CS8121
Package Lead Description
PACKAGE LEAD #
LEAD SYMBOL
FUNCTION
7 Lead
D
2
PAK
1
2
3
4
5
5 Lead TO-220 &
Overmolded TO-220
NC
1
2
3
4
V
IN
ENABLE
Gnd
RESET
No Connection.
Supply voltage to IC, usually direct from the battery.
CMOS compatible logical. V
OUT
is disabled i.e. placed in a
high impedance state when ENABLE is high.
Ground connection.
CMOS compatible output lead. RESET goes low whenever
V
OUT
falls out of regulation. The RESET delay is externally
programmed.
Regulated output voltage, 5V (typ).
Remote sensing of output voltage.
6
7
5
V
OUT
V
OUT(SENSE)
Typical Performance Characteristics
Output Voltage vs. Temperature
5.02
Load Regulation vs. Output Current Over Temperature
0
I
OUT
= 100mA
5.01
-5
-10
-15
Load Reg. (mV)
-20
-25
-30
-35
-40
-45
V
IN
=14V
125
°
C
Ð40
°
C
5.00V @ 25ûC
V
OUT
(V)
5
4.99
4.98
4.97
4.96
4.95
-40
25
°
C
-20
0
20
40
60
80
100
120 140 150
-50
0
200
400
I
OUT
(A)
600
800
1A
Junction Temperature (ûC)
Line Regulation vs. Output Current Over Temperature
Dropout Voltage vs. Output Current Over Temperature
1.5
50
V
IN
= 7 to 26V
40
Line Reg. (mV)
Dropout Voltage (V)
1.4
1.3
1.2
30
20
125ûC
10
-40ûC
0
-10
0
0.2
0.4
0.6
0.8
1A
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
0.1
0.2
0.3
0.4
0.5
0.6
I
OUT
(A)
0.7
0.8
0.9
1.0
-40°C
25°C
125°C
25ûC
I
OUT
(A)
3
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
