CXSU6340是一个升压转换器，它提供一个升压输出电压来自低压电源。因为它的专利设计，它开始于非常低的输入电压，低至0.9V，待机时仅消耗15uA，使它是单电池碱性/镍氢电池操作的理想选择。开关频率为1MHz，通过允许使用微小、低轮廓感应器和陶瓷电容器。
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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 CXSU6340 is a step-up converter that provides a boosted output voltage
from a low voltage source. Because of its proprietary design, it starts up at
a very low input voltage down to 0.9V, and only consumes 15uA at standby, making
it an ideal choice for single cell alkaline/NiMH battery operations.A switching
frequency of 1MHz minimizes solution footprint by allowing the use of tiny, low
profile inductors and ceramic capacitors. The current mode PWM design is internally
compensated, reducing external parts count.
CXSU6340 is available in SOT23-5 Package.
二.产品特点(Features)
Efficiency up to 94%@Vin=3.0V, Vout=5.0V
Typical 15uA standby current
1MHz Switching Frequency allows small inductor and output cap
Input boost-strapping allows using small or no input cap
Low Vin Start-up Voltage down to 0.9V Ideal
for Single Alkaline Cell operations
Maximum Output Current up to 300mA
Low Noise PWM control
Internally Compensated Current Mode Control
Internal Synchronous Rectifier
Logic Control Shutdown (IQ<1uA)
Available in SOT23-5
三,应用范围 (Applications)
One to Three Cell Battery Operated Devices
Medical Instruments
Bluetooth Headsets
Flash-Based MP3 Players
Noise Canceling Headphones
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)
六.电路原理图
七,功能概述
|
Parameter |
Value |
|
|
SW Voltage |
-0.3 ~ 6V |
|
|
EN, OUT Voltage |
-0.3 ~ 6V |
|
|
Max Operating Junction Temperature(Tj) |
125°C |
|
|
Maximum Power Dissipation |
SOT23-5 |
450mW |
|
Ambient Temperature(Ta) |
-40°C – 85°C |
|
|
Storage Temperature(Ts) |
-55°C - 150°C |
|
|
Lead Temperature & Time |
260°C, 10S |
|
八,相关芯片选择指南
|
升压型DC/DC转换器(DC/DC Step-up Converter ) |
||||||||||
|
Part No. |
MODE |
VIN |
VOUT |
IQ |
FOSC |
Eff. |
Accu. |
Power switching |
IOUT |
Package |
|
PFM |
0.8~5.5V |
2.5~6V 100mV Step |
4μA |
450KHz |
85% |
±2% |
Internal MOSFET |
300mA |
SOT89-3 SOT23-3 SOT23-5 |
|
|
PFM |
0.8~5.5V |
2.5~6V 100mV Step |
6μA |
400KHz |
90% |
±2% |
External MOSFET |
- |
SOT89-5 SOT23-3 SOT23-5 |
|
|
Sync Boost PFM/PWM |
0.85~5V |
3.3, 5V, ADJ |
25μA |
1MHz |
95% |
±2% |
Internal Sync Rectifier |
300mA |
SOT23-5 |
|
|
Sync Boost PWM |
0.9~5V |
1.8~3.6V |
8μA |
1MHz |
94% |
±2% |
Internal Sync Rectifier |
300mA |
SOT89-3 SOT23-3 SOT23-5 |
|
|
Sync Boost PWM |
0.9~5V |
1.8~3.6V |
8μA |
1MHz |
94% |
±2% |
Internal Sync Rectifier |
300mA |
SOT89-3 SOT23-3 SOT23-5 |
|
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