UR5516A-SH2-R datasheet(2/9 Pages) UTC

2 / 9 page

UR5516A

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

2 of 9

www.unisonic.com.tw

QW-R101-018,A

PIN CONFIGURATION

NC: No Connection

PIN DESCRIPTION

PIN NAME

I/O

DESCRIPTION

VIN

Main power input pin. Connect this pin to a voltage source and an input capacitor. The

UTC UR5516A sources current to VOUT pin by controlling the upper NPN pass transistor,

providing a current path from VIN pin.

GND

Power and signal ground. Connect this pin to system ground plane with shortest traces.

The UTC UR5516A sinks current from VOUT pin by controlling the lower NPN pass

transistor, providing a current path to GND pin. This pin is also the ground path for

internal control circuitry.

VCNTL

Power input pin for internal control circuitry. Connect this pin to a voltage source,

providing a bias for the internal control circuitry. A bypass capacitor is usually connected

near this pin.

VREF

Reference voltage input and active-low shutdown control pin. Apply a voltage to this pin

as a reference voltage for the UTC UR5516A. Connect this pin to a resistor divider,

between VIN and GND, and a capacitor for soft-start and filtering noise purposes.

Applying and holding this pin low by an open-drain transistor to shut down the output.

VOUT

Output pin of the regulator. Connect this pin to load. Output capacitors connected this pin

improves stability and transient response. The output voltage tracks the reference

voltage and is capable of sourcing or sinking current up to 3A.

UR5516A-SH2-R Datasheet(PDF) 2 Page - Unisonic Technologies