Diodes AP7217A - Manual (Page 8)

AP7217A
3.3V 600mA CMOS LDO
AP7217A Rev. 3 8 of 10 OCTOBER 2009
DS31423 www.diodes.com © Diodes Incorporated
Current Limit Protection
When output current at OUT pin is higher than current limit
threshold, the current limit protection will be triggered and clamp
the output current to approximately 750mA to prevent
over-current and to protect the regulator from damage due to
overheating.
Short circuit protection
When VR
OUT
pin is shorted to GND or VR
OUT
voltage is less than
200mV, short circuit protection will be triggered and clamp the
output current to approximately 50mA.
VD
OUT
(reset output)
---Open-Drain Active-Low reset output---
In general, VD
OUT
is pulled up by a resistor (100Kohm) to V
IN
.
The AP7217A microprocess (uP) supervisory circuitry asserts a
guaranteed logic-low reset during power-up and power-down.
Reset is asserted asserts when V
IN
is below the reset threshold
and remain asserted for at least t
RP
after V
IN
rises above the reset
threshold.
As long as V
IN
is lower than the reset threshold, VD
OUT
remains at
logic "0". When V
IN
become higher than V
TH
, a logic "1" is
asserted after a time delay defined by t
RP
.
Marking Information
(1) SOP-8L
( Top View )
7217A-33
YY WW X X
Logo
Part Number
5 8
4 1
WW : Week : 01~52; 52
YY : Year : 08, 09,10~
G : Green
X : Internal Code
represents 52 and 53 week
(2) SOP-8L-EP
( Top View )
7217A-33
YY WW X X
Logo
Part No.
5 8
4 1
E
WW : Week : 01~52; 52
YY : Year : 08, 09,10~
G : Green
X : Internal Code
represents 52 and 53 week
SOP-8L-EP
Application Note
(Continued)
Vin Vout
C Co
ESR
IN OUT
GND
AP7217A
Iin Iout
Iq