Copyright

© ANPEC Electronics Corp.

Rev. A.1 - Mar., 2016

www.anpec.com.tw

6

APL5934

Pin Description

P IN

NO.

SOP -8P

TDFN3 x3-10

NAME

FUNCTIO N

1

-

G ND

Gro und pin of the circui try. All voltage levels are measure d with respect to th is

pin .

2

2

FB

Vo lta ge Fe edba ck Pin. Co nnecting this pi n to an exte rnal resistor divider

receives th e fe edback vol ta ge of the regu lator.

3,4

3,4,5

VOUT

Ou tpu t pin o f the regu lator. Conne cting this pin to load an d output ca pacito rs

(10

µF at least) is required for stability and improving transient response. The

outpu t voltage is prog rammed by th e resistor-divide r conne cted to FB pin. The

VO UT can provide 3A (max.) loa d curr ent to load s. Du ring shutdown, the ou tp ut

voltage is q uickly discharg ed by an i nte rnal pu ll-low MO SFET.

5

6,7,8

VIN

Main supp ly inp ut pin for voltage conversions. A d ecoupli ng cap acito r (

≥10µF

recommen ded) i s usua lly con necte d near this pi n to filter the voltage n oise and

impro ve transie nt respo nse. The voltage on this p in is monitore d for

Po wer -On-Re se t pu rpose.

6

1 0

VCNTL

Bia s voltag e inpu t pi n fo r internal co ntr ol circu itry. Conn ect this pin to a voltage

source (+5V recommen ded). A decoup ling capacitor (0.1

µF typical) is usually

conne cted nea r this pin to filter the voltage noise. The voltag e at this pin is

mon itor ed fo r P ower-On -Reset pu rpose.

7

1

POK

Po wer -OK signa l o utp ut pin . Th is pin is a n o pen-d rain outpu t used to ind ica te

the statu s o f ou tp ut voltag e by sensing FB voltage . This pi n is pulled low wh en

outpu t voltage is n ot within the Power-O K voltage windo w.

EN

(A PL5 934/C)

Active -high en able control pin. A pplying an d h oldin g the voltage on th is pin

bel ow the ena ble voltage thresho ld sh uts down the outpu t. Wh en re-en abled ,

the IC und ergoe s a new soft-start proce ss. W hen l eave this pin o pen, an

intern al pull- up/low curr ent (3

µA typical) pulls the EN voltage and enables/shuts

down the regu lator.

8

9

ENB

(A PL59 34B /D)

Active -low enab le control pin . Ap plying and holdi ng the vo ltage on this pin

bel ow the ena ble voltage thresho ld sh uts down the outpu t. Wh en re-en abled ,

the IC und ergoe s a new soft-start proce ss. W hen l eave this pin o pen, an

intern al pull-u p/low curre nt (3

µA typical) pulls the ENB voltage and shuts

down/en ables the regu lator.

Exposed

Pad

E xpo se d

P ad

G ND

Gro und pin of th e circuitry. Conn ect th e exp osed pad to the system grou nd plan

with la rge copp er area for dissipating hea t into the ambient air.