The CXMD3256 is a voltage mode, fixed 200kHz/300kHz/600kHz switching frequency,synchronous buck converter. The CXSD6296 allows wide input voltage that is either a single 5~1 2V or two supply voltage(s) for various applications. A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. Abuilt- in soft-start circuit prevents the output voltages from over- shoot as well as limits the input current. An internal 0.6V/0.8V Temperature-compensated reference voltage with high accuracy is designed to meet the requirement of low out- put voltage applications
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[ CXMD3256 ]"
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产品概述 返回TOP
The CXMD3256 is a voltage mode, fixed 200kHz/300kHz/600kHz switching frequency,synchronous buck converter. The CXSD6296 allows wide input voltage that is either a single 5~1 2V or two supply voltage(s) for various applications. A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. Abuilt- in soft-start circuit prevents the output voltages from over- shoot as well as limits the input current. An internal 0.6V/0.8V Temperature-compensated reference voltage with high accuracy is designed to meet the requirement of low out- put voltage applications. The CXSD6296 provides excel- lent output voltage regulations against load current variation. 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 cur- rent sensing resistor that features high efficiency and low cost. In addition, the CXMD3256 also integrates excel- lent protection functions. The over-voltage protection (OVP), under-voltage protection (UVP). OVP circuit which monitors the FB voltage to prevent the PWM output from over voltage, and UVP circuit which monitors the FB voltage to prevent the PWM output from under voltage or short circuit.The CXMD3256 is available in SOP-8P packages
产品特点 返回TOP
Wide 5V to 12V Supply Voltage
Power-On-Reset Monitoring on VCC
Excellent Output Voltage Regulations
0.6V Internal Reference for CXMD3256/A/D
0.8V Internal Reference for CXMD3256B/C
±0.6% Over-Temperature Range
Integrated Soft-Start
Voltage Mode PWM Operation with External Compensation
Up to 90%DutyRatio for Fast Transient Response
Constant Switching Frequency
300kHz ±10% for CXMD3256/B
200kHz ±10% for CXMD3256C
600kHz ±10% for CXMD3256A/D
Integrated Bootstrap Forward P-CH MOSFET
50%Under-Voltage Protection
125%Over-Voltage Protection
Adjustable Over-Current Protection Threshold
Using the RDS(ON) of Low-Side MOSFET
Shutdown Control byCOMP
SOP-8P Package
Lead Free and Green Devices Available
应用范围 返回TOP
Graphic Cards
DSL, Switch HUB
Wireless Lan
Notebook Computer
Mother Board
LCD Monitor/TV
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产品封装图 返回TOP
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PWM Controller(脉宽调制控制器) |
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Part No. |
Input Voltage |
Output Voltage |
Frequency |
Efficiency |
Package |
precision |
Over |
Over |
Short Protection |
Current |
Temperature |
||||||||
Protection |
Protection |
||||||||
16V |
ADJ |
300KHZ |
93% |
SOP8/DFN3*3-10DFN3*3-10 |
2% |
Y |
Y |
Y |
|
16V |
ADJ |
200KHz/300KHZ /600KHz |
93% |
SOP8 DFN3*3-10 |
2% |
Y |
Y |
Y |
|
35V |
ADJ |
290-430KHz |
93% |
DFN3*3-10 |
2% |
Y |
Y |
Y |
|
35V |
ADJ |
290-430KHz |
93% |
DFN3*3-10 |
2% |
Y |
Y |
Y |
|
35V |
ADJ |
135-215KHz |
93% |
DFN3*3-10 |
2% |
Y |
Y |
Y |
|
35V |
ADJ |
135-215KHz |
93% |
DFN3*3-10 |
2% |
Y |
Y |
Y |
|
40V |
- |
100-300KHz |
- |
QFN20 |
Y |
Y |
Y |