LV5980MC

No.A2104-4/16

Pin Assignment

Pin Function Description

Pin No,

Pin Name

Function

1

PDR

Pch MOSFET gate drive Voltage.

The bypass capacitor is necessarily connected between this pin and VIN.

2

GND

Ground Pin. Ground pin voltage is reference voltage

3

SS/HICCUP

Capacitor connection pin for soft start and setting re-startup cycle in HICCUP mode.

About 1.8uA current charges the soft start capacitor.

4

COMP

Error Amplifier Output Pin.

The phase compensation network is connected between GND pin and COMP pin.

Thanks to current-mode control, comp pin voltage would tell you the output current amplitude. Comp pin is connected

internally to an Init.comparator which compares with 0.9V reference. If comp pin voltage is larger than

0.9V, IC operates in “continuous mode”. If comp pin voltage is smaller than 0.9V,

IC operates in “discontinuous mode (low consumption mode)”.

5

FB

Error amplifier reverse input pin.

ICs make its voltage keep 1.235V.

Output voltage is divided by external resistances and it across FB.

6

REF

Reference voltage.

7

VIN

Supply voltage pin.

It is observed by the UVLO function.

When its voltage becomes 3.7V or more, ICs startup in soft start.

8

SW

High-side Pch MOSFET drain Pin.

1

PDR

2

GND

3

SS/HICCUP

4

COMP

SW

8

VIN

7

REF

6

FB

5

LV5980MC

SOIC8

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