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目录bQX嘉泰姆

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

 bQX嘉泰姆

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

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencybQX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 highbQX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.bQX嘉泰姆

二.产品特点(Features)bQX嘉泰姆

* High Efficiency: Up to 95%bQX嘉泰姆
* 600KHz Frequency OperationbQX嘉泰姆
* 2.0A Output CurrentbQX嘉泰姆
* No Schottky Diode RequiredbQX嘉泰姆
* 3.5V to 18V Input Voltage RangebQX嘉泰姆
* 0.6V ReferencebQX嘉泰姆
 Slope Compensated Current ModebQX嘉泰姆
 Control for Excellent Line and LoadbQX嘉泰姆
 Transient ResponsebQX嘉泰姆
* Integrated internal compensationbQX嘉泰姆
* Stable with Low ESR Ceramic OutputbQX嘉泰姆
   CapacitorsbQX嘉泰姆
* Over Current Protection withbQX嘉泰姆
    Hiccup-ModebQX嘉泰姆
* Input over voltage protection(OVP)bQX嘉泰姆
*  Thermal ShutdownbQX嘉泰姆
*  Inrush Current Limit and Soft StartbQX嘉泰姆
*  Available in SOT23-6 PackagebQX嘉泰姆
*  -40°C to +85°C Temperature RangebQX嘉泰姆
三,应用范围 (Applications)bQX嘉泰姆

Distributed Power SystemsbQX嘉泰姆
Digital Set Top BoxesbQX嘉泰姆
Flat Panel Television and MonitorsbQX嘉泰姆
Wireless and DSL ModemsbQX嘉泰姆
Notebook ComputerbQX嘉泰姆
四.技术规格书下载（产品PDF）bQX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！bQX嘉泰姆

 bQX嘉泰姆

五,产品封装图 (Package)bQX嘉泰姆

bQX嘉泰姆
六.电路原理图bQX嘉泰姆
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七,功能概述bQX嘉泰姆

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

Error AmplifierbQX嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andbQX嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenbQX嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,bQX嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationbQX嘉泰姆
network minimizes the external component counts and simplifies the control loop design. bQX嘉泰姆
Internal Soft-StartbQX嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingbQX嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)bQX嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSbQX嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanbQX嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.bQX嘉泰姆
Over-Current-Protection and HiccupbQX嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valuebQX嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isbQX嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isbQX嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. ThisbQX嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagebQX嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect thebQX嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isbQX嘉泰姆
removed. bQX嘉泰姆
Startup and Shutdown bQX嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. ThebQX嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then thebQX嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingbQX嘉泰姆
八,相关芯片选择指南               更多同类产品......bQX嘉泰姆

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