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LT3489 Datasheet(PDF) 1 Page - Linear Technology |
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LT3489 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page LT3489 1 3489f AVDD LOAD CURRENT (mA) 0 65 70 75 300 500 3489 TA01b 60 55 50 100 200 400 80 85 90 700 600 VON LOAD = 10mA VOFF LOAD = 20mA 2MHz Boost DC/DC Converter with 2.5A Switch and Soft-Start The LT ®3489 is a fixed frequency step-up DC/DC converter containing an internal 2.5A, 40V switch. The LT3489 is ideal for large TFT-LCD panel power supplies. The LT3489 switches at 2MHz, allowing the use of tiny, low profile inductors and low value ceramic capacitors. Loop com- pensation can be either internal or external, giving the user flexibility in setting loop compensation and allow- ing optimized transient response with low ESR ceramic output capacitors. Soft-start is controlled with an external capacitor, which determines the input current ramp rate during start-up. The 8-lead MS8E package and high switching frequency en- sure a low profile overall solution less than 1.1mm high. ■ TFT-LCD Bias Supplies ■ GPS Receivers ■ DSL Modems ■ Local Power Supply ■ 2.5A, 0.12Ω, 40V Internal Switch ■ 2MHz Switching Frequency ■ Integrated Soft-Start Function ■ VIN Range: 2.6V to 16V ■ Adjustable Output from VIN to 40V ■ Low VCESAT Switch: 110mV at 1A (Typical) ■ 8V at 610mA from a 3.3V Input ■ Internal or External Loop Compensation ■ Small 8-Lead MS8E Low Profile, Triple Output TFT Supply (8V, –8V, 23V) APPLICATIO S FEATURES DESCRIPTIO TYPICAL APPLICATIO , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. VIN VIN 3.3V SW FB LT3489 2.2 µH 5.23k 37.4k 28.7k 3489 TA01 20 µF 220pF 0.1 µF 0.1 µF 0.1 µF 2 µF 2 µF 4.7 µF 100nF VOFF –8V 20mA AVDD 8V 610mA VON 23V 10mA 0.1 µF VC GND SHDN SS COMP + OFF ON Efficiency |
Similar Part No. - LT3489_15 |
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Similar Description - LT3489_15 |
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