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TPPM0115DR Datasheet(PDF) 9 Page - Texas Instruments |
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TPPM0115DR Datasheet(HTML) 9 Page - Texas Instruments |
9 / 13 page TPPM0115 SWITCH MODE SYNCHRONOUS BUCK CONTROLLER SLVS371A− MARCH 2001 − REVISED JUNE 2001 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION 1-V Ref VCC 20 k Ω VDD 1 µF 12 V Supply PWRGD TPPM0115 DRVH PHASE DRVL GND SEN 4 µH Optional 0.1 µF 4.7 µF 1 V to 2.5 V 0.1 µF 4.7 µF 5 V 1.7 µH NOTES: A. The heavy lines must be kept short and connected to the ground plane construction for efficient results. B. The feedback (sense) trace should be kept from the inductor flux. C. The 1500- µF capacitor should have a low ESR to minimize output voltage ripple. D. External FETs are MTD3302 or PHD55N03LT. E. Set the resistor values on the SEN terminal using the following formulas: F. Maximum efficiency is dependent on proper selection of external components. G. Line and load regulation is dependent on proper selection of external components. Optional: When resistor feedback network is not used, VOUT must be connected directly to SEN input to provide output regulation at VOUT = Vref. 4.7 µF 2200 µF 2200 µF 680 pF R1 R2 1500 µF Low ESR 1500 µF Low ESR VOUT V OUT + V ref (R1 ) R2) R2 , where V ref + 1V 2.2 Ω 4.7 nF Figure 8. Typical Application Schematic |
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