CXSD61033 1.5MHz constant frequency current mode, dual high-efficiency PWM step-down converter high current up t o 2A each channel from single-cell Lithium-ion batteries

CXSD61033 can run at 100% duty cycle for low dropout operation, extending battery life in portable systems while light load operation provides very low output ripple for noise sensitive applications

目录

1.产品概述                       2.产品特点
3.应用范围                       4.下载产品资料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 CXSD61033 is a 1.5MHz constant frequency current mode, dual high-efficiency PWM step-down converter.It is ideal for portable equipment requiring very high current up t o 2A each channel from single-cell Lithium-ion batteries while still achieving over 90%efficiency during peak load onditions. The CXSD61033 also can run at 100% duty cycle for low dropout operation, extending battery life in portable systems while light load operation provides very low output ripple for noise sensitive applications. The CXSD61033 can supply up to 2A output load current each channel from a 2.3V to 6V input voltage and the output voltage can be regulated as low as 0.6V. The high switching frequency minimizes the size of external components while keeping switching losses low. 

The internal slope compensation setting allows the device to operate with smaller inductor values to optimize size and provide efficient operation. The device is available in a Pb-free, 8-Lead ESOP package and is rated over the -40°C to +85°C temperature range.

This device offers two operation modes, PWM control and PFM Mode switching control, which allows a high efficiency over the wider range of the load.
二.产品特点(Features)
1.)High Efficiency: Up to 96%
2.)1.5MHz Constant Frequency Operation
3.)Dual 2A Output Current
4.)No Schottky Diode Required
5.)2.3V to6V Input Voltage Range
6.)Output Voltage as Low as 0.6V
7.)100% Duty Cycle in Dropout
8.)Low Quiescent Current:40μA
9.)Short Circuit Protection
10.)Thermal Fault Protection
11.)Inrush Current Limit and Soft Start
12.)<1μA Shutdown Current
13.)ESOP8 package
三,应用范围 (Applications)
1.)Set Top Box
2.)Wireless and DSL Modems
3.)PDAs
4.)Computer Peripherals
5.)Portable Instruments
6.)Digital Still and Video Cameras
四.下载产品资料PDF文档 

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五,产品封装图 (Package)

六.电路原理图

七,功能概述
The CXSD61033 is a dual high output current monolithic
switch mode step-down DC-DC converter. The
device operates at a fixed 1.5MHz switching
frequency, and uses a slope compensated current
mode architecture. This step-down DC-DC converter
can supply up to dual respective 2000mA output
current at VIN = 3.6V and has an input voltage range
from 2.3V to 6V. It minimizes external component
size and optimizes efficiency at the heavy load
range. The slope compensation allows the device to
remain stable over a wider range of inductor values
so that smaller values (1μH to 4.7μH) with lower
DCR can be used to achieve higher efficiency. Only
a small bypass input capacitor is required at the
output. The adjustable version can be programmed
with external feedback to any voltage, ranging from
0.6V to nearly the input voltage. It uses internal
MOSFETs to achieve high efficiency and can
generate very low output voltages by using an
internal reference of 0.6V. At dropout, the converter
duty cycle increases to100% and the output voltage
tracks the input voltage minus the low RDS(ON)
drop of the P-channel high-side MOSFET and the
inductor DCR. The internal error amplifier and
compensation provides excellent transient response,
load and line regulation. Internal soft start eliminates
any output voltage overshoot when the enable or the
input voltage is applied.
八,相关产品                      更多同类产品......

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型号	输入耐压	输出电压	输出电流	反馈 电压	工作频率	效率	静态工 作电流	待机 电流	封装
CXSD61028	8V-35V	可调输出/带线损补偿	扩流4.2A/双通道带CC/CV模式	1.21V	100-500K可调	95%	14mA	100uA	ESOP8
CXSD61029	8V-30V	可调输出/带线损补偿	4.0A/双通道带CC/CV模式	1.2V	100KHz	96%	10mA		ESOP-8
CXSD61030	8V-40V	可调输出/带线损补偿	扩流4.2A/双通道带CC/CV模式	1.2V	100KHz	95%	10mA		SOP-8
CXSD61031	8V-40V	可调输出/带线损补偿	扩流6.0A/双通道带CC/CV模式	1.2V	100KHz	96%	10mA		ESOP-8
双路低压同步DC-DC降压IC
型号	输入耐压	输出电压	输出电流	反馈 电压	工作频率	效率	静态工 作电流	待机 电流	封装
CXSD61032	3.0V-6.0V	双路可调	1.5A	0.6V	1.5MHz	90%		10uA	ESOP-8
CXSD61033	2.3V-6.0V	双路可调	2A	0.6V	1.5MHz	90%	150uA	0.1uA	ESOP-8
CXSD61034	2.5V-6.0V	双路可调	0.9A	0.6V	1.4MHz	95%	200uA	0.1uA	DFN3*3