CYStech Electronics Corp.
3-TERMINAL NEGATIVE VOLTAGE REGULATOR
Spec. No. : C538E3
Issued Date : 2003.04.08
Revised Date :
Page No. : 1/4
PL7918XE3
Description
The PL7918XE3 series of three-terminal negative regulators are
available in the TO-220AB package. These regulators can provide
TO-220AB
local on-card regulation, eliminating the distribution problems
associated with single point regulation. Each employs internal current
limiting, thermal shutdown and safe operating area protection, making it essentially indestructible.
If adequate heat sinking is provided, they can deliver over 1A output current. Although designed
primarily as fixed voltage regulators, these devices can be used with external components to
obtain adjustable voltages and currents.
PL7918XE3 is characterized for operation from 0°C to +125°C, and if operating temperature is
always high, please refer to the power dissipation curve.
Absolute Maximum Ratings
(Ta=25°C)
•
Input Voltage ...................................................................................................................... -35 V
•
Total Power Dissipation .................................................................................... Internally limited
•
Operating Junction Temperature ....................................................................... 0
°C
to +125
°C
•
Maximum Junction Temperature ..................................................................................... 125
°C
•
Storage Temperature Range .......................................................................... -55
°C
to +150
°C
•
Lead Temperature (Soldering 10S) ................................................................................. 230
°C
Typical Application
Schematic Diagram
1.4k
GND
Vin
2
PL7918
1
3
Vout
4K
7K
5K
15K
C1
C2
3K
10K
Vout
6.2V
Note:
Bypass Capacitors are
recommended for optimum stability
and transient response and should
be located as close as possible to
the regulator.
750
Vin
1K
6K
20K
20K
20pF
10pF
600
15K
20K
20K
5K
150
0.2
PL7918E3
CYStek Product Specification
CYStech Electronics Corp.
Electrical Characteristics
Vin=-27V, Io=500mA, Cin=2.2uF, Cout=1uF, 0°C≤Tj≤125°C (unless otherwise noted)
Spec. No. : C538E3
Issued Date : 2003.04.08
Revised Date :
Page No. : 2/4
Symbol
Vo
∆Vo
∆Vo
IQ
∆IQ
∆Vo
/
∆T
Vn
RR
VD
Isc
Ipk
Symbol
Vo
∆Vo
∆Vo
IQ
∆IQ
∆Vo
/
∆T
Vn
RR
VD
Isc
Ipk
Parameter
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current
Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Output Current
Parameter
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current
Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Output Current
Conditions
Tj=25°C
P
D
≤15W,
5mA≤ I
O
≤
1A
-22V≥Vin≥ -33V
Tj=25°C, -21V
≥
Vin≥-33V
Tj=25°C, -24V≥Vin≥-30V
5mA≤ I
O
≤1.5A
250mA≤ I
O
≤750mA
I
O
≤1A,
Tj=25°C
5mA≤ I
O
≤1A
-22V≥Vin≥-33V
Io=5mA
Ta=25°C, 10Hz≤ f
≤100KHz
∆Vi=10V,
f=120Hz
Tj=25°C, I
O
=1A
Tj=25°C, V
in
=-35V
Tj=25°C
Conditions
Tj=25°C
P
D
≤15W,
5mA≤ I
O
≤
1A
-22V≥Vin≥ -33V
Tj=25°C, -21V
≥
Vin≥-33V
Tj=25°C, -24V≥Vin≥-30V
5mA≤ I
O
≤1.5A
250mA≤ I
O
≤750mA
I
O
≤1A,
Tj=25°C
5mA≤ I
O
≤1A
-22V≥Vin≥-33V
Io=5mA
Ta=25°C, 10Hz≤ f
≤100KHz
∆Vi=10V,
f=120Hz
Tj=25°C, I
O
=1A
Tj=25°C, V
in
=-35V
Tj=25°C
PL7918A
Min Typ Max
-17.64 -18 -18.36
-17.46
-
-
-
-
-
-
-
-
-
54
-
-
1.3
-18
-
-
-
-
3
-
-
-1
300
68
2
2.2
2.2
-18.54
360
180
360
180
8
0.5
1.0
-
-
-
-
-
-
Units
V
mV
mV
mA
mA
mV/°C
µV
dB
V
A
A
Units
V
mV
mV
mA
mA
mV/°C
µV
dB
V
A
A
PL7918B
Min Typ Max
-17.28 -18 -18.72
-17.1
-
-
-
-
-
-
-
-
-
54
-
-
1.3
-18
-
-
-
-
3
-
-
-1
300
68
2
2.2
2.2
-18.9
360
180
360
180
8
0.5
1.0
-
-
-
-
-
-
PL7918E3
CYStek Product Specification
CYStech Electronics Corp.
Characteristic Curves
Average Case Power Dissipation as A Function
of Ambient Temperauture
Spec. No. : C538E3
Issued Date : 2003.04.08
Revised Date :
Page No. : 3/4
Peak Output Current as A Function of Input-
Output Differentail Voltage
2.5
100
2
Power Dissipation
Output Current
10
1.5
1
1
0.5
0.1
25
50
75
100
125
150
0
0
3
6
9
12
15
18
21
24
27
30
Ambient Temperature (ºC)
Input-Output Voltage Differential
Ripple Rejection as A Function of Frequency
100
80
80
Ripple Rejection as A Function of Output
Voltage
Ripple Rejection (dB)
60
Ripple Rejection (dB)
70
60
40
20
50
0
10
100
1000
10000
100000
40
2
4
6
8
10
12
14
16
18
20
22
Frequency
Output Voltage
Output Voltage as A Function of Junction
Temperature
6.26
6.22
Output Voltage (Volts)
6.18
6.14
6.1
6.06
-25
0
25
50
75
100
125
175
Junction Temperature (ºC)
PL7918E3
CYStek Product Specification
CYStech Electronics Corp.
TO-220AB Dimension
Marking:
A
D
B
E
C
Spec. No. : C538E3
Issued Date : 2003.04.08
Revised Date :
Page No. : 4/4
7918
H
I
G
4
P
M
3
2
1
N
K
Style: Pin 1.Gnd 2.Vin 3.Vout
4.Vin
3-Lead TO-220AB Plastic Package
CYStek Package Code: E3
O
*: Typical
DIM
A
B
C
D
E
G
H
Inches
Min.
Max.
0.2197 0.2949
0.3299 0.3504
0.1732
0.185
0.0453 0.0547
0.0138 0.0236
0.3803 0.4047
-
*
0.6398
Millimeters
Min.
Max.
5.58
7.49
8.38
8.90
4.40
4.70
1.15
1.39
0.35
0.60
9.66
10.28
-
*
16.25
DIM
I
K
M
N
O
P
Inches
Min.
Max.
-
*
0.1508
0.0295 0.0374
0.0449 0.0551
-
*
0.1000
0.5000 0.5618
0.5701 0.6248
Millimeters
Min.
Max.
-
*
3.83
0.75
0.95
1.14
1.40
-
*
2.54
12.70
14.27
14.48
15.87
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.
PL7918E3
CYStek Product Specification
嵌入式系统
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