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LA5757TP 数据表(PDF) 3 Page - ON Semiconductor |
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LA5757TP 数据表(HTML) 3 Page - ON Semiconductor |
3 / 6 page LA5757TP No.A1439-3/6 Block Diagram 2SWOUT DRIVE OCP RESET OSC Comp. Reg. Amp. TSD 2VOS VREF 0.4V ON/OFF Comp. 1 VIN 5 SS 3 GND Constnt Current Circuit Application Circuit Example VIN SWOUT VOS GND SS L1 C1 C2 D1 LA5757TP C3 R2 R1 Notes: C3 is for the soft start function. Delete C3 and keep the SS pin open when the soft function is not necessary. Description of Functional Settings 1. Calculation equation to set the output voltage This IC controls the switching output so that the VOS pin voltage becomes 1.255V (typ). The equation to set the output voltage is as follows: VO = 1+ × 1.255V(typ) R2 R1 The VOS pin has the inrush current of 1μA (typ). Therefore, the error becomes larger when R1 and R2 resistance values are large. |
类似零件编号 - LA5757TP |
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类似说明 - LA5757TP |
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