CXSU6339是一个升压转换器，它提供增强的输出来自低压电源的电压。因为它的专利设计，它开始在非常低的输入电压下上升至0.9V，待机时仅消耗15uA，使其成为单电池碱性/镍氢电池操作的理想选择开关频率为1MHz，通过允许使用微型，低剖面感应器和陶瓷电容器。电流型PWM设计是内部补偿的，减少了外部部件的数量
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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 CXSU6339 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.CXSU6339
is available in SOT23-3 and SOT89-3 Package.
二.产品特点(Features)
Efficiency up to 94%@Vin=3.3V, Vout=5.5V
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
Available in SOT23-3 and SOT89-3
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
|
Symbol |
Parameter |
Conditions |
Min |
Typ |
Max |
Unit |
|
Vin |
Input Voltage Range |
0.9 |
5 |
V |
||
|
Vstart |
Startup Voltage |
Iout = 1mA |
0.9 |
V |
||
|
Vhold |
Hold Voltage |
Iout = 50mA |
0.5 |
0.7 |
V |
|
|
Vout |
Output Voltage Range |
1.8 |
5.5 |
V |
||
|
Output voltage accuracy |
Iout = 0mA |
2 |
% |
|||
|
Line regulation |
Iout = 50mA |
0.1 |
0.2 |
%/V |
||
|
Load regulation |
Iout = 0~300mA |
1 |
2 |
% |
||
|
Fsoc |
Switching Frequency |
Vout=0.95Vo, No inductor |
0.7 |
1 |
1.4 |
MHz |
|
Max Duty cycle |
Vout=0.95Vo, No inductor |
85 |
90 |
95 |
% |
|
|
IQ |
Quiescent Current at Vout |
Vout=1.05*Vo |
5 |
8 |
15 |
uA |
|
Supply current at Vin |
Iout = 0mA |
20 |
uA |
|||
|
Efficiency |
Iout = 100mA |
85 |
% |
|||
|
RdsonP |
PMOS Rdson |
Isw =100mA |
400 |
600 |
mohm |
|
|
RdsonN |
NMOS Rdson |
Isw =100mA |
200 |
300 |
mohm |
|
|
Iswlk |
SW Leakage Current |
Vout=5.2V, Vsw=0 or 5.2V |
1 |
uA |
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 |
|
