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SC194A

PRELIMINARY

POWER MANAGEMENT

Pin Descriptions

Pin #

Pin Name

Pin Function

1

VIN

Input power supply voltage

2

MODE

MODE select pin - MODE = V

3

SYNC/PWM

Oscillator synchronization input - Tie to V

mode at light loads. Apply an external clock signal for frequency synchronization.

4EN

Enable digital input - a high input enables the SC194A, a low disables and reduces quiescent current to

less than 1μA. In shutdown, LX becomes high impedance.

5

VOUT

Regulated output voltage and feedback for SC194A

6

VID0

Logic level bit 0 used in conjunction with VID1 to set the output voltage. Connect high or low as required

to select the desired output voltage. If not connected, the output voltage will be indeterminate.

7

VID1

Logic level bit 1 used in conjunction with VID0 to set the output voltage. Connect high or low as required

to select the desired output voltage. If not connected, the output voltage will be indeterminate.

8

GND

Ground

9

PGND

Power Ground

10

LX

Inductor connection to the switching FETs

T

THERMAL

PAD

Pad for heatsinking purposes - not connected internally. Connects to ground plane using

multiple vias.