CS8161 Datasheet, PDF (5/8 Pages) Cherry Semiconductor Corporation – 12V, 5V Low Dropout Dual Regulator with ENABLE

Typical Performance Characteristics: continued
Dropout Voltage vs. Output Current for V_OUT2
800
750 ^{VIN = 4.0V}
700
No Load on V_OUT1
125°C
650
600
-40°C
550
500
450
350
25°C
300
250
200
150
100
50
0
0 25 50 75 100 125 150 175 200 225 250
Output Current (mA)
Quiescent Current vs. Output Current @ Dropout for V_OUT2
60
V_IN = 4.0V
55
50
45
40
35
30
25
20
15
10
5
0
0
25 50
-40°C
125°C
25°C
75 100 125 150 175 200 225 250
Output Current (mA)
Enable Threshold Voltage vs.
Temperature
1.305
1.300
VIN = 14.0V
1.295
1.290
1.285
-40 -20
0 20 40 60 80 100 120 140
Temperature (Deg. C)
ENABLE Current vs. ENABLE Voltage
Cursor ( 1.8500V, 253.9nA.)
Marker ( 1.8500V, 253.9nA.)
100
80
60
40
20
0
0
1
2
3
4
5
V_ENABLE (V)
12mA ENABLE Current vs.
ENABLE Voltage
5.0
4.0
3.0
2.0
1.0
0.0
0.0
5
10
15
20
25
V_ENABLE
Definition of Terms
Dropout Voltage: The input-output voltage differential at
which the circuit ceases to regulate against further
reduction in input voltage. Measured when the
output voltage has dropped 100mV from the nom-
inal value obtained at 14V input, dropout voltage
is dependent upon load current and junction tem-
perature.
Input Voltage: The DC voltage applied to the input termi-
nals with respect to ground.
Input Output Differential: The voltage difference
between the unregulated input voltage and the
regulated output voltage for which the regulator
will operate.
Line Regulation: The change in output voltage for a
change in the input voltage. The measurement is
made under conditions of low dissipation or by
using pulse techniques such that the average chip
temperature is not significantly affected.
Load Regulation: The change in output voltage for a
change in load current at constant chip tempera-
ture.
Long Term Stability: Output voltage stability under accel-
erated life-test conditions after 1000 hours with
maximum rated voltage and junction temperature.
Output Noise Voltage: The rms AC voltage at the output,
with constant load and no input ripple, measured
over a specified frequency range.
Quiescent Current: The part of the positive input current
that does not contribute to the positive load cur-
rent. i.e., the regulator ground lead current.
Ripple Rejection: The ratio of the peak-to-peak input rip-
ple voltage to the peak-to-peak output ripple volt-
age.
Temperature Stability of V_OUT: The percentage change in
output voltage for a thermal variation from room
temperature to either temperature extreme.
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