CXSD6274C一个内置的数字软启动与固定的软启动间隔防止输出电压超调，以及限制输入电流。CXSD6274 CXSD6274C具有优良的保护功能：POR、OCP和UVP。上电复位（POR）电路可以在控制器运行时监测VCC电源电压超过其阈值电压，内置的数字软启动提供控制电压上升的输出。过电流保护（OCP）通过使用较低MOSFET的RDS（ON）上的电压降来监测输出电流，与内部VOCP（0.29V）相比，当输出电流达到触发点时，控制器将运行软启动功能，直到故障事件消除。欠压保护（UVP）监视FB引脚电压进行短路保护，当VFB小于VREF（0.4V）的50%时，控制器直接关闭IC
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目录
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产品概述 返回TOP
The CXSD6274 CXSD6274C uses fixed 300kHz switching frequency, voltage mode, and synchronous PWM controller which drives dual N-channel MOSFETs. The device integrates the control, monitoring and protection functions into a single package, provides one controlled power output with under-voltage and over-current protections. The CXSD6274 CXSD6274C provides excellent regulation for output load variation. The internal 0.8V temperature-compensated reference voltage is designed to meet the requirement of low output voltage applications. An built-in digital softstart with fixed soft-start interval prevents the output voltage from overshoot as well as limiting the input current. The CXSD6274 CXSD6274C with excellent protection functions: POR, OCP and UVP. The Power-On-Reset (POR) circuit can monitor VCC supply voltage exceeds its threshold voltage while the controller is running, and a built-in digital soft-start provides output with controlled voltage rise. The Over-Current Protection (OCP) monitors the output current by using the voltage drop across the lower MOSFET’s RDS(ON), comparing with internal VOCP (0.29V), when the output current reaches the trip point, the controller will run the soft-start function until the fault events are removed. The Under-Voltage Protection (UVP) monitors the voltage of FB pin for short-circuit protection, when the VFB is less than 50% of VREF (0.4V), the controller will shutdown the IC directly
产品特点 返回TOP
· Single 12V Power Supply Required
· Fast Transient Response - 0~90% Duty Ratio
· 0.8V Reference with 1% Accuracy
· Shutdown Function by Controlling COMP Pin Voltage
· Internal Soft-Start (3.4ms) Function
· Voltage Mode PWM Control Design
· Under-Voltage Protection
· Over-Current Protection - Sense Low Side MOSFET’s RDS(ON)
· 300kHz Fixed Switching Frequency
· SOP-8 Package
· Lead Free and Green Devices Available (RoHS Compliant)
应用范围 返回TOP
· Graphics Card
· Mother Board
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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Switching Regulator > Buck Controller |
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Part_No |
Package |
Topology |
Archi tectu |
Phase |
No.of PWM Output |
Output Current (A) |
Input Voltage (V) |
Reference Voltage (V) |
Bias Voltage (V) |
Quiescent Current (uA) |
|
|
min |
max |
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|
SOP-14|QSOP-16 QFN4x4-16 |
Buck |
VM |
1 |
1 |
30 |
2.9 |
13.2 |
0.9 |
12 |
8000 |
|
|
SOP-8 |
Buck |
VM |
1 |
1 |
20 |
2.9 |
13.2 |
0.8 |
12 |
5000 |
|
|
SOP-8 |
Buck |
VM |
1 |
1 |
20 |
2.9 |
13.2 |
0.8 |
12 |
5000 |
|
|
QFN4x4-24 |
Multiphase |
VM |
2 |
1 |
60 |
3.1 |
13.2 |
0.6 |
12 |
5000 |
|
|
SOP-8 |
Buck |
VM |
1 |
1 |
20 |
2.2 |
13.2 |
0.8 |
5~12 |
2100 |
|
|
SOP-8 |
Buck |
VM |
1 |
1 |
20 |
2.2 |
13.2 |
0.8 |
5~12 |
2100 |
|
|
SOP8|TSSOP8 |
Buck |
VM |
1 |
1 |
5 |
5 |
13.2 |
1.25|0.8 |
5~12 |
3000 |
|
|
SOP-8 |
Buck |
VM |
1 |
1 |
10 |
3.3 |
5.5 |
0.8 |
5 |
2100 |
|
|
SOP-14 |
Buck |
VM |
1 |
1 |
10 |
5 |
13.2 |
0.8 |
12 |
2000 |
|
|
TSSOP-24 |QFN5x5-32 |
Buck |
VM |
1 |
2 |
20 |
5 |
13.2 |
0.6 |
5~12 |
4000 |
|
|
SOP14|QSOP16 |QFN-16 |
Buck |
VM |
1 |
1 |
30 |
2.9 |
13.2 |
0.9 |
12 |
4000 |
|
|
SOP-14 |
Buck |
VM |
1 |
1 |
30 |
2.2 |
13.2 |
0.6 |
12 |
5000 |
|
|
SOP-14 |
Buck |
VM |
1 |
1 |
30 |
2.2 |
13.2 |
0.6 |
12 |
5000 |
|
|
SOP-14 |
Buck |
VM |
1 |
1 |
25 |
2.2 |
13.2 |
0.8 |
12 |
5000 |
|
|
LQFP7x7 48 |TQFN7x7-48 |
Buck|Boost |Flyback |
VM |
1 |
6 |
0.015 |
1.4 |
6.5 |
- |
5 |
1800 |
|
|
TSSOP-24P |
Buck |
VM |
1 |
2 |
20 |
2.97 |
5.5 |
0.8 |
5~12 |
5000 |
|
|
SOP-14 |
Buck |
VM |
1 |
1 |
10 |
5 |
13.2 |
0.8 |
12 |
3000 |
|
|
SOP-8-P|DIP-8 |
Buck |
VM |
1 |
1 |
30 |
2.9 |
13.2 |
1.2 |
12 |
3000 |
|
|
SSOP28 QFN4x4-24 |
Buck |
VM |
1 |
2 |
20 |
5 |
24 |
0.9 |
5 |
1200 |
|
|
SOP-20 |
Buck |
VM |
1 |
2 |
20 |
2.2 |
13.2 |
0.6 |
5~12 |
4000 |
|
|
SOP8|DFN3x3-10 |
VM |
1 |
2 |
- |
- |
- |
- |
5~12 |
550 |
||
|
DIP8|SOP-8 |
Buck|Boost |Flyback |Forward |
VM |
1 |
1 |
1 |
1.2 |
9 |
24 |
5 |
9 ~ 24 |
|
|
SSOP16|QFN4x4-16 |TQFN3x3-16 |
Buck |
VM |
1 |
1 |
25 |
3 |
25 |
0.6 |
5 |
1700 |
|
|
TDFN3x3-10 |
Buck |
COT |
1 |
1 |
25 |
3 |
25 |
0.5 |
5 |
350 |
|
|
QFN4x4-24 |
Buck |
CM |
2 |
1 |
40 |
4.5 |
13.2 |
0.6 |
5~12 |
4000 |
|
|
SOP8P|TDFN3x3-10 |
Buck |
VM |
1 |
1 |
20 |
3 |
13.2 |
0.8 |
5~12 |
2500 |
|
|
SOP8P |
Buck |
VM |
1 |
1 |
25 |
3 |
13.2 |
0.6|0.8 |
5~12 |
1200 |
|
|
TDFN3x3-10 |
Buck |
VM |
1 |
1 |
25 |
4 |
13.2 |
0.8 |
5~12 |
2000 |
|
|
TDFN3x3-10 |
Buck |
COT |
1 |
1 |
25 |
4.5 |
25 |
0.6 |
5~12 |
80 |
|
|
SOP-8P |
Buck |
VM |
1 |
1 |
25 |
4.5 |
13.2 |
0.8 |
5~12 |
16000 |
|
|
TQFN3x3-10 |
Buck |
VM |
1 |
1 |
25 |
4.5 |
13.2 |
0.6 |
5~12 |
2500 |
|
|
TDFN3x3-10 |
Buck |
COT |
1 |
1 |
30 |
3 |
25 |
0.8 |
5~12 |
2000 |
|
|
TQFN3x3-16 |
Buck |
COT |
1 |
1 |
30 |
1.8 |
28 |
0.6 |
5 |
600 |
|
|
TQFN 3x3 16 |
Buck |
COT |
1 |
1 |
30 |
1.8 |
28 |
0.6 |
5 |
600 |
|
|
QFN4x4-24 |
Buck |
VM |
2 |
1 |
50 |
4.5 |
13.2 |
0.6 |
5~12 |
5000 |
|
|
TQFN4x4-24 |
Buck |
COT |
1 |
2 |
15 |
6 |
25 |
2 |
N |
550 |
|
|
TQFN4x4-24 |
Buck |
COT |
1 |
2 |
15 |
6 |
25 |
2 |
N |
550 |
|
|
TQFN4x4-4 TQFN3x3-20 |
Buck |
COT |
1 |
2 |
20 |
3 |
28 |
0.75 |
5 |
800 |
|
|
TQFN3x3-16 |
Buck |
COT |
1 |
1 |
20 |
1.8 |
28 |
0.75 |
5 |
400 |
|
|
QFN3.5x3.5-14 |TQFN3x3-16 |
Buck |
COT |
1 |
1 |
20 |
1.8 |
28 |
0.75 |
5 |
400 |
|
|
TQFN3x3-16 |
Buck |
COT |
1 |
2 |
20 |
1.8 |
28 |
0.75 |
5 |
400 |
|
|
QFN3x3-20 TQFN3x3-16 |
Buck |
COT |
1 |
2 |
20 |
3 |
28 |
1.8|1.5|0.5 |
5 |
740 |
|
|
TQFN4x4-24 |QFN3x3-20 |
Buck |
CM |
1 |
2 |
15 |
5 |
28 |
0.5 |
N |
3000 |
|
|
TDFN3x3-10 |
Buck |
COT |
1 |
1 |
20 |
1.8 |
28 |
0.5 |
5 |
250 |
|
|
TQFN3x3-20 |
Buck |
COT |
1 |
2 |
15 |
6 |
25 |
2 |
N |
550 |
|
|
TQFN 3x3 20 |
Buck |
COT |
2 |
2 |
11 |
6 |
25 |
2 |
N |
550 |
|
|
TQFN3x3-20 |
Buck |
COT |
2 |
2 |
11 |
5.5 |
25 |
2 |
N |
280 |
|
|
QFN4x4-24 |
Multiphase |
VM |
2 |
1 |
60 |
3.1 |
13.2 |
0.85 |
12 |
5000 |
|
|
SOP-8P |
Buck |
VM |
1 |
1 |
20 |
2.9 |
13.2 |
0.8 |
12 |
16000 |
|
|
SOP-20 |
Buck |
VM |
2 |
2 |
30 |
10 |
13.2 |
1 |
12 |
5000 |
|
|
TDFN3x3-10 |
Buck |
COT |
1 |
1 |
25 |
1.8 |
28 |
0.7 |
5 |
250 |
|
|
TQFN3x3-20 |
Buck |
COT |
2 |
1 |
40 |
1.8 |
25 |
REFIN Setting |
5 |
700 |
|
|
QFN 3x3 20 TQFN 3x3 16 |
Buck |
COT |
1 |
2 |
20 |
3 |
28 |
1.8|1.5 1.35|1.2 0.5 |
5 |
800 |
|
|
TQFN3x3 20 |
Buck |
COT |
1 |
2 |
15 |
3 |
28 |
0.75 |
5 |
220 |
|
|
TQFN3x3 20 |
Buck |
COT |
1 |
2 |
15 |
3 |
28 |
0.75 |
5 |
220 |
|
|
TQFN3x3-20 |
Buck |
COT |
1 |
2 |
20 |
3 |
28 |
0.75 |
5 |
180 |
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