Page No. : 1/8
RS78L05
RS78L12
3-Terminal Positive Voltage Regulators
RS78LXX Series Pin Assignment
3-Lead Plastic
SOT-89
Package Code: M
Pin 1: V
OUT
Pin 2: GND
Pin 3: V
IN
3-Lead Plastic
TO-92
Package Code: A
Pin 1: V
OUT
Pin 2: GND
Pin 3: V
IN
12
3
1
2
3
Description
These regulators employ internal current-limiting and thermal-shutdown, making
them essentially indestructible. They can deliver up to 100mA output current.
Features
Maximum Output Current of 100mA (T
C
=25C)
Internal Short-Circuit Current Limiting
Internal Thermal Overload Protection
TO-92 & SOT-89 Package
Typical Application
Absolute Maximum Ratings
(T
A
=25C, Unless Otherwise Specified)
Characteristic
Input Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Junction Temperature
Thermal Resistance
Symbol
V
IN
P
D
T
opr
T
stg
T
j
R
th(j-a)
TO-92
SOT-89
-40 to 125
-65 to 150
150
208
o
Rating
30
700
500
Unit
V
mW
mW
o
o
o
C
C
C
Note 1: C
IN
is required if regulator is located an
appreciable distance from power supply filter.
Note 2: C
OUT
is not needed for stability;
however, it does improve transient response.
Values of less than 0.1uF could cause
instability.
C/W
Schematic Diagram & Equivalent Circuit
Schematic Diagram
Equivalent Circuit
V
IN
Input
3
Series
Pass
Element
Current
Generator
SOA
Protection
Output
1
Starting
Circuit
Reference
Voltage
Error
Amplifier
Thermal
Protection
V
OUT
GND
2
DS-RS78L05_12-05 February, 2007
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Page No. : 2/8
RS78L05 Electrical Characteristics
V
IN
=10V, I
OUT
=40mA, C
IN
=0.33uF, C
OUT
=0.1uF, 0CT
j
125C
(unless otherwise specified)
RS78L05AM/AA
Min
4.85
4.85
-
-
-
-
-
-
o
Symbol
Parameter
T
j
=25C
Conditions
Typ
5
5
15
15
5
8
3.9
-
-
40
62
1.7
150
Max
5.15
5.15
150
100
60
30
6
1.5
0.1
-
-
2.5
Units
V
O
Output Voltage
1mAI
OUT
70mA
7VV
IN
20V,
1mAI
OUT
40mA
T
j
=25C, 7VV
IN
20V
T
j
=25C, 8VV
IN
20V
T
j
=25C, 1mAI
OUT
100mA
T
j
=25C, 1mAI
OUT
40mA
I
OUT
=5mA, T
j
=25C
8VV
IN
20V,
T
j
=25 C
o
V
Reg
line
Line Regulation
mV
Reg
load
I
B
I
B
V
N
RR
V
D
Load Regulation
Quiescent Current
Quiescent Current
Change
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Peak Output Current
Output Resistance
Average Temperature
Coefficient of Output
Voltage
mV
mA
mA
uVrms
dB
V
mA
1mAI
OUT
40mA,
T
j
=25 C
10Hzf100KHz, T
j
=25C
8VV
IN
18V,
f=120Hz, T
j
=25 C
o
-
-
47
-
T
j
=25C, I
OUT
=100mA
I
PK
R
O
T
CVO
f=1KHz
I
OUT
=5mA
-
-
17
-
-
-0.6
m
mV/C
DS-RS78L05_12-05 February, 2007
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Page No. : 3/8
RS78L12 Electrical Characteristics
V
IN
=19V, I
OUT
=40mA, C
IN
=0.33uF, C
OUT
=0.1uF, 0CT
j
125C
(unless otherwise specified)
RS78L12AM/AA
Min
11.64
11.64
-
-
-
-
-
o
Symbol
Parameter
T
j
=25C
Conditions
Typ
12
12
15
15
20
10
3.9
-
-
80
54
1.7
150
Max
12.36
12.36
150
100
100
50
6
1.5
0.1
-
-
2.5
Units
V
O
Output Voltage
1mAI
OUT
70mA
14.5VV
IN
27V,
1mAI
OUT
40mA
T
j
=25C, 14.5VV
IN
27V
T
j
=25C, 16VV
IN
27V
T
j
=25C, 1mAI
OUT
100mA
T
j
=25C, 1mAI
OUT
40mA
I
OUT
=5mA, T
j
=25C
16VV
IN
27V,
T
j
=25 C
1mAI
OUT
40mA,
T
j
=25 C
o
V
Reg
line
Line Regulation
mV
Reg
load
I
B
I
B
V
N
RR
V
D
Load Regulation
Quiescent Current
Quiescent Current
Change
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Peak Output Current
Output Resistance
Average Temperature
Coefficient of Output
Voltage
mV
mA
mA
uVrms
dB
V
mA
-
-
-
o
10Hzf100KHz, T
j
=25C
15VV
IN
25V,
f=120Hz, T
j
=25 C
T
j
=25C, I
OUT
=100mA
41
-
I
PK
R
O
T
CVO
f=1KHz
I
OUT
=5mA
-
-
17
-
-
-1.4
m
mV/C
DS-RS78L05_12-05 February, 2007
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Page No. : 4/8
Test Circuits
Application Circuits
Constant Current Regulator
Circuit for Increasing Output Voltage
V
OUT
=V
OUT(IC)
+V
Z
I
1
=V
OUT(IC)
/R
1
V
OUT
=V
OUT(IC)
(1+R
2
/R
1
)+R
2
*I
B
Adjustable Output Regulator
High Output Current with Short-circuit Protection
V
OUT
=V
OUT(IC)
(1+R
2
/R
1
)
R
1
V
BE1
/I
B(max)
R
SC
=V
BE2
/I
SC
, I
SC
: Short-Circuit Current
DS-RS78L05_12-05 February, 2007
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Page No. : 5/8
Characteristics Curve
Ripple Rejection
70
60
Current Cut-off Grid Voltage
V
O
Ripple Rejection (dB)
..
.
50
40
30
20
10
0
10
100
1000
10000
100000
1000000
V
in
=(4.5+V
out(ic)
)V
DC
+3.5V
rms
I
out
=40mA
T
j
=25
o
C
Output Voltage (V)
T
j
=25℃
0.0
0.05
0.1
Output Current (A)
0.15
0.2
Frequency (Hz)
Worst Case Power Dissipation
(TO-92 Package)
400
2
Output Voltage as a Function of Junction
Temperature
Output Current (mA)
300
1
Output Voltage (V)
200
0
100
-1
Io=5mA
0
0
5
10
15
20
25
30
35
-2
0
50
100
150
o
200
Vinput-Voutput Voltage (V)
Junction Temperature ( C)
Load Transient Response
3.0
2.5
100
50
0
Load Current (mA)
Voltage Range
Output Voltage Deviation (V)
..
.
V
O
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
0
5
10
15
20
25
30
35
40
45
Vin=Vout(ic)+5V
o
Tj=25 C
50
0
5
10
15
20
25
30
35
Time (uS)
Voutput (V)
Vinput-Voutput (V)
DS-RS78L05_12-05 February, 2007
www.Orister.com
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