目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品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 CXSD6129 is a high-efficiency, DC-to-DC step-down switching regulators, capable of delivering up to 3A of output
current. The device operates from an input voltage range of 2.5V to 5.5V and provides an output voltage greater than 0.6V,
making the CXSD6129 ideal for low voltage power conversions.Running at a frequency of 1.4MHz allows the use of
small external components, such as ceramic input and output caps,as well as small inductors, while still providing low
output ripples. The light-load mode enhances the light loading efficiency. The low noise output along with its excellent
efficiency achieved by the internal synchronous rectifier, making CXSD6129 an ideal green replacement for large power
consuming linear regulators. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload
protection improves design reliability.
The CXSD6129 is available in ESOP8 package.
二.产品特点(Features)
High Efficiency: Up to 97%
Capable of Delivering 3A
Input Voltage: 2.5~5.5V
1.4MHz Switching Frequency
No External Schottky Diode Needed
Light-load Mode
Internal Compensation and Soft-Start
Current Mode control
0.6V Reference for Low Output voltages
Logic Control Shutdown (IQ<1uA)
Thermal shutdown and UVLO
Available in ESOP8
三,应用范围 (Applications)
Digital Cameras
MP3 and MP4 players
Set top boxes
Wireless and DSL Modems
USB supplied Devices in Notebooks
Portable Devices
四.技术规格书下载（产品PDF）
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)
|
PIN NO |
SYMBOL |
DESCRIPTTION |
|
1 |
NC |
Not Connected |
|
2 |
VIN |
Analog Supply Input |
|
3 |
SW |
Power Switch Output |
|
4 |
GND |
Ground |
|
5 |
FB |
Feedback input pin |
|
6 |
NC |
Not Connected |
|
7 |
EN |
Enable pin |
|
8 |
NC |
Not Connected |
|
(Exposed PAD) |
Ground |
|
六.电路原理图
七,功能概述
|
Parameter |
Value |
|
Max Input Voltage |
6.5V |
|
Max Operating Junction Temperature(Tj) |
125°C |
|
Maximum Power Dissipation, ESOP8 |
1.3W |
|
Storage Temperature(Ts) |
-40°C - 150°C |
|
Lead Temperature & Time |
260°C, 10S |
八,相关芯片选择指南
|
降压型DC/DC转换器(DC/DC Step-down Converter) |
|||||||
|
Part No. |
Power switching |
MODE |
VIN |
VOUT |
IQ |
FOSC |
Eff. |
|
Built-in MOSFETSynchronous |
PWM/PFM |
Max 7V |
ADJ |
35μA |
1.5MHz |
96% |
|
|
Built-in MOSFETSynchronous |
PWM/PFM |
2.6~6V |
ADJ |
40μA |
1.5MHz |
96% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
2.6~7V |
ADJ |
50μA |
1.5MHz |
97% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
2.5~6V |
ADJ |
40μA |
1.5MHz |
96% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
2.5~5.5V |
ADJ |
50μA |
1.3MHz |
97% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
2.6~6V |
ADJ |
30μA |
3MHz |
96% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
2.6~5.5V |
ADJ |
50μA |
1.4MHz |
97% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
3.5~16V |
ADJ |
0.4mA |
600KHz |
96% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
3.5~16V |
ADJ |
0.4mA |
600KHz |
96% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4.2~18V |
ADJ |
0.8mA |
500KHz |
96% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4.7~20V |
ADJ |
50μA |
500KHz |
95% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4.7~20V |
ADJ |
50μA |
500KHz |
95% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4.5~20V |
ADJ |
50μA |
410KHz |
95% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4.5~18V |
ADJ |
80μA |
420KHz |
95% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4.5~18V |
ADJ |
80μA |
420KHz |
95% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4.5~18V |
ADJ |
80μA |
420KHz |
95% |
|
|
Built-in MOSFET |
PWM/PFM |
4~24V |
ADJ |
0.6mA |
1.4MHz |
90% |
|
|
Built-in MOSFET |
PWM/PFM |
4~38V |
ADJ |
0.6mA |
660KHz |
92% |
|
|
Built-in MOSFET |
PWM/PFM |
4~38V |
ADJ |
0.6mA |
660KHz |
92% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4~40V |
ADJ |
50μA |
2MHz |
93% |
|
|
Built-in MOSFET |
PWM/PFM |
4.2~40V |
ADJ |
200μA |
1.8MHz |
90% |
|
|
Built-in MOSFET Synchronous |
PWM/PFM |
4.5~24V |
ADJ |
50μA |
500KHz |
94% |
|
|
Built-in MOSFET Synchronous |
PWM |
5~20V |
0.923~15V ADJ |
60μA |
360KHz |
94% |
|
