WEITRON
Positive Voltage Regulator
P b
Lead(Pb)-Free
General Description:
WT78LXX
The WT78LXX series of positive regulators are available in the SOP-8 package and with 5V, 6V, 8V, 9V, 10V,
12V, 15V, 18V and 24V fixed output voltages, making it useful in a wide range of applications. These regulators
can provide local on-card regulation, eliminating the distribution problems associated with single point
regulation. Each type employs internal current limiting, thermal shut-down and safe operating area protection,
making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 100mA output
current. Although designed primarily as fixed voltage regulators, these devices can be used with external
components to obtain adjustable voltages and currents. WT78LXX is characterized for operation from 0°C to
+125°C.
Features:
* Internal Short-Circuit Current Limiting.
* Internal Thermal Overload Protection.
* No External Components Required.
Connection Diagrams
SOP-8
Package
(Top View)
SOT-89
Package
(Top View)
TO-92
Package
(Top View)
Vout
5V:05
6V:06
8V:08
9V:09
10V:10
12V:12
15V:15
18V:18
24V:24
GND
Vin
8 7 6 5
Date Code
78LXX
XXXX
1 2 3 4
Vout
GND
Vout
5V:05
6V:06
8V:08
9V:09
10V:10
12V:12
NC
15V:15
GND
18V:18
24V:24
GND
NC
Date Code
Vout
5V:05
6V:06
78LXX
8V:08
XXXX
9V:09
10V:10
12V:12
Vin 15V:15
Gnd
18V:18
24V:24
Vout
Date Code
78LXX
XX
X
Vout
GND
Vin
Typical Application
Vin
Vout
WT78LXX
Gnd
Cin
0.33µF
Cout
0.1µF
WEITRON
hpp://www.weitron.com.tw
1/10
23-Mar-07
WT78LXX
Ordering Information
Ordering Number Output Voltage
WT78L05G
WT78L05K
WT78L05M
WT78L06G
WT78L06K
WT78L06M
WT78L08G
WT78L08K
WT78L08M
WT78L09G
WT78L09K
WT78L09M
WT78L10G
WT78L10K
WT78L10M
WT78L12G
WT78L12K
WT78L12M
WT78L15G
WT78L15K
WT78L15M
WT78L18G
WT78L18K
WT78L18M
WT78L24G
WT78L24K
WT78L24M
Package
TO-92
SOT-89
SOP-8
TO-92
SOT-89
SOP-8
TO-92
SOT-89
SOP-8
TO-92
SOT-89
SOP-8
TO-92
SOT-89
SOP-8
TO-92
SOT-89
SOP-8
TO-92
SOT-89
SOP-8
TO-92
SOT-89
SOP-8
TO-92
SOT-89
SOP-8
Shipping
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
500 Units/Bag
1,000 Units/Tape&Reel
3,000 Units/Tape&Reel
5V
5V
5V
6V
6V
6V
8V
8V
8V
9V
9V
9V
10V
10V
10V
12V
12V
12V
10V
10V
10V
12V
12V
12V
24V
24V
24V
http://www.weitron.com.tw
WEITRON
2/10
23-Mar-07
WT78LXX
Absolute Maximum Ratings
Parameter
WT78L05~10
Input Voltage
WT78L12~18
WT78L24
Output Current
Power Dissipation
Operating Junction Temperature Range
Storage temperature range
*When test in free air confition, without heat sinking.
Ratings
30
35
40
100
750*
0 ~ +125
-55 ~ +150
mA
mW
°C
°C
V
Unit
Electrical Characteristics
WT78L05
(Refer to the test circuits, Tj=0~125°C, I
O
=40mA, V
in
=10V, C
in
=0.33µF, C
O
=0.1µF unless otherwise specified)
Parameter
Output Voltage
V
in
=10V, I
O
=40mA, T
j
=25°C
7V ≤ V
in
≤ 20V, 1mA ≤ I
O
≤ 40mA
7V ≤ V
in
≤ V
max
, 1mA ≤ I
O
≤ 70mA (Note2)
Line Regulation
7V ≤ V
in
≤ 20V, I
O
=40mA, T
j
=25°C
8V ≤ V
in
≤ 20V, I
O
=40mA, T
j
=25°C
Load Regulation
V
in
= 10V, 1mA ≤ I
O
≤ 100mA, T
j
=25°C
V
in
= 10V, 1mA ≤ I
O
≤ 40mA, T
j
=25°C
Quiescent Current
V
in
= 10V, I
O
=0mA, T
j
=25°C
Quiescent Current Change
V
in
= 10V, 1mA ≤ I
O
≤ 40mA
8V ≤ V
in
≤ 20V, I
O
=40mA
Output Noise Voltage
10Hz ≤ f ≤ 100KHz
Ripple Rejection
8V ≤ V
in
≤ 20V, f=120Hz, T
j
=25°C
Dropout Voltage
I
O
= 100mA, T
j
=25°C
Temperature Coefficient of Output Voltage
I
O
= 5mA, 0°C ≤ T
j
≤ 125°C
Symbol
V
O
A-Rank(3%)
B-Rank(5%)
Min
4.85
4.75
-
-
-
-
-
-
-
-
47
-
-
Typ
5.0
-
18
10
20
5
3.0
-
-
40
62
1.7
-0.65
Max
5.15
5.25
75
54
60
30
5.0
0.1
1.0
-
-
-
-
Unit
V
V
O
V
O
I
Q
I
Q
V
n
RR
V
D
V
O
/ T
j
mV
mV
mA
mA
µV
dB
V
mV/°C
http://www.weitron.com.tw
WEITRON
3/10
23-Mar-07
WT78LXX
WT78L06
(Refer to the test circuits, Tj=0~125°C, I
O
=40mA, V
in
=12V, C
in
=0.33µF, C
O
=0.1µF unless otherwise specified)
Parameter
Symbol
A-Rank(3%)
B-Rank(5%)
Min
5.82
5.70
-
-
-
-
-
-
-
-
40
-
-
Typ
6.0
-
64
54
12.8
5.8
3.9
-
-
49
46
1.7
0.75
Max
6.18
6.30
175
125
80
40
6.0
0.1
1.5
-
-
-
-
Unit
V
Output Voltage
V
in
=12V, I
O
=40mA, T
j
=25°C
V
O
8.5V ≤ V
in
≤ 20V, 1mA ≤ I
O
≤ 40mA
8.5V ≤ V
in
≤ V
max
, 1mA ≤ I
O
≤ 70mA (Note2)
Line Regulation
8.5V ≤ V
in
≤ 20V, I
O
=40mA, T
j
=25°C
9V ≤ V
in
≤ 20V, I
O
=40mA, T
j
=25°C
Load Regulation
V
in
= 12V, 1mA ≤ I
O
≤ 100mA, T
j
=25°C
V
in
= 12V, 1mA ≤ I
O
≤ 70mA, T
j
=25°C
Quiescent Current
V
in
= 12V, I
O
=0mA, T
j
=25°C
Quiescent Current Change
V
in
= 12V, 1mA ≤ I
O
≤ 40mA
9V ≤ V
in
≤ 20V, I
O
=40mA
Output Noise Voltage
10Hz ≤ f ≤ 100KHz
Ripple Rejection
10V ≤ V
in
≤ 20V, f=120Hz, T
j
=25°C
Dropout Voltage
I
O
= 100mA, T
j
=25°C
Temperature Coefficient of Output Voltage
I
O
= 5mA, 0°C ≤ T
j
≤ 125°C
V
O
V
O
I
Q
mV
mV
mA
I
Q
V
n
RR
V
D
V
O
/ T
j
mA
µV
dB
V
mV/°C
WT78L08
(Refer to the test circuits, Tj=0~125°C, I
O
=40mA, V
in
=14V, C
in
=0.33µF, C
O
=0.1µF unless otherwise specified)
Parameter
Symbol
A-Rank(3%)
B-Rank(5%)
Min
7.76
7.60
-
-
-
-
-
-
-
-
39
-
-
Typ
8.0
-
10
8
15
8
2.0
-
-
49
45
1.7
0.75
Max
8.24
8.40
175
125
80
40
5.5
0.1
1.5
-
-
-
-
Unit
V
Output Voltage
V
in
=14V, I
O
=40mA, T
j
=25°C
V
O
10.5V ≤ V
in
≤ 23V, 1mA ≤ I
O
≤ 40mA
10.5V≤ V
in
≤ V
max
, 1mA≤ I
O
≤70mA (Note2)
Line Regulation
10.5V ≤ V
in
≤ 23V, I
O
=40mA, T
j
=25°C
11V ≤ V
in
≤ 23V, I
O
=40mA, T
j
=25°C
Load Regulation
V
in
= 14V, 1mA ≤ I
O
≤ 100mA, T
j
=25°C
V
in
= 14V, 1mA ≤ I
O
≤ 70mA, T
j
=25°C
Quiescent Current
V
in
= 14V, I
O
= 0mA, T
j
=25°C
Quiescent Current Change
V
in
= 14V, 1mA ≤ I
O
≤ 40mA
11V ≤ V
in
≤ 23V, I
O
= 40mA
Output Noise Voltage
10Hz ≤ f ≤ 100KHz
Ripple Rejection
11V ≤ V
in
≤ 21V, f=120Hz, T
j
=25°C
Dropout Voltage
I
O
= 100mA, T
j
=25°C
Temperature Coefficient of Output Voltage
I
O
= 5mA, 0°C ≤ T
j
≤ 125°C
V
O
V
O
I
Q
I
Q
V
n
RR
V
D
V
O
/ T
j
mV
mV
mA
mA
µV
dB
V
mV/°C
http://www.weitron.com.tw
WEITRON
4/10
23-Mar-07
WT78LXX
WT78L09
(Refer to the test circuits, Tj=0~125°C, I
O
=40mA, V
in
=15V, C
in
=0.33µF, C
O
=0.1µF unless otherwise specified)
Parameter
Output Voltage
V
in
=15V, I
O
=40mA, T
j
=25°C
11.5V ≤ V
in
≤ 24V, 1mA ≤ I
O
≤ 40mA
11.5V≤ V
in
≤V
max
, 1mA≤ I
O
≤70mA (Note2)
Line Regulation
11.5V ≤ V
in
≤ 24V, I
O
=40mA, T
j
=25°C
13V ≤ V
in
≤ 24V, I
O
=40mA, T
j
=25°C
Load Regulation
V
in
= 15V, 1mA ≤ I
O
≤ 100mA, T
j
=25°C
V
in
= 15V, 1mA ≤ I
O
≤ 40mA, T
j
=25°C
Quiescent Current
V
in
= 15V, I
O
=0mA, T
j
=25°C
Quiescent Current Change
V
in
= 15V, 1mA ≤ I
O
≤ 40mA
13V ≤ V
in
≤ 24V, I
O
=40mA
Output Noise Voltage
10Hz ≤ f ≤ 100KHz
Ripple Rejection
12V ≤ V
in
≤ 23V, f=120Hz, T
j
=25°C
Dropout Voltage
I
O
= 100mA, T
j
=25°C
Temperature Coefficient of Output Voltage
I
O
= 5mA, 0°C ≤ T
j
≤ 125°C
Symbol
V
O
A-Rank(3%)
B-Rank(5%)
Min
8.73
8.55
-
-
-
-
-
-
-
-
38
-
-
Typ
9.0
-
90
100
20
10
2.0
-
-
49
44
1.7
0.75
Max
9.27
9.45
200
150
90
45
6.0
0.1
1.5
-
-
-
-
Unit
V
V
O
V
O
I
Q
I
Q
V
n
RR
V
D
V
O
/ T
j
mV
mV
mA
mA
µV
dB
V
mV/°C
WT78L10
(Refer to the test circuits, Tj=0~125°C, I
O
=40mA, V
in
=17V, C
in
=0.33µF, C
O
=0.1µF unless otherwise specified)
Parameter
Output Voltage
V
in
=17V, I
O
=40mA, T
j
=25°C
13V ≤ V
in
≤ 25V, 1mA ≤ I
O
≤ 40mA
13V≤ V
in
≤V
max
, 1mA≤ I
O
≤70mA (Note2)
Line Regulation
13V ≤ V
in
≤ 25V, I
O
=40mA, T
j
=25°C
14V ≤ V
in
≤ 25V, I
O
=40mA, T
j
=25°C
Load Regulation
V
in
= 17V, 1mA ≤ I
O
≤ 100mA, T
j
=25°C
V
in
= 17V, 1mA ≤ I
O
≤ 40mA, T
j
=25°C
Quiescent Current
V
in
= 17V, I
O
=0mA, T
j
=25°C
Quiescent Current Change
V
in
= 17V, 1mA ≤ I
O
≤ 40mA
14V ≤ V
in
≤ 25V, I
O
=40mA
Output Noise Voltage
10Hz ≤ f ≤ 100KHz
Ripple Rejection
15V ≤ V
in
≤ 25V, f=120Hz, T
j
=25°C
Dropout Voltage
I
O
= 100mA, T
j
=25°C
Symbol
V
O
A-Rank(3%)
B-Rank(5%)
Min
9.70
9.50
-
-
-
-
-
-
-
-
37
-
Typ
10.0
-
51
42
20
11
4.2
-
-
62
44
1.7
Max
10.30
10.50
175
125
90
40
6.0
0.1
1.5
-
-
-
Unit
V
V
O
V
O
I
Q
I
Q
V
n
RR
V
D
mV
mV
mA
mA
µV
dB
V
http://www.weitron.com.tw
WEITRON
5/10
23-Mar-07
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