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LM3557SDX-2 is a sub package of LM3557,If you need see the description,please,
Featuresn VIN Range: 2.7V–7.5Vn Small External Componentsn 1.25 MHz Constant-Switching Frequencyn Output Over-Voltage Protectionn Input Under-Voltage Protectionn Cycle-By-Cycle Current Limitn TRUE SHUTDOWN: No DC current paths to groundduring shutdownn Low Profile Package: <1 mm Height -8 Pin LLPn No External CompensationApplicationsn White LED Display Lightingn Cellular Phones
The LM3557 is a complete solution for white LED driveapplications. With minimal external component count, no DCcurrent leakage paths to ground, cycle-by-cycle current limitprotection, and output over-voltage protection circuitry, theLM3557 offer superior performance and cost savings overstandard DC/DC boost component implementations.The LM3557 switches at a fixed-frequency of 1.25 MHz,which allows for the use of small external components. Also,the LM3557 has a wide input voltage range to take advantageof multi-cell input applications. With small external components,high fixed frequency operation, and wide inputvoltage range, the LM3557 is the most optimal choice forLED lighting applications.Features
W e accept the Paypal/ Western union/ /TT, you can choose you like. Also We accept Escrow for payment. but beyond 400USD per orderWe will send the goods within 2 days after buyer's payment We will responsible for the China customs problem and buyer should be responsible for the destination customs problem We provide EMS,DHL,UPS, or Airmail for shipping method.express shipping usually take 3-5 working days depends on the country delivered to.4.If other shipping ways are preferred, contact us and we will use your ways. We will give you track number when we send the products out,so you can check it in line.
5. Please check out your ADDRESS carefully when processing order
1. We test it before ship out All of the products be make sure working well and then sent out .
2..we can change within one month, But you should pay the freight from your country to China.Than we will change for you.but the freight is paid a half each.if the damage is man-made,we don't afford it .
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ntegrated Circuits LM3557SDX-2 Step-Up Converter For White LED Applications