CYStech Electronics Corp.
Spec. No. : C519A3
Issued Date : 2003.03.26
Revised Date : . .
Page No. : 1/4
PL78L12A3
CYStek Product Specification
Three Terminal Low Current Positive Voltage Regulators
PL78L12XA3
Description
These regulators employ internal current-limiting and thermal-shutdown,
making them essentially indestructible. They can deliver up to 100mA
output current. if the case temperature can keep in Tc=25
C.
They are intended as fixed voltage regulators in a wide range of appli-
cations including local (on-card) regulation for elimination of noise and
distribution problems associated with single-point regulation. In addition,
they can be used with power pass elements to make high-current
voltage regulators. The PL78L12 used as a Zener diode/resistor com-
bination replacement, offers an effective output impedance improvement
of typically two orders of magnitude, along with lower quiescent current
and lower noise.
Absolute Maximum Ratings
(Ta=25
C)
Input Voltage............................................................................................................. 35 V
Total Power Dissipation............................................................................... Internally limited
Operating Temperature Range...................................................................... 0
C to +125
C
Maximum Junction Temperature.................................................................................125
C
Storage Temperature Range........................................................................-55
C to +150
C
Lead Temperature (Soldering 10S)......................................
....................................260
C
Schematic Diagram
Typical Application
TO-92
1.9k
Gnd
576
3.41k
3.89k
7.8k
13k
2.84k
5.7k
100
100
Vin
Vout
2.23k
1.5k
5k
5p
PL78L12
Vout
Vin
C1 C2
Note:
C1 and C2 are required if regulator is
located far from power supply filter
and load, or oscillation may induced
on the loop.
CYStech Electronics Corp.
Spec. No. : C519A3
Issued Date : 2003.03.26
Revised Date : . .
Page No. : 2/4
PL78L12A3
CYStek Product Specification
Ordering Information
Device
Output Voltage Tolerance
PL78L12AA3 3%
PL78L12BA3 5%
Electrical Characteristics
Vin=19V, Iout=40mA, 0
C
Tj
125
C, Cin=0.33uF, Cout=0.1uF (unless otherwise noted)
PL78L12A
Symbol Parameter
Conditions
Min Typ Max
Units
Tj=25
C
11.64 12 12.36
1mA
Io
70mA
11.64 - 12.36
Vo Output
Voltage
1mA
Io
40mA and
14.5V
Vin
27V
11.64 - 12.36
V
Tj=25
C, 16V
Vin
27V
- 20
100
Vo
Line Regulation
Tj=25
C, 14.5V
Vin
27V
- 30
180
mV
Tj=25
C, 1mA
Io
40mA
- 10 50
Vo
Load Regulation
Tj=25
C, 1mA
Io
100mA
- 30
100
mV
IQ Quiescent
Current Tj=25
C
- 3 5
mA
1mA
Io
40mA
- - 0.1
IQ
Quiescent Current
Change
16V
Vin
27V
- - 1
mA
Vn
Output Noise Voltage
Ta=25
C, 10Hz
f
10KHz
- 80 -
uV
Vin /
Vout Ripple Rejection
f=120Hz
40
54
-
dB
VD Dropout
Voltage
Tj=25
C
- 1.7 - V
Input Voltage
Require To Maintain
Line Regulation
Tj=25
C
14.5 - - V
PL78L12B
Symbol Parameter
Conditions
Min Typ Max
Units
Tj=25
C
11.5 12 12.5
1mA
Io
70mA
11.4 - 12.6
Vo Output
Voltage
1mA
Io
40mA and
14.5V
Vin
27V
11.4 - 12.6
V
Tj=25
C, 16V
Vin
27V
- 20
100
Vo
Line Regulation
Tj=25
C, 14.5V
Vin
27V
- 30
180
mV
Tj=25
C, 1mA
Io
40mA
- 10 50
Vo
Load Regulation
Tj=25
C, 1mA
Io
100mA
- 30
100
mV
IQ Quiescent
Current Tj=25
C
- 3 5
mA
1mA
Io
40mA
- - 0.1
IQ
Quiescent Current
Change
16V
Vin
27V
- - 1
mA
Vn
Output Noise Voltage
Ta=25
C, 10Hz
f
10KHz
- 80 -
uV
Vin /
Vout Ripple Rejection
f=120Hz
40
54
-
dB
VD Dropout
Voltage
Tj=25
C
- 1.7 - V
Input Voltage
Require To Maintain
Line Regulation
Tj=25
C
14.5 - - V
CYStech Electronics Corp.
Spec. No. : C519A3
Issued Date : 2003.03.26
Revised Date : . .
Page No. : 3/4
PL78L12A3
CYStek Product Specification
Characteristic Curves
Dropout Characteristics
1
2
3
4
5
6
0
1
2
3
4
5
6
7
8
9 10
Input Voltage(V)
Output
Voltage(V)
Io=100mA
Io=1mA
Io=40mA
Maximum Average Power Dissipation
100
1000
10000
25
50
75
100
125
150
Ambient Temperature (C)
Power Dissipation (mW)
Quiescent Current
0
0.5
1
1.5
2
2.5
3
3.5
4
0
5
10
15
20
25
30
35
Input Voltage(V)
Quiescent Current(mA)
Quiescent Current
2.6
2.8
3
3.2
3.4
0
50
100
150
Ambient Temperature(C)
Quiescent Current(mA)
CYStech Electronics Corp.
Spec. No. : C519A3
Issued Date : 2003.03.26
Revised Date : . .
Page No. : 4/4
PL78L12A3
CYStek Product Specification
TO-92 Dimension
*: Typical
Inches Millimeters
Inches Millimeters
DIM
Min. Max. Min. Max.
DIM
Min. Max. Min. Max.
A 0.1704
0.1902 4.33 4.83 G 0.0142 0.0220 0.36 0.56
B 0.1704
0.1902 4.33 4.83 H
-
*
0.1000 -
*
2.54
C 0.5000 - 12.70 -
I
-
*
0.0500 -
*
1.27
D 0.0142
0.0220 0.36 0.56
1
-
*
5
-
*
5
E -
*
0.0500 -
*
1.27
2
-
*
2
-
*
2
F 0.1323
0.1480 3.36 3.76
3
-
*
2
-
*
2
Notes:
1.Controlling dimension: millimeters.
2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.
Material:
Lead: 42 Alloy ; solder plating
Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
Important Notice:
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek.
CYStek reserves the right to make changes to its products without notice.
CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems.
CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
78L12
3
1
A
D
B
C
I
1
E
F
2
3
G
H
2
Style: Pin 1.Vout 2.GND 3.Vin
3-Lead TO-92 Plastic Package
CYStek Package Code: A3
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