CXSU6348系列是一种CMOS升压开关稳压器，主要由参考电压源、振荡电路、误差放大器、相位补偿电路、PWM/PFM开关控制电路组成。本产品采用外接低导通电阻Nch功率MOS，适用于高效率、高输出电流的应用场合。CXSU6348系列将其工作切换到占空比为15%的功率因数调制（PFM）控制电路，并在轻负载下切换到脉宽调制（PWM）/功率因数调制（PFM）开关控制电路，以防止IC工作电流降低效率。
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目录
7.相关产品
产品概述
The CXSU6348 series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM/PFM switching control circuit. With an external low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current. The CXSU6348 series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.
产品特点
Low voltage operation: Start-up is guaranteed from 0.9 V(IOUT =1 mA )
Duty ratio: Built-in PWM/PFM switching control circuit 15 to 78 % .
oscillator frequency：1.0MHz
External parts: coil, diode, capacitor, and transistor
Output voltage range: 1.5V ~6.5V
Output voltage accuracy：±2%
Soft start function: 2 ms.
应用范围
MP3 players, digital audio players
Digital cameras, GPS, wireless transceiver
Portable devices
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产品封装图
电路原理图
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Step-Up DC/DC Converter（升压DC/DC转换器） |
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Part |
MODE |
VIN |
VOUT |
Accu |
FOSC |
Eff. |
Application |
Package |
|
PFM |
0.9-6.5V |
3.0-5.0V |
±2.5% |
100K |
85% |
①②③④⑤⑥⑧ |
SOT23-3/SOT23-5/SOT89-3 |
|
|
PWM |
0.9-6.5V |
3.0-5.0V |
±2.5% |
100K |
87% |
①②③④⑤⑥⑧ |
SOT23-3/SOT23-5/SOT89-3 |
|
|
PFM |
0.9-6.5V |
2.7-5.6V |
±2.5% |
180K |
85% |
①②③④⑤⑥⑦ |
SOT23-5/SOT89-3/SOT23-3/TO92 |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
300K |
88% |
⑥⑦⑨⑩ |
SOT23-5 |
|
|
PFM |
0.9-6.5V |
1.8-6.0V |
±2% |
150K/ |
85% |
①②③④⑤⑥ |
SOT89-3//SOT23-5/SOT23-3 |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
300K |
88% |
⑥⑦⑨⑩ |
SOT23-5 |
|
|
CHARGE |
2.7-5.5V |
5.0V |
±3% |
650K |
81% |
①②④⑦⑧ |
SOT23-6 |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
1M |
85% |
⑥⑦⑨⑩ |
SOT23-5/ |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
1M |
85% |
⑥⑦⑨⑩ |
SOT23-5/SOT89-5 |
|
|
PFM/PWM |
2.5-5.0V |
<12V |
±2% |
1M |
85% |
⑥⑦⑨⑩ |
SOT23-6 |
|
|
PFM/PWM |
2.5-5.0V |
<20V |
±2% |
1M |
88% |
①⑥⑦⑨⑩ |
SOT23-6 |
|
|
PFM/PWM |
0.9-6.5V |
<20V |
±2% |
1.2M |
85% |
⑥⑦⑨⑩ |
SOT23-6 |
|
|
PFM/PWM, Synchronous |
2.9-4.4V |
<5.5V |
±2% |
1M |
94% |
①②④⑦ |
ESOP8 |
|
|
PFM, Synchronous |
0.9-6.5V |
1.8-6.0V |
±2% |
330K |
85% |
①②③④⑤⑥ |
SOT89-3/ SOT23-5/SOT23-3 |
|
|
PFM, Synchronous |
0.9-5.0V |
1.8-5.0V |
± 2% |
400K |
95% |
①②④⑥⑦ |
SOT89/SOT23/SOT23-5/TO92 |
|
|
PFM, Synchronous |
0.9-6.0V |
1.8-6.0V |
±2% |
140K |
81% |
①②③④⑤⑥ |
SOT89/SOT23-3 |
|
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Applications： ①Battery powered equipment②Wireless mouse, Wireless keyboard③Toys④Camera, Video camera⑤VCR⑥PDA⑦LED Lighting⑧Wireless communication equipment⑨MID⑩Audio equipment |
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◀ 上一篇:低噪声电荷泵升压DC转换器CXSU6347输入电压2.7V-5.5V输出电压5V恒定频率 650KHz负载电流300mA效率高达81%
下一篇▶:PWM/PFM开关控制升压开关稳压器CXSU6349脉宽调制占空比为15%功率因数调制低导通电阻Nch功率管
