电流模式PWM内部补偿CXSU6340低压电源的升压输出电压逻辑控制陶瓷电容器输出电流300毫安

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。

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
CXSU6337	PFM	0.8~5.5V	2.5~6V 100mV Step	4μA	450KHz	85%	±2%	Internal MOSFET	300mA	SOT89-3 SOT23-3 SOT23-5
CXSU6337C	PFM	0.8~5.5V	2.5~6V 100mV Step	6μA	400KHz	90%	±2%	External MOSFET	-	SOT89-5 SOT23-3 SOT23-5
CXSU6338B	Sync Boost PFM/PWM	0.85~5V	3.3, 5V, ADJ	25μA	1MHz	95%	±2%	Internal Sync Rectifier	300mA	SOT23-5
CXSU6339	Sync Boost PWM	0.9~5V	1.8~3.6V	8μA	1MHz	94%	±2%	Internal Sync   Rectifier	300mA	SOT89-3 SOT23-3 SOT23-5
CXSU6340	Sync Boost PWM	0.9~5V	1.8~3.6V	8μA	1MHz	94%	±2%	Internal Sync Rectifier	300mA	SOT89-3 SOT23-3 SOT23-5