full load current. During turn-off, current stopsx3R嘉泰姆
flowing in the MOSFET and is free-wheeling by the lower MOSFET and parasitic diode. Any parasitic inductance ofx3R嘉泰姆
the circuit generates a large voltage spike during the switching interval. In general, using short and wide printedx3R嘉泰姆
circuit traces should minimize interconnecting imped-x3R嘉泰姆

Layout Consideration (Cont.)x3R嘉泰姆
ances and the magnitude of voltage spike. And signal and power grounds are to be kept separate till combinedx3R嘉泰姆

using ground plane construction or single point grounding. Figure 8. illustrates the layout, with bold linesx3R嘉泰姆
indicating high current paths; these traces must be short and wide. Components along the bold lines should bex3R嘉泰姆

placed lose together. Below is a checklist for your layout:x3R嘉泰姆

- Keep the switching nodes (UGATE, LGATE, and PHASE) away from sensitive small signal nodes since thesex3R嘉泰姆

nodes are fast moving signals. Therefore, keep traces to these nodes as short as possible.x3R嘉泰姆

- The traces from the gate drivers to the MOSFETs (UG and LG) should be short and wide.x3R嘉泰姆

- Place the source of the high-side MOSFET and the drain of the low-side MOSFET as close as possible. Minimiz-x3R嘉泰姆
ing the impedance with wide layout plane between the two pads reduces the voltage bounce of the node.x3R嘉泰姆
- Decoupling capacitor, compensation component, the resistor dividers, and boot capacitors should be closex3R嘉泰姆
their pins. (For example, place the decoupling ceramic capacitor near the drain of the high-side MOSFET asx3R嘉泰姆
close as possible. The bulk capacitors are also placed near the drain).x3R嘉泰姆
- The input capacitor should be near the drain of the up-per MOSFET; the output capacitor should be near thex3R嘉泰姆
loads. The input capacitor GND should be close to the output capacitor GND and the lower MOSFET GND.x3R嘉泰姆
- The drain of the MOSFETs (VIN and PHASE nodes) should be a large plane for heat sinking.x3R嘉泰姆
- The ROCSET resistance should be placed near the IC as close as possible.Close to ICx3R嘉泰姆
Figure 8. Layout Guidelinesx3R嘉泰姆

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