SGM6230 Datasheet, PDF (3/14 Pages) SG Micro Corp – Step-Down Converter

SGM6230
PIN CONFIGURATION (TOP VIEW)
2A, 38V, 385kHz Step-Down Converter
BS 1
8 SS
IN 2
7 EN
SW ³
6 _COMP
GND 4
5 FB
SOIC-8 (Exposed Pad)
PIN DESCRIPTION
PIN NAME
FUNCTION
High-side Gate Drive Boost Input. BS supplies the driver for the high-side N-Channel MOSFET
1
BS 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.
Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive
2
IN IN with a 4.5V to 38V power source. Bypass IN to GND with a sufficiently large capacitor to
eliminate noise on the input to the IC.
Power Switching Output. SW is the switching node that supplies power to the output. Connect
3
SW 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.
Compensation Node. COMP is used to compensate the regulation control loop. Connect a
6
COMP 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.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the
7
EN regulator, and drive EN low to turn it off. Output voltage is discharged when the IC is off. For
automatic startup, leave EN unconnected.
Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from SS to GND
8
SS 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.
SG Micro Corp
3
www.sg-micro.com