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L6902D013TR Scheda tecnica(PDF) 3 Page - STMicroelectronics |
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L6902D013TR Scheda tecnica(HTML) 3 Page - STMicroelectronics |
3 / 11 page L6902 Test and application circuit Doc ID 7332 Rev 9 3/11 1 Test and application circuit Figure 1. Test and application circuit 2 Pin connection Figure 2. Pin connection Table 2. Pin description N° Pin Function 1 OUT Regular output 2 CS+ Current error amplifier input (current sense at higher voltage) 3 CS- Current error amplifier input (current sense at lower voltage) 4 COMP E/A output to be used for frequency compensation 5FB Stepdown feedback input. Connecting directly to this pin results in an output voltage of 1.235 V. An external resistive divider is required for higher output voltages. In this case: 6 VREF 3.3 V VREF. No cap is need for stability. 7 GND Ground 8 VCC Unregulated DC input voltage. V out V FB 1 R1 R2 -------- + ⎝⎠ ⎛⎞ ⋅ 1.235V 1 R1 R2 -------- + ⎝⎠ ⎛⎞ == |
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