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SGM6132 Datasheet(PDF) 3 Page - SG Micro Corp |
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SGM6132 Datasheet(HTML) 3 Page - SG Micro Corp |
3 / 14 page SGM6132 3A, 28.5V, 1.4MHz Step-Down Converter 3 SG Micro Corp www.sg-micro.com PIN CONFIGURATION (TOP VIEW) 3 1 2 SOIC-8 (Exposed Pad) GND BS SW 4 6 8 7 5 IN FB SS COMP EN PIN DESCRIPTION PIN NAME FUNCTION 1 BS High-side Gate Drive Boost Input. BS supplies the driver for the high-side N-Channel MOSFET switch. Connect a 10nF or greater capacitor from SW to BS to power the high-side switch. A 10Ω resistor placed between SW and BS cap is strongly recommended to reduce SW spike voltage. 2 IN Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive IN with a 4.5V to 28.5V power source. Bypass IN to GND with a sufficiently large capacitor to eliminate noise on the input to the IC. 3 SW Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC filter from SW to the output load. Note that a capacitor is required from SW to BS to power the high-side switch. 4 GND Ground. (Connect the exposed pad on backside to pin 4.) 5 FB Feedback Input. The voltage at this pin is regulated to 0.8V. Connected to the resistor divider between output and ground to set output voltage. 6 COMP Compensation Node. COMP is used to compensate the regulation control loop. Connect a series RC network from COMP to GND to compensate the regulation control loop. In some cases, an additional capacitor from COMP to GND is required. 7 EN Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator, and drive EN low to turn it off. Output voltage is discharged when the IC is off. For automatic startup, leave EN unconnected. 8 SS Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND to set the soft-start period. A 0.1µF capacitor sets the soft-start period to 10ms. To disable the soft-start feature, leave SS unconnected. Exposed Pad GND Power Ground Exposed Pad. Must be connected to GND plane. |
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