CXSD610331.5MHz constant frequency current mode, dual high-efficiency PWM step-down converter high

目录LTn嘉泰姆

1.产品概述                       2.产品特点LTn嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 LTn嘉泰姆
5.产品封装图                     6.电路原理图                   LTn嘉泰姆
7.功能概述                        8.相关产品LTn嘉泰姆

一,产品概述(General Description)         LTn嘉泰姆

   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. LTn嘉泰姆

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.LTn嘉泰姆

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.LTn嘉泰姆
二.产品特点(Features)LTn嘉泰姆
1.)High Efficiency: Up to 96%LTn嘉泰姆
2.)1.5MHz Constant Frequency OperationLTn嘉泰姆
3.)Dual 2A Output CurrentLTn嘉泰姆
4.)No Schottky Diode RequiredLTn嘉泰姆
5.)2.3V to6V Input Voltage RangeLTn嘉泰姆
6.)Output Voltage as Low as 0.6VLTn嘉泰姆
7.)100% Duty Cycle in DropoutLTn嘉泰姆
8.)Low Quiescent Current:40μALTn嘉泰姆
9.)Short Circuit ProtectionLTn嘉泰姆
10.)Thermal Fault ProtectionLTn嘉泰姆
11.)Inrush Current Limit and Soft StartLTn嘉泰姆
12.)<1μA Shutdown CurrentLTn嘉泰姆
13.)ESOP8 packageLTn嘉泰姆
三,应用范围 (Applications)LTn嘉泰姆
1.)Set Top BoxLTn嘉泰姆
2.)Wireless and DSL ModemsLTn嘉泰姆
3.)PDAsLTn嘉泰姆
4.)Computer PeripheralsLTn嘉泰姆
5.)Portable InstrumentsLTn嘉泰姆
6.)Digital Still and Video CamerasLTn嘉泰姆
四.下载产品资料PDF文档 LTn嘉泰姆

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！LTn嘉泰姆

 LTn嘉泰姆

五,产品封装图 (Package)LTn嘉泰姆
LTn嘉泰姆

六.电路原理图LTn嘉泰姆
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七,功能概述LTn嘉泰姆
The CXSD61033 is a dual high output current monolithicLTn嘉泰姆
switch mode step-down DC-DC converter. TheLTn嘉泰姆
device operates at a fixed 1.5MHz switchingLTn嘉泰姆
frequency, and uses a slope compensated currentLTn嘉泰姆
mode architecture. This step-down DC-DC converterLTn嘉泰姆
can supply up to dual respective 2000mA outputLTn嘉泰姆
current at VIN = 3.6V and has an input voltage rangeLTn嘉泰姆
from 2.3V to 6V. It minimizes external componentLTn嘉泰姆
size and optimizes efficiency at the heavy loadLTn嘉泰姆
range. The slope compensation allows the device toLTn嘉泰姆
remain stable over a wider range of inductor valuesLTn嘉泰姆
so that smaller values (1μH to 4.7μH) with lowerLTn嘉泰姆
DCR can be used to achieve higher efficiency. OnlyLTn嘉泰姆
a small bypass input capacitor is required at theLTn嘉泰姆
output. The adjustable version can be programmedLTn嘉泰姆
with external feedback to any voltage, ranging fromLTn嘉泰姆
0.6V to nearly the input voltage. It uses internalLTn嘉泰姆
MOSFETs to achieve high efficiency and canLTn嘉泰姆
generate very low output voltages by using anLTn嘉泰姆
internal reference of 0.6V. At dropout, the converterLTn嘉泰姆
duty cycle increases to100% and the output voltageLTn嘉泰姆
tracks the input voltage minus the low RDS(ON)LTn嘉泰姆
drop of the P-channel high-side MOSFET and theLTn嘉泰姆
inductor DCR. The internal error amplifier andLTn嘉泰姆
compensation provides excellent transient response,LTn嘉泰姆
load and line regulation. Internal soft start eliminatesLTn嘉泰姆
any output voltage overshoot when the enable or theLTn嘉泰姆
input voltage is applied.LTn嘉泰姆
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