目录UkC嘉泰姆

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

 UkC嘉泰姆

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

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

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

二.产品特点(Features)UkC嘉泰姆

* High Efficiency: Up to 95%UkC嘉泰姆
* 600KHz Frequency OperationUkC嘉泰姆
* 2.0A Output CurrentUkC嘉泰姆
* No Schottky Diode RequiredUkC嘉泰姆
* 3.5V to 18V Input Voltage RangeUkC嘉泰姆
* 0.6V ReferenceUkC嘉泰姆
 Slope Compensated Current ModeUkC嘉泰姆
 Control for Excellent Line and LoadUkC嘉泰姆
 Transient ResponseUkC嘉泰姆
* Integrated internal compensationUkC嘉泰姆
* Stable with Low ESR Ceramic OutputUkC嘉泰姆
   CapacitorsUkC嘉泰姆
* Over Current Protection withUkC嘉泰姆
    Hiccup-ModeUkC嘉泰姆
* Input over voltage protection(OVP)UkC嘉泰姆
*  Thermal ShutdownUkC嘉泰姆
*  Inrush Current Limit and Soft StartUkC嘉泰姆
*  Available in SOT23-6 PackageUkC嘉泰姆
*  -40°C to +85°C Temperature RangeUkC嘉泰姆
三,应用范围 (Applications)UkC嘉泰姆

Distributed Power SystemsUkC嘉泰姆
Digital Set Top BoxesUkC嘉泰姆
Flat Panel Television and MonitorsUkC嘉泰姆
Wireless and DSL ModemsUkC嘉泰姆
Notebook ComputerUkC嘉泰姆
四.技术规格书下载（产品PDF）UkC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！UkC嘉泰姆

 UkC嘉泰姆

五,产品封装图 (Package)UkC嘉泰姆

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

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

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