SC196 datasheet(5/18 Pages) SEMTECH

5 / 18 page

Pin Descriptions

Pin #

Pin Name

Pin Function

PVIN

Input supply voltage connection to switching FETs — connect the input capacitor between this

pin and PGND directly.

VIN

Input supply voltage for control circuits

SYNC/PWM

Oscillator synchronization input. Tie to V

IN for forced PWM mode or GND to allow the part to

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

Enable digital input; a high input enables the SC196, a low disables and reduces quiescent cur-

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

VOUT

Regulated output voltage sense pin — connect to the output capacitor allowing sensing of the

output voltage.

ADJ

Output Voltage Adjust and feedback compensation pin - connect resistor divider between this

pin and GND to set the desired output voltage level.

MODE

MODE select pin — MODE = V

IN to select 100% duty cycle function, MODE = GND to disable

this function.

GND

Ground

PGND

Power Ground

Inductor connection to the switching FETs

THERMAL

PAD

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

multiple vias.

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SC196

PRELIMINARY

POWER MANAGEMENT

SC196 데이터시트(PDF) 5 Page - Semtech Corporation