目录
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 6.电路原理图
7.功能概述 8.相关产品
一,产品概述(General Description)
The CXSD61055A is a synchronous step-down DC/DC converter that
provides wide 4.5V to 21V input voltage range and 2A continuous load current capability.
The CXSD61055A fault protection includes cycle-by-cycle current limit,
UVLO, output overvoltage protection and thermal shutdown. The adjustable
soft-start function prevents inrush current at turn-on. This device uses current
mode control scheme which provides fast transient response. Internal compensation function reduces external compensation
components and simplifies the design process. In shutdown mode, the supply
current is less than 1μA.
The CXSD61055A is available in SOT-23-6 package and provides good thermal conductance.
二.产品特点(Features)
High Efficiency up to 94%
Low RDS(ON) Integrated Power MOSFET
Internal Compensation Function
Wide Input Voltage Range: 4.5V to 21V
Adjustable Output Voltage from 0.8V to 17.85V
2A Output Current
Fixed 600KHz Switching Frequency
Current Mode Operation
Cycle-by-Cycle Current Limit
Over-Temperature Protection with Auto Recovery
Output Overvoltage Protection
Under Voltage Lockout
<1μA Shutdown Current
SOT-23-6 Package
三,应用范围 (Applications)
STB (Set-Top-Box)
LCD Display, TV
Distributed Power System
Networking, XDSL Modem
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)
|
I/O |
Pin Name |
Pin No. |
Pin Function |
|
I |
FB |
3 |
Voltage Feedback Input Pin. Connect FB and VOUT with a resistive voltage divider. This IC |
|
I |
VIN |
5 |
Power Supply Input Pin. Drive VIN pin by 4.5V to 21V voltage to power on the chip. |
|
I |
4 |
Enable Input Pin. This pin is a digital control input which turns the converter on or off. Connect to |
|
|
I |
GND |
2 |
Ground Pin. |
|
O |
LX |
6 |
Power Switching Output. LX is the output of the internal high side NMOS switch. |
|
O |
BST |
1 |
High Side Gate Drive Boost Pin. A capacitor rating between 10nF~100nF must be connected from |
六.电路原理图
|
VOUT |
C1 |
R1 |
R2 |
C9 |
C4 |
L1 |
C2 |
|
1.2V |
10μF MLCC x2 |
4.99kΩ |
10kΩ |
-- |
200pF~1nF |
2.2μH |
22μF MLCC x2 |
|
1.8V |
10μF MLCC x2 |
4.99kΩ |
3.92kΩ |
-- |
200pF~1nF |
2.2μH |
22μF MLCC x2 |
|
2.5V |
10μF MLCC x2 |
4.99kΩ |
2.32kΩ |
-- |
200pF~1nF |
4.7μH |
22μF MLCC x2 |
|
3.3V |
10μF MLCC x2 |
30.9kΩ |
9.76kΩ |
-- |
200pF~1nF |
4.7μH |
22μF MLCC x2 |
|
5V |
10μF MLCC x2 |
30.9kΩ |
5.76kΩ |
-- |
200pF~1nF |
4.7μH |
22μF MLCC x2 |
|
1.2V |
100μF EC x1 |
4.99kΩ |
10kΩ |
0.1μF |
-- |
2.2μH |
100μF EC x1 |
|
1.8V |
100μF EC x1 |
4.99kΩ |
3.92kΩ |
0.1μF |
-- |
2.2μH |
100μF EC x1 |
|
2.5V |
100μF EC x1 |
4.99kΩ |
2.32kΩ |
0.1μF |
-- |
4.7μH |
100μF EC x1 |
|
3.3V |
100μF EC x1 |
30.9kΩ |
9.76kΩ |
0.1μF |
-- |
4.7μH |
100μF EC x1 |
|
5V |
100μF EC x1 |
30.9kΩ |
5.76kΩ |
0.1μF |
-- |
4.7μH |
100μF EC x1 |
七,功能概述
Absolute Maximum Ratings (Note 1)
● Supply Voltage VIN ----------------------------------------------------------------------------- -0.3V to +23V
● Enable Voltage SH------------------------------------------------------------------------ -0.3V to +23V
● LX Voltage VLX (50ns) ---------------------------------------------------------------------- -1V to VIN+0.3V
● BST Pin Voltage VBST ----------------------------------------------------------------------- VLX-0.3V to VLX+6V
● All Other Pins Voltage -------------------------------------------------------------------------- -0.3V to +6V
● Maximum Junction Temperature (TJ) ---------------------------------------------------- +150°C
● Storage Temperature (TS) -------------------------------------------------------------------- -65°C to +150°C
● Lead Temperature (Soldering, 10sec.) --------------------------------------------------- +260°C
● Package Thermal Resistance, (θJA) SOT-23-6 ------------------------------------------------ +250°C/W
● Package Thermal Resistance, (θJC) SOT-23-6 ---------------------------------------------------- +110°C/W
八,相关芯片选择指南 更多同类产品......
|
高压同步DC-DC降压IC |
|||||||||
|
型号 |
输入耐压 |
输出电压 |
输出电流 |
反馈电压 |
工作频率 |
静态工 作电流 |
待机电流 |
封装 |
|
|
8V-35V |
可调输出 带线损补偿 |
2A/带可调恒流设置 |
1.21V |
130K |
95% |
1.3mA |
112uA |
SOP-8 |
|
|
8V-35V |
可调输出/带线损 补偿带使能端 |
2A/带可调恒流设置 |
1.21V |
130K |
93% |
1.3mA |
SOP-8 |
||
|
4.5-20V |
可调输出 |
2.0A |
0.923V |
340K |
95% |
1mA |
6uA |
SOP-8 |
|
|
CXSD61046A/B |
4.5-27V |
可调输出 |
2.0A/2.5A |
0.925V |
340K |
96% |
1.3mA |
0.3uA |
SOP-8 |
|
8V--35V |
可调输出 带线损补偿 |
2.0A/带可调限流保护 |
1.2V |
100-500K |
93% |
750uA |
110uA |
ESOP-8 |
|
|
CXSD61048A |
10V--35V |
可调输出 带线损补偿 |
2.5A/带可调限流保护 |
1.2V |
100-500K可调 |
93% |
15mA |
110uA |
SOP-8 |
|
CXSD61048B |
8V-35V |
可调输出 带线损补偿 |
2.8A/带可调限流保护 |
1.21V |
100-500K可调 |
93% |
15mA |
110uA |
SOP-8 |
|
CXSD61048C |
8V-35V |
可调输出 带线损补偿 |
3.2A/带可调限流保护 |
1.21V |
100-500K可调 |
93% |
15mA |
110uA |
SOP-8 |
|
4.6-22V |
可调输出 |
3.0A |
0.923V |
340K |
95% |
55uA |
1uA |
ESOP8 |
|
|
CXSD61047A |
4.5-27V |
可调输出 |
3.0A |
0.925V |
340K |
93% |
1.3mA |
0.3uA |
ESOP8 |
|
CXSD61047B |
4.5V-23V |
可调输出 |
3.5A |
0.925V |
340K |
96% |
2.5mA |
ESOP-8 |
|
|
8V-35V |
可调输出 带线损补偿 |
扩流4.5A带 可调限流保护 |
1.21V |
100-500K可调 |
95% |
14mA |
100uA |
ESOP8 |
|
|
3.6-40V |
可调输出 |
2.0A |
0.8V |
440K |
94% |
74uA |
0.07uA |
ESOP-8 |
|
|
4.5-20V |
可调输出 |
4.0A |
0.923V |
340K |
95% |
1.6mA |
6uA |
ESOP8 |
|
|
3.5-23V |
可调输出 |
2.0A |
0.6V |
600K |
96% |
400uA |
1uA |
SOT-26 |
|
|
4.5-17V |
可调输出 |
2.0A |
0.6V |
600K |
96% |
400uA |
1uA |
SOT-26 |
|
|
CXSD61055A |
4.5V-23V |
可调输出 |
2.0A |
0.8V |
600K |
92% |
800uA |
SOT-26 |
|
|
CXSD61055B |
3.3-17V |
可调输出 |
2.0A |
0.6V |
600K |
96% |
400uA |
4uA |
SOT-26 |
|
4.5-26V |
可调输出 |
1.2A |
0.8V |
1.4M |
94% |
600uA |
1uA |
SOT-26 |
|
|
4.0-42V |
可调输出 |
1.5A |
0.8V |
650K |
91% |
600uA |
6uA |
SOT-26 |
|
