APL5331
Ordering and Marking Information
P ackage C ode
APL5331
K : S O P -8
K A : S O P -8-P
G 5 : T O -263-5
U 5 : TO -252-5
Tem p. R ange
C : 0 to 70 oC
Lead F ree C ode
H andling C ode
Tem p. R ange
P ackage C ode
H andling C ode
TR : Tape & R eel
Lead F ree C ode
L : Lead Free D evice
B lank : O rginal D evice
A P L5331K C -TR :
A P L5331K A C -TR :
A P L5331
XXXXX
XXXXX
-
-
D ate C ode
XXXXX
A P L5331U 5C -TR :
A P L5331G 5C -TR :
A P L5331
XXXXX
D ate C ode
Pin Description
PIN NAME
I/O
DESCRIPTION
Main power input pin. Connect this pin to a voltage source and an input
capacitor. The APL5331 sources current to VOUT pin by controlling the upper
NPN pass transistor, providing a current path from VIN pin.
VIN
I
Power and signal ground. Connect this pin to system ground plane with shortest
traces. The APL5331 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.
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.
GND
O
I
VCNTL
Reference voltage input and active-low shutdown control pin. Apply a voltage to
this pin as a reference voltage for the APL5331. 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.
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.
VREF
VOUT
I
O
Block Diagram
VC NTL
VIN
V oltage
Current
Lim it
Therm al
Lim it
VOUT
Regulation
VREF
S hutdown
GND
Copyright ANPEC Electronics Corp.
Rev. A.8 - Oct., 2003
2
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
