目录m3D嘉泰姆

1.产品概述                       2.产品特点m3D嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 m3D嘉泰姆
5.产品封装图                     6.电路原理图                   m3D嘉泰姆
7.功能概述                        8.相关产品m3D嘉泰姆

 m3D嘉泰姆

一,产品概述(General Description)      m3D嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencym3D嘉泰姆
over a wide output current load range.This device offers two operation modes,PWM control and PFM Mode switching control, which allows a highm3D嘉泰姆
efficiency over the wider range of the load.The  rber of readily available standard external components and is available in an 6-pin SOT23 ROHS compliant package.m3D嘉泰姆

二.产品特点(Features)m3D嘉泰姆

* High Efficiency: Up to 95%m3D嘉泰姆
* 600KHz Frequency Operationm3D嘉泰姆
* 2.0A Output Currentm3D嘉泰姆
* No Schottky Diode Requiredm3D嘉泰姆
* 3.5V to 18V Input Voltage Rangem3D嘉泰姆
* 0.6V Referencem3D嘉泰姆
 Slope Compensated Current Modem3D嘉泰姆
 Control for Excellent Line and Loadm3D嘉泰姆
 Transient Responsem3D嘉泰姆
* Integrated internal compensationm3D嘉泰姆
* Stable with Low ESR Ceramic Outputm3D嘉泰姆
   Capacitorsm3D嘉泰姆
* Over Current Protection withm3D嘉泰姆
    Hiccup-Modem3D嘉泰姆
* Input over voltage protection(OVP)m3D嘉泰姆
*  Thermal Shutdownm3D嘉泰姆
*  Inrush Current Limit and Soft Startm3D嘉泰姆
*  Available in SOT23-6 Packagem3D嘉泰姆
*  -40°C to +85°C Temperature Rangem3D嘉泰姆
三,应用范围 (Applications)m3D嘉泰姆

Distributed Power Systemsm3D嘉泰姆
Digital Set Top Boxesm3D嘉泰姆
Flat Panel Television and Monitorsm3D嘉泰姆
Wireless and DSL Modemsm3D嘉泰姆
Notebook Computerm3D嘉泰姆
四.技术规格书下载（产品PDF）m3D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！m3D嘉泰姆

 m3D嘉泰姆

五,产品封装图 (Package)m3D嘉泰姆

m3D嘉泰姆
六.电路原理图m3D嘉泰姆
m3D嘉泰姆
七,功能概述m3D嘉泰姆

Internal Regulator m3D嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentm3D嘉泰姆
transient response with no extra external compensation components. This device containsm3D嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600Km3D嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCm3D嘉泰姆
performance.m3D嘉泰姆

Error Amplifierm3D嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andm3D嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenm3D嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,m3D嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationm3D嘉泰姆
network minimizes the external component counts and simplifies the control loop design. m3D嘉泰姆
Internal Soft-Startm3D嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingm3D嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)m3D嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSm3D嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanm3D嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.m3D嘉泰姆
Over-Current-Protection and Hiccupm3D嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valuem3D嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB ism3D嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV ism3D嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. Thism3D嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagem3D嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect them3D嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition ism3D嘉泰姆
removed. m3D嘉泰姆
Startup and Shutdown m3D嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. Them3D嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then them3D嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingm3D嘉泰姆
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