SG137T/883B [MICROSEMI]
1.5 AMP NEGATIVE ADJUSTABLE REGULATOR; 1.5 AMP负可调稳压器型号: | SG137T/883B |
厂家: | Microsemi |
描述: | 1.5 AMP NEGATIVE ADJUSTABLE REGULATOR |
文件: | 总6页 (文件大小:318K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SG137A/SG237A/SG337A
SG137/SG237/SG337
1.5 AMP NEGATIVE
ADJUSTABLE REGULATOR
DESCRIPTION
FEATURES
The SG137A family of negative adjustable regulators will deliver up to 1.5A
output current over an output voltage range of -1.2V to -37V. Silicon General
has made significant improvements in these regulators compared to previous
devices, such as better line and load regulation, and a maximum output voltage
error of 1%. The SG137 family uses the same chip design and guarantees
maximum output voltage error of ±2%.
• 1 % output voltage tolerance
• 0.01%/V line regulation
• 0.5% load regulation
• 0.02%/W thermal regulation
• Available in hermetic TO-220
HIGH RELIABILITY FEATURES
-SG137A/SG137
Every effort has been made to make these devices easy to use and difficult to
damage. Internal current and power limiting coupled with true thermal limiting
prevents device damage due to overloads or shorts even if the regulator is not
fastened to a heat sink.
♦ Available to MIL-STD-883 and DESC SMD
♦ Scheduled for MIL-M38510 QPL listing
♦ MIL-M38510/11804BYA - JAN137K
♦ LMI level "S" processing available
The SG137A/137 family of products are ideal complements to the SG117A/
117 adjustable positive regulators.
BLOCK DIAGRAM
2/92 Rev 1.1 2/94
L
Copyright 1994
1
SG137A/SG137 SERIES
ABSOLUTE MAXIMUM RATINGS (Note 1)
Power Dissipation ..........................................
Operating Junction Temperature
Hermetic (K, R, T, L, IG-Packages) ...........................
Lead Temperature (Soldering, 10 Seconds) .............
Internally Limited
Input to Output Voltage Differential ....................................
40V
-65°C to 150°C
150°C
300°C
Storage Temperature Range ............................
Note 1. Exceeding these ratings could cause damage to the device.
THERMAL DATA
K Package:
Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).
Thermal Resistance-Junction to Leads, θJC ................ 3.0°C/W
Thermal Resistance-Junction to Ambient, θJA ............... 35°C/W
R Package:
Thermal Resistance-Junction to Leads, θJC ................ 5.0°C/W
Thermal Resistance-Junction to Ambient, θJA .............. 40°C/W
T Package:
Thermal Resistance-Junction to Leads, θJC ................. 15°C/W
Thermal Resistance-Junction to Ambient, θJA ............ 120°C/W
IG Package:
Note B. The above numbers for θJC are maximums for the limiting
thermal resistance of the package in a standard mount-
ing configuration. The θJA numbers are meant to be
guidelines for the thermal performance of the device/pc-
board system. All of the above assume no ambient
airflow.
Thermal Resistance-Junction to Leads, θJC ................ 3.5°C/W
Thermal Resistance-Junction to Ambient, θJA .............. 42°C/W
L Package:
Thermal Resistance-Junction to Leads, θJC ................. 35°C/W
Thermal Resistance-Junction to Ambient, θJA ............ 120°C/W
RECOMMENDED OPERATING CONDITIONS (Note 2 & 3)
Input Voltage Range ..............................-(VOUT + 3.5V) to -36V
Operating Junction Temperature Range
SG137A/SG137 ...........................................-.55°C to 150°C
SG237A/SG237 ...........................................-.25°C to 150°C
SG337A/SG337 ............................................. 0°C to 125°C
Note 2. Range over which the device is functional.
Note 3. These ratings are applicable for junction temperatures of less than 135°C.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG137A/SG137 with -55°C≤ T ≤150°C, SG237A/
SG237 with -25°C≤ TA ≤ 150°C, SG337A/SG337 with 0°C≤ TA ≤125°C, |VIN - VOUT| = 5.0V, and for IOUT = 500mA (K, R, and IG powerApackages) and IOUT
=100mA(TandLpackages). Althoughpowerdissipationisinternallylimited,thesespecificationsareapplicableforpowerdissipationsof2ΩfortheTand
L packages, and 20Ω for the K, R, and IG packages. IMAX is 1.5A for the K, R, and IG packages and 0.5A for the T and L packages. Low duty cycle pulse
testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
SG137A/SG237A
Min. Typ. Max.
-1.238-1.250-1.262-1.225-1.250-1.275
-1.220-1.250-1.280-1.200-1.250-1.300
SG137/SG237
Min. Typ. Max.
Parameter
Test Conditions
IOUT = 10mA, TA = 25°C
Units
Reference Voltage (Note 6)
V
V
3V ≤ |V - VOUT| ≤ 40V, 10mA ≤ IOUT ≤ IMAX
IN
Line Regulation (Note 4, 6)
Load Regulation (Note 4)
3V ≤ |V - VOUT| ≤ 40V, IOUT ≤ IMAX
TA = 25°C
10mA ≤ IOUT ≤ IMAX
|VOUT| ≤ 5V, TA = 25°C
|VOUT|≥ 5V, TA = 25°C
|VOUT| ≤ 5V
IN
0.005 0.01
0.01 0.02
%/V
5
0.1
10
25
0.5
50
15
0.3
20
25
0.5
50
mV
%
mV
%
0.2
1.0
0.3
1.0
|VOUT|≥ 5V
Thermal Regulation (Note 5)
Ripple Rejection
TA = 25°C, 10ms pulse
VOUT = -10V, f =120Hz
0.002 0.02
0.002 0.02 %/W
60
70
66
80
65
1.0
0.2
60
77
65
2
dB
dB
µA
µA
µA
C
ADJ = 0, TA = 25°C
CADJ = 10µF
TA = 25°C
3V ≤ |VIN - VOUT| ≤ 40V
10mA ≤ IOUT ≤ IMAX
66
Adjust Pin Current
Adjust Pin Current Change
(Note 6)
100
5
2
100
5
5
0.5
2/92 Rev 1.1 2/94
Copyright 1994
2
SG137A/SG137 SERIES
ELECTRICAL CHARACTERISTICS (continued)
SG137A/SG237A
Min. Typ. Max. Min. Typ. Max.
SG137/SG237
Parameter
Test Conditions
Units
Minimum Load Current
|VIN - VOUT| ≤ 40V
|VIN - VOUT| ≤ 10V
2.5
1.2
5.0
3
2.5
1.2
5.0
3.0
mA
mA
Current Limit
|VIN - VOUT| ≤ 15V
K, P, R, IG Packages
T, L, Packages
1.5
0.5
2.2
0.8
3.2
1.5
1.5
0.5
2.2
0.8
A
A
|VIN - VOUT| ≤ 40V, TJ = 25°C
K, P, R, IG Packages
T, L, Packages
0.24 0.4
0.15 0.25 0.5 0.15 0.25
1.0 0.24 0.4
A
A
Temperature Stability (Note 5)
Long Term Stability (Note 5)
RMS Output Noise (% of VOUT
0.6
0.3
0.003
1.5
1.0
0.6
0.3
0.003
%
%
%
TA = 125°C, 1000 Hours
TA = 25°C, 10Hz ≤ f ≤ 10 KHz (Note 5)
1.0
)
SG337A
SG337
Parameter
Test Conditions
Units
Min. Typ. Max.
Min. Typ. Max.
-1.238-1.250-1.262-1.213-1.250
Reference Voltage (Note 6)
I
OUT = 10mA, TA = 25°C
3V ≤ |V - VOUT| ≤ 40V, 10mA ≤ IOUT ≤ IMAX
V
V
-1.287
-1.220-1.250-1.280-1.200-1.250-1.300
IN
Line Regulation (Note 4, 6)
Load Regulation (Note 4)
3V ≤ |V - VOUT| ≤ 40V, IOUT ≤ IMAX
TA = 25°C
10mA ≤ IOUT ≤ IMAX
|VOUT| ≤ 5V, TA = 25°C
|VOUT|≥ 5V, TA = 25°C
|VOUT| ≤ 5V
IN
0.005 0.01
0.01 0.04
%/V
5
0.1
10
25
0.5
50
15
0.3
20
mV
%
mV
%
50
1.0
70
|VOUT|≥ 5V
0.2
1.0
0.3
1.5
Thermal Regulation (Note 5)
Ripple Rejection
TA = 25°C, 10ms pulse
VOUT = -10V, f =120Hz
0.002 0.02
0.003 0.04 %/W
C
ADJ = 0, TA = 25°C
60
70
66
80
65
1.0
0.2
2.5
1.2
60
77
65
2
0.5
2.5
1
dB
dB
µA
µA
µA
mA
mA
CADJ = 10µF
TA = 25°C
66
Adjust Pin Current
Adjust Pin Current Change
(Note 6)
100
5
2
5
3
100
5
5
10
6
3V ≤ |VIN - VOUT| ≤ 40V
10mA ≤ IOUT ≤ IMAX
|VIN - VOUT| ≤ 40V
|VIN - VOUT| ≤ 10V
|VIN - VOUT| ≤ 15V
K, P, R, IG-Packages
T, L-Packages
Minimum Load Current
Current Limit
1.5
0.5
2.2
0.8
3.5
1.5
1.5
0.5
2.2
0.8
A
A
|VIN - VOUT| ≤ 40V, TJ = 25°C
K, P, R, IG- Packages
T, L-Packages
0.24 0.5
0.15 0.25 0.5 0.10 0.17
1.0 0.15 0.4
A
A
Temperature Stability (Note 5)
Long Term Stability (Note 5)
RMS Output Noise (% of VOUT
0.6
0.3
0.003
1.5
1.0
0.6
0.3
0.003
%
%
%
TA = 125°C, 1000hr
TA = 25°C, 10Hz ≤ f ≤ 10KHz (Note 5)
1.0
)
Note 4. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating
effects are covered under the specification for thermal regulation.
Note 5. These parameters, although guaranteed, are not tested in production.
Note 6. IMAX for K, R, and IG packages is VIN - VOUT = 3V / 1.5A and VIN - VOUT = 40V / 240mA. For T and L packages IMAX is VIN - VOUT = 3V / 500mA
and VIN - VOUT = 40V / 150mA.
2/92 Rev 1.1 2/94
L
Copyright 1994
3
SG137A/SG137 SERIES
CHARACTERISTIC CURVES
FIGURE 2.
FIGURE 1.
FIGURE 3.
INPUT/OUTPUT DIFFERENTIAL
REFERENCE VOLTAGE VS. TEMPERATURE
CURRENT VS. INPUT/OUTPUT DIFFERENTIAL
VS. OUTPUT CURRENT
FIGURE 4. *
FIGURE 5.
FIGURE 6.
OUTPUT VOLTAGE DEVIATION
VS. OUTPUT CURRENT
INPUT/OUTPUT DIFFERENTIAL
VS. OUTPUT CURRENT
ADJUSTMENT CURRENT VS. TEMPERATURE
*
The SG137A has load regulation compensation which
makes the typical unit read close to zero. This band
represents the typical production spread.
APPLICATION INFORMATION
OUTPUT VOLTAGE
The output voltage is determined by two external resistors, R1 &
R2(see Figure 7).
Where: VREF =Reference Voltage, IADJ = Adjustment Pin Current.
In most applications, the second term is small enough to be
ignored, typically about 0.5% of VOUT. In more critical applica-
tions, the exact formula should be used, with IADJ equal to 65µA.
Solving for R2 yields:
VOUT - VREF
R2 =
VREF
+ IADJ
R1
Smaller values of R1 and R2 will reduce the influence of IADJ on the
output voltage, but the no-load current drain on the regulator will
be increased. Typical values for R1 are between 100Ω and 300Ω,
giving 12.5 mA and 4.2mA no-load current respectively. There
is an additional consideration in selecting R1 the minimum load
current specification of the regulator. The operating current of
FIGURE 6
The exact formula for the output voltage is:
R2 + R1
VOUT = VREF
+ IADJ (R2)
(
)
R1
2/92 Rev 1.1 2/94
Copyright 1994
4
SG137A/SG137 SERIES
APPLICATION INFORMATION (continued)
EXAMPLES:
the SG137A flows from input to output. If this current is not
absorbed by the load, the output of the regulator will rise above
the regulated value. The current drawn by R1 and R2 is normally
high enough to absorb the current, but care must be taken in no–
load situations where R1 and R2 have high values. The maximum
value for the operating current, which must be absorbed, is 5mA
for the SG137A, If input-output voltage differential is less than
10V, the operating current that must be absorbed drops to 3mA.
The output stability, load regulation, line regulation, thermal
1. A precision 10V regulator to supply up to 1Amp load current.
a. Select R1 = 100Ω to minimize effect of IADJ
VOUT - VREF
10V - 1.25V
(1.25V/100W)+65mA
b. Calculate R2 =
=
= 704W
(VREF/R1) + IADJ
2. A 15V regulator to run off batteries and supply 50mA.
VIN MAX = 25V
a. To minimize battery drain, select R1 as high as possible
1.25V
R1 =
= 417Ω, use 404Ω, 1%
3mA
TYPICAL APPLICATIONS
regulation, temperature drift, long term drift, and noise, can be
improved by a factor of 6.6 over the standard regulator configu-
ration. This assumes a zener whose drift and noise is considera-
bly better than the regulator itself. The LM329B has 20PPM/°C
maximum drift and about 10 times lower noise than the regulator.
In the application shown Figure 8, regulators #2 to #N will track
regulator #1 to within ±24mV initially, and to ±60mV over all load,
line, and temperature conditions. If any regulator output is
shorted to ground, all other outputs will drop to -2V. Load
regulation of regulators #2 to #N will be improved by VOUT/1.25V
compared to a standard regulator, so regulator #1 should be the
one which has the lowest load current.
FIGURE 8 - MULTIPLE TRACKING REGULATORS
FIGURE 9 - HIGH STABILITY REGULATOR
FIGURE 10 - CURRENT REGULATOR
FIGURE 11 - DUAL TRACKING SUPPLY ±1.25V to ±20V
2/92 Rev 1.1 2/94
L
Copyright 1994
5
SG137A/SG137 SERIES
CONNECTION DIAGRAMS & ORDERING INFORMATION (See Notes Below)
Ambient
Temperature Range
Package
Part No.
Connection Diagram
3-TERMINALTO-3
METAL CAN
K-PACKAGE
SG137AK/883B
SG137AK/DESC -55°C to 125°C
-55°C to 125°C
ADJUSTMENT
SG137AK
SG237AK
SG337AK
SG137K/883B
JAN137K
SG137K/DESC
SG137K
SG237K
-55°C to 125°C
-25°C to 85°C
0°C to 70C
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-25°C to 85°C
0°C to 70°C
1
2
CASE IS VIN
VOUT
SG337K
3-TERMINALTO-66
METAL CAN
R-PACKAGE
SG137AR/883B
SG137AR/DESC -55°C to 125°C
-55°C to 125°C
ADJUSTMENT
SG137AR
SG237AR
SG337AR
SG137R/883B
SG137R/DESC
SG137R
-55°C to 125°C
-25°C to 85°C
0°C to 70°C
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-25°C to 85°C
0°C to 70°C
1
2
CASE IS VIN
VOUT
SG237R
SG337R
3-PIN TO-39 METAL CAN
T-PACKAGE
SG137AT/883B
SG137AT/DESC -55°C to 125°C
-55°C to 125°C
SG137AT
SG237AT
SG337AT
SG137T/883B
SG137T/DESC
SG137T
-55°C to 125°C
-25°C to 85°C
0°C to 70°C
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-25°C to 85°C
0°C to 70°C
ADJUSTMENT
VOUT
1
2
VIN
3
SG237T
SG337T
3-PIN HERMETIC TO-257
IG-PACKAGE(Isolated)
SG137AIG/883B -55°C to 125°C
SG137AIG/DESC -55°C to 125°C
VOUT
VIN
SG137AIG
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
SG137IG/883B
SG137IGDESC
SG137IG
ADJUST
(Note 4)
20-PIN CERAMIC (LCC)
LEADLESS CHIP CARRIER
L- PACKAGE
SG137AL/883B
SG137AL/DESC
SG137AL
SG137L/883B
SG137L/DESC
SG137L
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
3
2
1
20 19
1. VOUT
2. VOUT
3. N.C.
4. N.C.
5. N.C.
6. N.C.
7. N.C.
8. N.C.
9. N.C.
10. N.C.
11. VIN
12. N.C.
13. N.C.
14. N.C.
15. N.C.
16. ADJUST
17. N.C.
18. N.C.
19. N.C.
20. N.C.
4
5
6
18
17
16
7
8
15
14
9
10 11 12 13
Note 1. Contact factory for JAN and DESC product availability.
2. All parts are viewed from the top.
3. Product is also available in flatpack. Consult factory for price and delivery.
4. Both outputs must be externally connected together at the device terminals.
2/92 Rev 1.1 2/94
Copyright 1994
6
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