目录tgA嘉泰姆

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

 tgA嘉泰姆

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

     The CXSD61054   is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054   operates at high efficiencytgA嘉泰姆
over a wide output current load range.tgA嘉泰姆

      This device offers two operation modes,PWM control and PFM ModetgA嘉泰姆
switching control, which allows a high efficiency over the wider range of thetgA嘉泰姆
load.The  rber of readily available standard external components and istgA嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.tgA嘉泰姆

二.产品特点(Features)tgA嘉泰姆

* High Efficiency: Up to 95%tgA嘉泰姆
* 600KHz Frequency OperationtgA嘉泰姆
* 2.0A Output CurrenttgA嘉泰姆
* No Schottky Diode RequiredtgA嘉泰姆
* 3.5V to 18V Input Voltage RangetgA嘉泰姆
* 0.6V ReferencetgA嘉泰姆
 Slope Compensated Current ModetgA嘉泰姆
 Control for Excellent Line and LoadtgA嘉泰姆
 Transient ResponsetgA嘉泰姆
* Integrated internal compensationtgA嘉泰姆
* Stable with Low ESR Ceramic OutputtgA嘉泰姆
   CapacitorstgA嘉泰姆
* Over Current Protection withtgA嘉泰姆
    Hiccup-ModetgA嘉泰姆
* Input over voltage protection(OVP)tgA嘉泰姆
*  Thermal ShutdowntgA嘉泰姆
*  Inrush Current Limit and Soft StarttgA嘉泰姆
*  Available in SOT23-6 PackagetgA嘉泰姆
*  -40°C to +85°C Temperature RangetgA嘉泰姆
三,应用范围 (Applications)tgA嘉泰姆

Distributed Power SystemstgA嘉泰姆
Digital Set Top BoxestgA嘉泰姆
Flat Panel Television and MonitorstgA嘉泰姆
Wireless and DSL ModemstgA嘉泰姆
Notebook ComputertgA嘉泰姆
四.技术规格书下载（产品PDF）tgA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！tgA嘉泰姆

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五,产品封装图 (Package)tgA嘉泰姆

tgA嘉泰姆
六.电路原理图tgA嘉泰姆
tgA嘉泰姆
七,功能概述tgA嘉泰姆

Internal Regulator tgA嘉泰姆
The CXSD61054   is a current mode step down DC/DC converter that provides excellenttgA嘉泰姆
transient response with no extra external compensation components. This device containstgA嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KtgA嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCtgA嘉泰姆
performance.tgA嘉泰姆

Error AmplifiertgA嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andtgA嘉泰姆
outputs a current proportional to the difference between the two. This output current is thentgA嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,tgA嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationtgA嘉泰姆
network minimizes the external component counts and simplifies the control loop design. tgA嘉泰姆
Internal Soft-StarttgA嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingtgA嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)tgA嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SStgA嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thantgA嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.tgA嘉泰姆
Over-Current-Protection and HiccuptgA嘉泰姆
The JTM2234 has cycle-by-cycle over current limit when the inductor current peak valuetgA嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB istgA嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV istgA嘉泰姆
triggered, the JTM2234 enters hiccup mode to periodically restart the part. ThistgA嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagetgA嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect thetgA嘉泰姆
regulator. The JTM2234 exits the hiccup mode once the over current condition istgA嘉泰姆
removed. tgA嘉泰姆
Startup and Shutdown tgA嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. ThetgA嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then thetgA嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingtgA嘉泰姆
八,相关芯片选择指南               更多同类产品......tgA嘉泰姆