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FP6121-3.5-DEC-2013

FP6121

fitipower integrated technology lnc.

Typical Application Circuit

FP6121

EN1

VIN

EN2

VOUT1

VOUT2

GND

1μF

1μF

1μF

Figure 2. Typical Application Circuit of FP6121

Note：To prevent oscillation, it is recommended to use minimum 1µF X7R or X5R dielectric capacitors if ceramics are

used as input/output capacitors.

Functional Pin Description

Pin Name

Pin Function

VIN

Power is supplied to this device from this pin which requires an input filter capacitor.

In general, the input

capacitor in the range of 1µF to 10µF is sufficient.

VOUT1

The output supplies power to loads.

The output capacitor is required to prevent output voltage unstable.

The

FP6121 is stable with an output capacitor 1µ F or greater.

The larger output capacitor will be required for

application with large transit load to limit peak voltage transits, besides could reduce output noise, improve

stability and PSRR.

VOUT2

The output supplies power to loads.

The output capacitor is required to prevent output voltage unstable.

The

FP6121 is stable with an output capacitor 1µ F or greater.

The larger output capacitor will be required for

application with large transit load to limit peak voltage transits, besides could reduce output noise, improve

stability and PSRR.

GND

Common ground pin

EN1

Logic input control VOUT1 active or shut off.

The enable

pin can’t be left floating and must be tied to the Vin pin

if not used.

The shutdown mode which is independent for each channel, allowing for flexibility in power

management.

EN2

Logic input control VOUT2 active or shut off.

The enable

pin can’t be left floating and must be tied to the Vin pin

if not used.

The shutdown mode which is independent for each channel, allowing for flexibility in power

management.