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L6928Q1 Datasheet(PDF) 3 Page - STMicroelectronics |
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L6928Q1 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 16 page L6928 Pin settings Doc ID 11051 Rev 6 3/16 1 Pin settings Figure 2. Pin connection (top view) Table 1. Pin description Pin n° Name Description 1RUN Shutdown input. When connected to a low level (lower than 0.4 V) the device stops working. When high (higher than 1.3 V) the device is enabled. 2COMP Error amplifier output. A compensation network has to be connected to this pin. Usually a 220 pF capacitor is enough to guarantee the loop stability. 3VFB Error amplifier inverting input. The output voltage can be adjusted from 0.6 V up to the input voltage by connecting this pin to an external resistor divider. 4 GND Ground. 5LX Switch output node. This pin is internally connected to the drain of the internal switches. 6VCC Input voltage. The start up input voltage is 2.2 V (typ) while the operating input voltage range is from 2 V to 5.5 V. An internal UVLO circuit realizes a 100 mV (typ.) hysteresis. 7 SYNC Operating mode selector input. When high (higher than 1.3 V) the low consumption mode is selected. When low (lower than 0.5 V) the low noise mode is selected. If connected with an appropriate external synchronization signal (from 500 kHz up to 1.4 MHz) the internal synchronization circuit is activated and the device works at the same switching frequency. 8 PGOOD Power good comparator output. It is an open drain output. A pull-up resistor should be connected between PGOOD and VOUT (or VCC depending on the requirements). The pin is forced low when the output voltage is lower than 90% of the regulated output voltage and goes high when the output voltage is greater than 90% of the regulated output voltage. If not used the pin can be left floating. RUN COMP VFB GND 1 3 2 4LX VCC SYNC PGOOD 8 7 6 5 D01IN1239AMOD |
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