ACT5880
Rev 2, 03-Sep-13
LOW-NOISE LDO ELECTRICAL CHARACTERISTICS
(VINL = 3.6V, TA = 25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Operating Voltage Range
Output Programming Range
VINL
2.4
6
V
0.6
-1.5
-2.5
3.9
TA = 25°C
+1.5
+2.5
Output Voltage Accuracy
LOWIQ[ ]=0
%
TA = -40°C to 85°C
Line Regulation
Load Regulation
VINL = (VOUT + 0.5V) to 5.5V
1
%/V
%/A
Load=1mA to maximum load current.
0.03
-80
C
OUT=1μF,
Load=20mA,
Power Supply Rejection Ratio VOUT=1.8V, REG5,
At 1kHz, LOWIQ[ ]=Any
LOWIQ[ ]=0
At 10kHz.
-70
-60
dB
A
(PSRR)
REG6, REG9,
REG10, REG11,
REG12,REG13
LOWIQ[ ]=1
REG4, REG6, REG7, REG8
REG5, REG9, REG12
REG10, REG13
0.36
0.25
0.15
0.08
Maximum Load Current
REG11
REG4, REG6, REG7, REG8
0.41
0.28
0.68
0.47
When 5% Voltage
drop is seen from
the normal output
voltage.
REG5, REG9, REG12
Current Limit
A
REG10, REG13
REG11
0.17
0.09
0.28
0.15
0.22
Set load current to 1/4 of max output current;
Ramp down input supply until VOUT=VSET - 100mV.
Dropout Voltage
140
mV
REG5, REG6, REG9, REG10, REG11, REG12,
REG13, COUT=1μF, Load=20mA, VOUT=1.8V,
LOWIQ[ ]=0
Output Noise
30
µVRMS
From the I2C last bit latched or PWRHLD, ON6 or
ON9 set 1 to output changes.
Turn-On Propagation Delay
Soft-Start Ramp Time
150
μs
Time between 2 intersection points of the ramp
slope and 2 voltages; 0% and 100% of the final,
no and full load.
30
150
OK Threshold to Normal Ratio OK[ ] asserts 0
89
45
%
Current Limit Fold-Back Ratio Ratio to the current limit, when output short circuit.
Discharge Resistance
LDO Disabled, DIS[ ] = 1
REG4, REG6, REG7, REG8
REG5, REG9, REG12
REG10, REG13
REG11
kꢀ
1.5
3.3
2.2
1.5
1
20
20
20
20
Stable COUT Range
μF
μA
LOWIQ[ ]=0
22
15
No Load Current
Shutdown Current
LOWIQ[ ]=1
1
Note: See the TYPICAL PERFORMANCE CHARACTERISTICS for:
The REG4 Start up Waveform, No Load; The REG4 Start up Waveform, Full Load;
The REG4 voltage step transition response; The REG4 Load Transition Response.
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