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www.fairchildsemi.com
KA76L05
Low Dropout Voltage Regulator
Features
•
•
•
•
Limited input voltage and high efficiency.
Internal thermal over load protection.
60V load dump protection.
Output current up to 0.1A.
Description
KA76L05 is a fixed 3-terminal low dropout voltage
regulator designed to need very low quiescent current.
Internally, implemented circuits include 60V load dump
protection, -50V reverse transient short circuit and thermal
over load protection.
TO-92
1
1: Output 2: GND 3: Input
Internal Block Diagram
0.6V MAX DROP
Input
V
I
3
PASS ELEMENT
Output
V
O
1
OVER VOLTAGE
PROTECTION
CURRENT LIMIT
START
_
THERMAL SHUTDOWN
REFERENCE VOLTAGE
GND
2
©2001 Fairchild Semiconductor Corporation
+
Rev. 1.0.0
KA76L05
Typical Perfomance Characteristics
FIG.1
7
Output Voltage
vs.
Input Voltage
10
FIG.2
Quiescent current Iq(mA)
Quiescent
vs. Input Voltage
Output voltage Vo(V)
6
5
4
3
2
1
0
0
5
10
15
8.0
6.0
4.0
R
L
= 50
Ω
2.0
R
L
= 500
Ω
0
0
10
20
30
40
50
Input voltage Vin (V)
Input voltage Vin (V)
Figure 1. Output Voltage vs. Input Voltage
Figure 2. Quiescent Current vs. Input Voltage
FIG.3 Ripple Rejection
vs. Output Voltage
Ripple Rejection Ratio(㏈)
FIG.4
Dropout voltage Vdrop(㎷)
240
200
160
120
80
40
Drop Voltage
vs. Output Current
90
85
VIN
=
14V
△
V
OUT
= 100
㎷
T
J
= 25
℃
75
V
IN
= 14V
V
OUT
= 5.0V
f = 120
㎐
T
J
= 25
℃
65
0
20
40
60
80
100
0
0
20
40
60
80
100
120
Output Current (㎃)
Output Current (㎃)
Figure 3. Ripple Rejection vs. Output Voltage
Figure 4. Drop Voltage vs. Output Current
FIG.5 Output Voltage
vs. Temperature(Tj)
5.06
1
FIG.6
Quiescent Current
vs. Temperature(Tj)
Outout voltage Vo(V)
5.04
5.02
5.00
4.98
4.96
4.94
4.92
-25
Quiescent current Iq(mA)
0.8
0.6
0.4
0.2
0
0
25
50
75
100
125
-25
0
25
50
75
100
125
Temperature Tj(℃)
Junction temperature Tj(℃)
Figure 5. Output Voltage vs. Temperature(Tj)
Figure 6. Quiescent Current vs. Temperature(Tj)
3
Analogue and Mixed Signal
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