MC7908CT-E3 [VISHAY]
IC VREG 8 V FIXED NEGATIVE REGULATOR, PSFM3, TO-220, 3 PIN, Fixed Negative Single Output Standard Regulator;
| 型号： | MC7908CT-E3 |
| 厂家： | 
VISHAY |
| 描述： | IC VREG 8 V FIXED NEGATIVE REGULATOR, PSFM3, TO-220, 3 PIN, Fixed Negative Single Output Standard Regulator 局域网 输出元件 调节器 |
| 文件： | 总8页 (文件大小：70K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MC79xxCT Series
New Product
Vishay
formerly General Semiconductor
3-Terminal Fixed Negative Voltage Regulators
Pin Arrangement
Description
These voltage regulators are intended as complements
to the popular MC78xx Series devices. These negative reg-
ulators are available in the same seven-voltage options as
the MC78xx devices. In addition, one extra voltage
option commonly employed in MECL systems is also
available in the negative MC79xx Series.
TO-220
1. Ground
2. Input
3. Output
3
2
1
Available in fixed output voltage options from –5.0 to –24
volts, these regulators employ current limiting, thermal shut-
down, and safe-area compensation – making them remark-
ably rugged under most operating conditions. With adequate
heatsinking they can deliver output currents in excess of
1.5 ampere.
(heatsink connected to pin 2)
Standard Application
Features
Input
Cin
Output
• Output current in excess of 1.5 Ampere
MC79xx
• No external components required
• Internal thermal overload protection
• Internal short-circuit current limiting
• Output transistor safe-area compensation
• Output voltage offered in 2% tolerance
Co
0.1µF
0.33µF
Notes:
Mechanical Data
Case: TO-220 Package
A common ground is required between the input and the output voltages.
The input voltage must remain typically 2.0V more negative even during
the high point on the input ripple voltage.
xx = these two digits of the part number indicate output voltage.
Weight: approx. 2.24g
Cin is required if regulator is located an appreciable distance from power
supply filter.
Case outline is on the back page
Co improves stability and transient response.
Internal Block Diagram
GND
R1
R2
Reference
Voltage
Output
+
Q1
--
Q2
Short Circuit
Protection
I1
I2
RSC
Input
Document Number 74814
11-Jun-02
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1
MC79xxCT Series
Vishay
formerly General Semiconductor
Maximum Ratings Ratings at 25°C ambient temperature unless otherwise specified.
Parameter
Symbol
Value
–30
Unit
V
Input Voltage(1)
Vin
Input Voltage(2)
Vin
–40
V
Power Dissipation(3)
PD
15
W
Operating Junction Temperature Range
Storage Junction Temperature Range
TJ
–20 to +150
–65 to +150
°C
°C
Tstg
Notes: (1) MC7905 to MC7918
(2) MC7924
(3) Follow the derating curve. When TJ exceeds 150°C, the internal circuit cuts off the output
Electrical Characteristics – MC7905
V
= –10V, I = 500mA, C = 2µF, C
= 1µF;T = 0°C to 125°C, unless otherwise noted.
in
out
in
out
J
Test
Circuit
Parameter
Symbol
Conditions
Min.
–4.90
–4.85
Typ.
–5.0
—
Max.
Unit
V
TJ = 25°C
–5.10
–5.15
Output Voltage
Vo
1
1
Vin = –7 to –20V,
Io = 5mA to 1A
Vin = –7 to –25V
Vin = –8 to –12V
Io = 5mA to 1.5A
Io = 250mA to 750mA
TJ = 25°C
—
—
—
—
—
—
—
—
3
1
100
50
Line Regulation
(TJ = 25°C)
∆REGline
mV
10
3
100
50
Load Regulation
(TJ = 25°C)
∆REGload
1
2
2
mV
mA
mA
Quiescent Current
Iq
2
4
Vin = –7 to –25V
Io = 5mA to 1A
—
—
40
1.3
0.5
—
Quiescent Current Change
(TJ = 25°C)
∆Iq
Output Noise Voltage (TJ = 25°C)
Vn
1
3
f = 10Hz to 100KHz
µV
Vin = –8 to –18V
Io = 100mA, f = 120Hz
Ripple Rejection Ratio
RR
62
74
—
dB
Dropout Voltage
Vdrop
Io-peak
Io = 1.0A, TJ = 25°C
TJ = 25°C
—
—
—
1.1
2.1
—
—
—
V
A
Peak Output Current
1
1
Temp. Coefficient of Output Voltage
∆Vo/∆TA
Io=5mA, TJ = 0 to125°C
–0.4
mV/°C
Note: Where the condition TJ = 25°C is specified, pulse testing (<10ms) with low duty cycle is required to maintain junction temperature stability.
2 of 8
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Document Number 74814
11-Jun-02
MC79xxCT Series
Vishay
formerly General Semiconductor
Electrical Characteristics – MC7906
V
= –11V, I = 500mA, C = 2µF, C
= 1µF;T = 0°C to 125°C, unless otherwise noted.
in
out
in
out
J
Test
Circuit
Parameter
Symbol
Conditions
Min.
–5.88
–5.82
Typ.
–6.0
—
Max.
–6.12
–6.18
Unit
V
TJ = 25°C
Output Voltage
V
o
1
1
Vin = –8 to –21V,
Io = 5mA to 1A
Vin = –8 to –25V
Vin = –9 to –13V
Io = 5mA to 1.5A
Io = 250mA to 750mA
TJ = 25°C
—
—
—
—
—
—
—
—
4
1.5
10
3
120
60
Line Regulation
(TJ = 25°C)
REGline
mV
120
60
Load Regulation
(TJ = 25°C)
REGload
1
2
2
mV
mA
mA
Quiescent Current
Iq
2
4
Vin = –8 to –25V
Io = 5mA to 1A
—
—
44
1.3
0.5
—
Quiescent Current Change
(TJ = 25°C)
∆Iq
Output Noise Voltage (TJ = 25°C)
Vn
1
3
f = 10Hz to 100KHz
µV
Vin = –9 to –19V
Io = 100mA, f = 120Hz
Ripple Rejection Ratio
RR
60
73
—
dB
Dropout Voltage
Vdrop
Io = 1.0A, TJ = 25°C
TJ = 25°C
—
—
—
1.1
2.1
—
—
—
V
A
Peak Output Current
Io-peak
1
1
Temp. Coefficient of Output Voltage
∆V /∆TA
Io = 5mA, TJ = 0 to125°C
–0.5
mV/°C
o
Electrical Characteristics – MC7908
Vin = –14V, I = 500mA, Cin = 2µF, C
= 1µF;T = 0°C to 125°C, unless otherwise noted.
out
out
J
Test
Circuit
Parameter
Symbol
Conditions
Min.
–7.84
–7.76
Typ.
–8.0
—
Max.
–8.16
–8.24
Unit
V
TJ = 25°C
Output Voltage
V
o
1
Vin = –10.5 to –23V,
Io = 5mA to 1A
Vin = –10.5 to –25V
Vin = –11 to –15V
Io = 5mA to 1.5A
Io = 250mA to 750mA
TJ = 25°C
—
—
—
—
—
—
—
—
6
2
160
80
Line Regulation
(TJ = 25°C)
REGline
1
mV
12
4
160
80
Load Regulation
(TJ = 25°C)
REGload
1
2
2
mV
mA
mA
Quiescent Current
Iq
2.2
—
—
52
4.5
1
Vin = –10.5 to –25V
Io = 5mA to 1A
Quiescent Current Change
(TJ = 25°C)
∆Iq
0.5
—
Output Noise Voltage (TJ = 25°C)
Vn
1
3
f = 10Hz to 100KHz
µV
Vin = –11 to –21V
Io = 100mA, f = 120Hz
Ripple Rejection Ratio
RR
56
71
—
dB
Dropout Voltage
Vdrop
Io = 1.0A, TJ = 25°C
TJ = 25°C
—
—
—
1.1
2.1
—
—
—
V
A
Peak Output Current
Io-peak
1
1
Temp. Coefficient of Output Voltage
∆V /∆TA
Io=5mA, TJ = 0 to125°C
–0.6
mV/°C
o
Document Number 74814
11-Jun-02
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3
MC79xxCT Series
Vishay
formerly General Semiconductor
Electrical Characteristics – MC7909
Vin = –15V, I = 500mA, Cin = 2µF, C
= 1µF;T = 0°C to 125°C, unless otherwise noted.
out
out
J
Test
Circuit
Parameter
Symbol
Conditions
Min.
–8.82
–8.73
Typ.
–9.0
—
Max.
–9.18
–9.27
Unit
V
TJ = 25°C
Output Voltage
V
o
1
Vin = –11.5 to –24V,
Io = 5mA to 1A
Vin = –11.5 to –27V
Vin = –12 to –16V
Io = 5mA to 1.5A
Io = 250mA to 750mA
TJ = 25°C
—
—
—
—
—
—
—
—
7
2
180
90
Line Regulation
(TJ = 25°C)
REGline
1
mV
12
4
180
90
Load Regulation
(TJ = 25°C)
REGload
1
2
2
mV
mA
mA
Quiescent Current
Iq
2.2
—
—
58
4.5
1
Vin = –11.5 to –27V
Io = 5mA to 1A
Quiescent Current Change
(TJ = 25°C)
∆Iq
0.5
—
Output Noise Voltage (TJ = 25°C)
Vn
1
3
f = 10Hz to 100KHz
µV
Vin = –12 to –22V
Io = 100mA, f = 120Hz
Ripple Rejection Ratio
RR
56
71
—
dB
Dropout Voltage
Vdrop
Io = 1.0A, TJ = 25°C
TJ = 25°C
—
—
—
1.1
2.1
0.6
—
—
—
V
A
Peak Output Current
Io-peak
1
1
Temp. Coefficient of Output Voltage
∆V /∆TA
Io = 5mA, TJ = 0 to125°C
mV/°C
o
Electrical Characteristics – MC7912
Vin = –19V, I = 500mA, Cin = 2µF, C
= 1µF;T = 0°C to 125°C, unless otherwise noted.
out
out
J
Test
Circuit
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
V
TJ = 25°C
–11.76 –12.0 –12.24
Output Voltage
V
o
1
Vin = –14.5 to –27V,
Io = 5mA to 1A
–11.64
—
–12.36
Vin = –14.5 to –30V
Vin = –15 to –19V
Io = 5mA to 1.5A
Io = 250mA to 750mA
TJ = 25°C
—
—
—
—
—
—
—
—
10
3
240
120
240
120
5
Line Regulation
(TJ = 25°C)
REGline
1
mV
12
4
Load Regulation
(TJ = 25°C)
REGload
1
2
2
mV
mA
mA
Quiescent Current
Iq
2.5
—
—
75
Vin = –14.5 to –30V
Io = 5mA to 1A
1
Quiescent Current Change
(TJ = 25°C)
∆Iq
0.5
—
Output Noise Voltage (TJ = 25°C)
Vn
1
3
f = 10Hz to 100KHz
µV
Vin = –15 to –25V
Io = 100mA, f = 120Hz
Ripple Rejection Ratio
RR
55
70
—
dB
Dropout Voltage
Vdrop
Io = 1.0A, TJ = 25°C
TJ = 25°C
—
—
—
1.1
2.1
—
—
—
V
A
Peak Output Current
Io-peak
1
1
Temp. Coefficient of Output Voltage
∆V /∆TA
Io=5mA, TJ = 0 to125°C
–0.8
mV/°C
o
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Document Number 74814
11-Jun-02
MC79xxCT Series
Vishay
formerly General Semiconductor
Electrical Characteristics – MC7915
V
= –23V, I = 500mA, C = 2µF, C
= 1µF;T = 0°C to 125°C, unless otherwise noted.
in
out
in
out
J
Test
Circuit
Parameter
Symbol
Conditions
Min.
–14.7
–14.55
Typ.
–15
—
Max.
–15.3
–15.45
Unit
V
TJ = 25°C
Output Voltage
V
o
1
1
Vin = –17.5 to –30V,
Io = 5mA to 1A
Vin = –17.5 to –30V
Vin = –18 to –22V
Io = 5mA to 1.5A
Io = 250mA to 750mA
TJ = 25°C
—
—
—
—
—
—
—
—
11
3
300
150
300
150
5
Line Regulation
(TJ = 25°C)
REGline
mV
12
4
Load Regulation
(TJ = 25°C)
REGload
1
2
2
mV
mA
mA
Quiescent Current
Iq
2.5
—
—
90
Vin = –17.5 to –30V
Io = 5mA to 1A
1
Quiescent Current Change
(TJ = 25°C)
∆Iq
0.5
—
Output Noise Voltage (TJ = 25°C)
Vn
1
3
f = 10Hz to 100KHz
µV
Vin = –18 to –28V
Io = 100mA, f = 120Hz
Ripple Rejection Ratio
RR
54
69
—
dB
Dropout Voltage
Vdrop
Io = 1.0A, TJ = 25°C
TJ = 25°C
—
—
—
1.1
2.1
0.9
—
—
—
V
A
Peak Output Current
Io-peak
1
1
Temp. Coefficient of Output Voltage
∆V /∆TA
Io = 5mA, TJ = 0 to125°C
mV/°C
o
Electrical Characteristics – MC7918
V
= –27V, I = 500mA, C = 2µF, C
= 1µF;T = 0°C to 125°C, unless otherwise noted.
in
out
in
out
J
Test
Circuit
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
V
TJ = 25°C
–17.64 –18.0 –18.36
Output Voltage
V
o
1
Vin = –21 to –33V,
Io = 5mA to 1A
–17.46
—
–18.54
Vin = –21 to –33V
Vin = –22 to –26V
Io = 5mA to 1.5A
Io = 250mA to 750mA
TJ = 25°C
—
—
—
—
—
—
—
—
15
5
360
180
360
180
5
Line Regulation
(TJ = 25°C)
REGline
1
mV
12
4
Load Regulation
(TJ = 25°C)
REGload
1
2
2
mV
mA
mA
Quiescent Current
Iq
2.5
—
—
110
Vin = –21 to –33V
Io = 5mA to 1A
1
Quiescent Current Change
(TJ = 25°C)
∆Iq
0.5
—
Output Noise Voltage (TJ = 25°C)
Vn
1
3
f = 10Hz to 100KHz
µV
Vin = –21 to –31V
Io = 100mA, f = 120Hz
Ripple Rejection Ratio
RR
53
68
—
dB
Dropout Voltage
Vdrop
Io = 1.0A, TJ = 25°C
TJ = 25°C
—
—
—
1.1
2.1
–1
—
—
—
V
A
Peak Output Current
Io-peak
1
1
Temp. Coefficient of Output Voltage
∆V /∆TA
Io=5mA, TJ = 0 to125°C
mV/°C
o
Document Number 74814
11-Jun-02
www.vishay.com
5
MC79xxCT Series
Vishay
formerly General Semiconductor
Electrical Characteristics – MC7924
V
= –33V, I = 500mA, C = 2µF, C
= 1µF;T = 0°C to 125°C, unless otherwise noted.
in
out
in
out
J
Test
Circuit
Parameter
Symbol
Conditions
Min.
Typ.
–24
—
Max.
Unit
V
TJ = 25°C
–23.52
–23.28
–24.48
–24.72
Output Voltage
V
o
1
Vin = –26 to –38V,
Io = 5mA to 1A
Vin = –26 to –38V
Vin = –27 to –32V
Io = 5mA to 1.5A
Io = 250mA to 750mA
TJ = 25°C
—
—
—
—
—
—
—
—
18
6
480
240
480
240
5
Line Regulation
(TJ = 25°C)
REGline
1
mV
12
4
Load Regulation
(TJ = 25°C)
REGload
1
2
2
mV
mA
mA
Quiescent Current
Iq
3
Vin = –26 to –38V
Io = 5mA to 1A
—
—
170
1
Quiescent Current Change
(TJ = 25°C)
∆Iq
0.5
—
Output Noise Voltage (TJ = 25°C)
Vn
1
3
f = 10Hz to 100KHz
µV
Vin = –26 to –36V
Io = 100mA, f = 120Hz
Ripple Rejection Ratio
RR
50
65
—
dB
Dropout Voltage
Vdrop
Io = 1.0A, TJ = 25°C
TJ = 25°C
—
—
—
1.1
2.1
–1
—
—
—
V
A
Peak Output Current
Io-peak
1
1
Temp. Coefficient of Output Voltage
∆V /∆TA
Io = 5mA, TJ = 0 to125°C
mV/°C
o
Test Circuit 1
Test Circuit 2
1
1
3
3
MC79xx
2
MC79xx
2
A
+
1µF
1µF
+
V
+
+
2µF
2µF
I
I
o
o
Test Circuit 3
1
3
MC79xx
2
+
1µF
V
+
2µF
I
o
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6
Document Number 74814
11-Jun-02
MC79xxCT Series
Vishay
formerly General Semiconductor
Ratings and
Characteristic Curves(TA = 25°C unless otherwise noted)
Fig. 1 – Power Dissipation vs.
Ambient Temperature
Fig. 2 – Quiescent Current
20
Infinite Heatsink
V
V
= -11V
= -6.0V
= 20mA
in
O
10
θ
θ
= 5°C/W
HS
HS
2.0
I
O
= 15°C/W
No Heatsink
1.0
0.1
1.9
1.8
θ
θ
= 5°C/W
= 65°C/W
JC
JA
P
= 15W
D(max)
25
50
75
100
125
150
0
25
50
75
100
125
100K
175
TA --Ambient Temperature (°C)
TJ -- Junction Temperature (°C)
Fig. 4 –Ripple Rejection Ratio
Fig. 3 – Peak Output Current
vs. Frequency
2.5
2.0
1.5
1.0
0.5
0
100
80
60
40
20
0
Vin = --11V
Vo = --6.0V
Io = 20mA
0
6.0
12
18
24
30
10
100
1.0K
10K
Input -- Output Voltage Differential (V)
f -- Frequency (HZ)
Fig. 6 – Output Voltage
vs. Junction Temperature
Fig. 5 – Ripple Rejection
vs. Output Voltage
80
70
60
50
40
6.26
6.22
6.18
6.14
6.10
6.06
f = 120H
z
I
V
= 20mA
= 1.0V(RMS)
o
in
V
= --11V
Vo = --6.0V
Io = 20mA
in
--25
0
25
50
75
100
125 150
4.0
8.0
12
16
20
24
TJ -- Junction Temperature (°C)
Vo -- Output Voltage (V)
Document Number 74814
11-Jun-02
www.vishay.com
7
MC79xxCT Series
Vishay
formerly General Semiconductor
TO-220 Case Outline
4.85 ±
0.375
10.25 ± 0.25
3.84 ± 0.6 Dia.
1.27
± 0.12
2.69 ± 0.25
6.26 ± 0.25
14.8 ± 0.51
8.54 ± 0.26
28.7 ± 0.92
3.94 ± 0.375
13.9 ± 0.41
Dimensions in
millimeters
2.53
± 0.185
1.3 ± 0.185
0.8 ± 0.12
0.387 ± 0.09
2.55
± 0.375
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8
Document Number 74814
11-Jun-02
相关型号：
MC7909CT-E3
IC VREG 9 V FIXED NEGATIVE REGULATOR, PSFM3, TO-220, 3 PIN, Fixed Negative Single Output Standard Regulator
VISHAY
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