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S8540 Datasheet(PDF) 6 Page - Seiko Instruments Inc |
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S8540 Datasheet(HTML) 6 Page - Seiko Instruments Inc |
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6 / 36 page  STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER S-8540/8541 Series Rev.4.0_01 6 Absolute Maximum Ratings Table 4 (Ta = 25 °C unless otherwise specified) Item Symbol Absolute Maximum Ratings Unit VIN pin voltage VIN VSS − 0.3 to VSS + 12 V CVREF pin voltage VCVREF VSS − 0.3 to VIN + 0.3 V ON/OFF pin voltage VON/OFF VSS − 0.3 to VSS + 12 V FB pin voltage*1 VFB VSS − 0.3 to VSS + 12 V VOUT pin voltage VOUT VSS − 0.3 to VSS + 12 V SENSE pin voltage VSENSE VSS − 0.3 to VSS + 12 V EXT pin voltage VEXT VSS − 0.3 to VIN + 0.3 V EXT pin current IEXT ± 100 mA Power dissipation PD 300 (When not mounted on board) mW 500*2 mW Operating ambient temperature Topr − 40 to + 85 °C Storage temperature Tstg − 40 to + 125 °C *1. Feed back type (B, D types) *2. When mounted on board [Mounted board] (1) Board size : 114.3 mm × 76.2 mm × t1.6 mm (2) Board name : JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. (1) When mounted on board (2) When not mounted on board 0 50 100 150 400 200 0 Ambient temperature Ta ( °C) 500 300 100 600 0 50 100 150 200 100 0 Ambient temperature Ta ( °C) 250 150 50 300 350 Figure 4 Power Dissipation of Package |
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