EM5105VT datasheet(2/10 Pages) EXCELLIANCE

2 / 10 page

2013/04/19

A.1

EM5105

Pin Assignment

Function Block Diagram

Pin Name

Pin No.

Pin Function

POK

Power OK Indication. POK is an open-drain output. An external pull high resistor

connected to this pin is required.

Feedback Voltage. FB is the inverting input to the error amplifier. A resistor divider

from the output to GND is used to set the regulation voltage as

VOUT = (1 + R1/R2) x 0.8V (V). This pin has high impedance and should be kept from

noisy source to guarantee stable operation.

VOUT

3~5

Output Voltage. VOUT is power output pin. An internal pull low resistance exists

when the device is disabled. Minimum 10uF low ESR ceramic holding capacitor is

required at this pin for stabilizing VOUT voltage.

VIN

6~8

Input Voltage. This is the drain input to the power device that supplies current to

the output pin. Minimum 10uF low ESR ceramic capacitor is recommended at this

pin.

Enable Input. Pulling the pin below 0.3V turns the regulator off

CNTL

Supply Input for Control Circuit. CNTL provides supply voltage to the control

circuitry and driver for the pass transistor. The driving capability of output current

is proportioned to the VCNTL.

GND

Exposed

Pad

Ground.

EM5105VT 데이터시트(PDF) 2 Page - Excelliance MOS Corp.