
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR AP2128
Data Sheet
7
Sept. 2010 Rev. 2.0 BCD Semiconductor Manufacturing Limited
Parameter Symbol Conditions Min Typ Max Unit
Output Voltage
V
OUT
V
IN
=2.5V
1mA≤I
OUT
≤300mA
98%×
V
OUT
102%×
V
OUT
V
Input Voltage V
IN
2.5 6 V
Maximum Output Current
I
OUT(MAX)
V
IN
=2.5V,
V
OUT
=98%×V
OUT
300 400 mA
Current Limit
I
LIMIT
V
IN
=2.5V
450 mA
Load Regulation
∆V
OUT
/(∆I
OUT*
V
OUT
)
V
IN
=2.5V,
1mA≤I
OUT
≤300mA
0.6 %/A
Line Regulation
∆V
OUT
/(∆V
IN
*V
OUT
)
V
IN
=2.5V to 6V
I
OUT
=30mA
0.06 %/V
Dropout Voltage
V
DROP
V
OUT
=1.0V, I
OUT
=300mA 1400 1500
mV
V
OUT
=1.2V, I
OUT
=300mA 1200 1300
V
OUT
=1.5V, I
OUT
=300mA 900 1000
V
OUT
=1.8V, I
OUT
=300mA 600 700
Quiescent Current I
Q
V
IN
=2.5V, I
OUT
=0mA 60 90 µA
Standby Current
I
STD
V
IN
=2.5V,
V
SHUTDOWN
in off mode
0.1 1.0 µA
Power Supply
Rejection Ratio
PSRR
Ripple 1Vp-p
V
IN
=3V
f=100Hz 68 dB
f=1KHz 68 dB
f=10KHz 54 dB
Output Voltage
Temperature Coefficient
(∆V
OUT
/V
OUT
)
/∆T
I
OUT
=30mA,
-40
o
C
≤
T
A
≤
85
o
C
±100
ppm/
o
C
Short Current Limit I
SHORT
V
OUT
=0V 50 mA
Soft Start Time t
UP
50 µs
Shutdown
"High" Voltage Shutdown input voltage "High" 1.5 6 V
Shutdown
"Low" Voltage Shutdown input voltage "Low" 0 0.4 V
V
OUT
Discharge MOSFET
R
DS(ON)
Shutdown input voltage "Low" 60 Ω
Shutdown Pull Down Resis-
tance
3MΩ
Thermal Shutdown 165
o
C
Thermal Shutdown Hysteresis 30
o
C
Thermal Resistance
θ
JC
SOT-23-5 150
o
C/W
(AP2128-1.0V/1.2V/1.5V/1.8V, V
IN
min.=2.5V, C
IN
=1µF, C
OUT
=1µF,
Bold typeface applies over
-40
o
C
≤
T
A
≤
85
o
C,
unless oth-
erwise specified.)
Electrical Characteristics (Continued)
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