SC3102

Pin Descriptions

Pin #

Pin Name

Pin Function

1,2

PVIN

Input supply voltage for the converter power stage.

3

AGND

Ground connection for the internal circuitry. AGND needs to be connected to PGND directly.

4AVIN

Power supply for the internal circuitry. AVIN is required to be connected to PVIN through an R-C filter of 1Ω

and 100nF.

5

MODE

MODE select pin. When connected to logic high, the device operates in forced PWM mode. When connected

to logic low, it operates in forced PSAVE mode at light load. The MODE pin has a 500kΩ internal pulldown re-

sistor. This resistor is switched in circuit whenever the MODE pin is “Low” or when the part is in undervoltage

lockout or disabled.

6EN

Enable pin. When connected to logic high or tied to the AVIN pin, the SC3102 is on. When connected to logic

low, the device enters shutdown and consumes less than 1μA current (typ.). The enable pin has a 500kΩ

internal pulldown resistor. This resistor is switched in circuit whenever the EN pin is “Low” or when the part is

in undervoltage lockout.

7

PGOOD

Power good indicator. When the output voltage reaches the PGOOD threshold, this pin will be open-drain

(after the PGOOD delay), otherwise it is pulled low internally.

8

NC

No connection.

9SS

Soft-Start. Connect a soft-start capacitor to program the soft-start time. There is a 5μA charging current flow-

ing out of the pin.

10

VOUT

Output voltage sense pin.

11,12,13

PGND

Ground connection for converter power stage.

14,15,16

LX

Switching node - connect an inductor between this pin and the output capacitor.

T

Thermal Pad

Thermal pad for heatsinking purposes. Connection to PGND is recommended. It is not connected internally.

5