CS8127
Package Lead Description
PACKAGE LEAD #
LEAD SYMBOL
FUNCTION
8L SO & PDIP
1
2
3
4
5
6
7
8
V
IN
Sense
Delay
RESET
Ref Gnd
Pullup
Pwr Gnd
V
OUT
Unregulated supply voltage to the IC.
Kelvin connection which allows remote sensing of output volt-
age for improved regulation.
Timing CAP for RESET function
CMOS/TTL compatible open collector output. RESET goes low
whenever V
OUT
drops below 6% of it's typical value.
Ground connection
Internal pullup transistor for V
OUT
. Also Sense pin for
overvoltage shutdown.
Ground connection
Supplies base current to PNP pass transistor or threshold volt-
age to FET pass transistor.
Typical Performance Characteristics (per Test Circuit)
Temperature Performance of V
OUT
5.02
5.01
5
V
OUT
(V)
4.99
4.98
4.97
4.96
4.95
-40 -20 0 20 40 60 80 100120 140150
JUNCTION TEMPERATURE (°C)
RESET Voltage vs. Output Current
2000
1800
RESET OUTPUT VOLTAGE (mV)
Dropout Voltage vs. I
OUT
400
350
DROPOUT VOLTAGE (mV)
300
250
200
150
100
50
0
0
0.5
1.0
1.5
2.0
I
OUT
(Amps)
2.5
3.0
ROUT = 47W
I
OUT
=500mA
5.00V @ 25°C
Vin = 5V
25°C
1600
1400
1200
1000
800
600
400
200
0
0
5
10
15
20
25
30
35
40
RESET OUTPUT CURRENT (mA)
V
OUT
vs. V
IN
5.50
5.00
4.50
4.00
V
OUT
(V)
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00
0
1
2
3
4
5
6
V
IN
(V)
7
8
9
10
I
Q
vs. V
IN
100.00
90.00
80.00
70.00
IQ (mA)
IQ (mA)
40
25°C
I
Q
vs. I
OUT
35
30
VIN=14V
25
20
15
10
5
I
OUT
= 3A
R
OUT
= 47W
I
OUT=0.5A
I
OUT
= 3A
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0
1
2
3
4
I
OUT
= 0.5A
R
OUT
= 330W
5
6
VIN (V)
7
8
9
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
IOUT (Amps)
Line Regulation vs. I
OUT
20
LINE REGULATION (mV)
15
10
20
LOAD REGULATION (mV)
Load Regulation vs. I
OUT
80
25°C
VIN=14V
18
16
14
12
10
8
6
4
2
Ripple Rejection
25°C
70
VIN / VOUT(dB)
60
50
40
30
20
10
IOUT=250mA
25°C
6V£V
IN
£-
26V
5
0
0
0
0.5
1.0
1.5
2.0
I
OUT
(Amps)
2.5
3.0
0
0.5
1.0
1.5
IOUT(Amps)
2.0
2.5
3.0
0
10
100
1K
10K
100K
1M
10M
100M
FREQUENCY (Hz)
3
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
