User Manual

AP7311
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7311 Rev. 2 5 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
Electrical Characteristics
(T
A
= 25
o
C, V
IN
= V
OUT
+1V, C
IN
= 1uF, C
OUT
= 1uF, V
EN
= 2V, unless otherwise stated)
Symbol Parameter Test Conditions Min Typ. Max Unit
I
Q
Input Quiescent Current
V
EN
= V
IN
, I
OUT
= 0mA
⎯
55 75
μA
V
EN
= V
IN
, I
OUT
= 150mA 65 85
I
SHDN
Input Shutdown Current V
EN
= 0V, I
OUT
= 0mA
⎯
1
μA
I
LEAK
Input Leakage Current V
EN
= 0V, OUT grounded
⎯
1
μA
V
Dro
p
out
Dropout Voltage (Note 5) I
OUT
= 150mA 150 300 mV
V
REF
ADJ Reference Voltage
(Adjustable
version)
I
OUT
= 0mA 0.4 V
I
ADJ
ADJ Leakage (Adjustable version)
⎯
1 μA
V
OUT
Output Voltage Accuracy
T
A
= -40
o
C to 85
o
C,
I
OUT
= 30mA
-2 2 %
ΔV
OUT
/ΔV
IN
/V
Line Regulation
V
IN
= (V
OUT
+1V) to V
IN-Max
,
V
EN
= V
IN
, I
OUT
= 1mA
0.01 0.20 %/V
ΔV
OUT
/V
OUT
Load Regulation
V
IN
= (V
OUT
+1V) to V
IN-Max
,
I
OUT
from 1mA to 150mA
-0.6 0.6 %
t
ST
Start-up Time
V
EN
= 0V to 2.0V, V
OUT
= 1.8V
I
OUT
= 150mA
80 μs
PSRR
PSRR
V
IN
= [V
OUT
+1V]V
DC
+ 0.5V
ppAC
,
f = 100Hz, I
OUT
= 30mA
65 dB
I
SHORT
Short-circuit Current V
IN
= V
IN-Min
to V
IN-Max
, V
OUT
< 0.2V 50 mA
I
LIMIT
Current Limit
V
IN
= (V
OUT
+1V) to V
IN-Max
,
V
OUT
/R
OUT
= 0.5A
200 300 mA
V
IL
EN Input Logic Low Voltage V
IN
= V
IN-Min
to V
IN-Max
0.4 V
V
IH
EN Input Logic High Voltage V
IN
= V
IN-Min
to V
IN-Max
1.4 V
I
EN
EN Input Current V
IN
= 0V or V
IN-Max
-1 1 μA
T
SHDN
Thermal Shutdown Threshold 140
°C
T
HYS
Thermal Shutdown Hysteresis 15
°C
θ
JA
Thermal Resistance
Junction-to-Ambient
SOT25 (Note 6) 190
o
C/W
Notes: 5. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value.
This parameter only applies to output voltages above 1.8V.
6. Test conditions for SOT25: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2oz copper, single sided