Diodes AP7168 - Manual (Page 3)

AP7168
1.2A LOW DROPOUT REGULATOR WITH POK
AP7168
Document number: DS32019 Rev. 2 - 2
3 of 11
www.diodes.com
September 2010
© Diodes Incorporated
NEW PROD
UC
T
Electrical Characteristics
(T
A
= 25 o C, V
IN
= V
OUT
+1V, C
IN
= 1 μF, C
OUT
= 1 μF, V
EN
= 2V, unless otherwise stated)
Symbol Parameter Test Conditions Min Typ. Max Unit
I
Q
Input Quiescent Current I
OUT
= 0 ⎯ 125 180 µA
I
SHDN
Input Shutdown Current V
EN
= 0V, I
OUT
= 0 (Note 3) -1 0.1 1 µA
V
Dropout
Dropout Voltage
V
OUT
≥ 1.5V, I
OUT
= 0.5A 230 mV
V
OUT
≥ 1.5V, I
OUT
= 1A 500 800 mV
V
REF
FB reference voltage 0.8 V
I
FB
FB leakage ⎯ 0.01 1 µA
V
OUT
Output Voltage Total Accuracy -3 3 %
OUT
IN
OUT
V
ΔV
ΔV
/
Line Regulation
V
IN
= V
OUT
+1V to 5.5V,
I
OUT
= 1mA
0.02 %/V
ΔV
OUT
/ V
OUT
Load Regulation I
OUT
from 1mA to 1A -1.5 1.5 %
t
ST
Start-up Time, from EN high to POK
high V
EN
= 0V to 2.0V, I
OUT
= 100mA,
V
IN
= 3.3V
190 µs
PSRR Power Supply Rejection Ratio
1kHz, V
IN
= 3.3V, V
OUT
= 1.2V,
I
OUT
= 100mA
60 dB
I
LIMIT
Current limit V
OUT
= 1.8V, R
OUT
= 0.5
Ω 1.2 1.6 A
I
SHORT
Short-circuit Current V
IN
= 3.3V, V
OUT
< 0.2V 750 mA
V
IL
EN Input Logic Low Voltage 0.4 V
V
IH
EN Input Logic High Voltage 1.4 V
I
EN
EN Input leakage V
EN
= 0V or 5.5V
⎯
0.01 1 µA
V
OL
POK output low voltage Force 2mA 100 200 mV
V
POK_TH_UP
Output voltage (rising) POK threshold
FB (or OUT for fixed version)
rising
87% 92% 97% V
ref
V
POK_Hys
Output voltage POK hysteresis 4% V
ref
POK deglitch V
IN
= 3.3V, V
OUT
= 1.2V 160 µs
I
POK_LK
POK leakage current V
POK
= 5.5V
⎯
0.01 1 µA
T
SHDN
Thermal shutdown threshold 145
°C
T
HYS
Thermal shutdown hysteresis 25
°C
θ
JA
Thermal Resistance Junction-to-
Ambient
SOP-8L-EP (Note 4) 27 o C/W
Notes: 3. POK pin must be disconnected from IN pin.
4 . Test condition for SO-8EP: Device mounted on 2" x 2" FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top
layer and thermal vias to bottom layer ground plane.