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GRM21BR71A106KE51L Datasheet(PDF) 7 Page - STMicroelectronics |
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GRM21BR71A106KE51L Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 24 page STBB1-AXX Pin configuration DocID022197 Rev 4 7/24 3 Pin configuration Figure 2: Pin connection (top view) Table 4: Pin description Pin Symbol Name and function 1 VOUT Output voltage 2 SW2 Switch pin. Internal switches are connected to this pin. Connect inductor between SW1 to SW2 3 PGND Power ground 4 SW1 Switch pin. Internal switches are connected to this pin. Connect inductor between SW1 and SW2 5 VIN Power input voltage. Connect a ceramic bypass capacitor (10 µF minimum) between this pin and PGND 6 EN Enable pin. Connect this pin to GND or a voltage lower than 0.4 V to shut down the IC. A voltage higher than 1.2 V is required to enable the IC 7 MODE (SYNC) Operation mode selection. If MODE pin is low, the STBB1-AXX automatically switches between pulse skipping and fixed frequency PWM according to the load level. If MODE pin is pulled high, the STBB1-AXX works in PWM mode. When a square waveform is applied, this pin provides the clock signal for oscillator synchronization 8 VINA Supply voltage for control stage 9 GND Signal ground 10 FB Feedback voltage Exposed pad Power ground |
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