SG1532/SG2532/SG3532
PRECISION GENERAL-PURPOSE REGULATOR
DESCRIPTION
This monolithic integrated circuit is a versatile, general-purpose voltage
regulator designed as a substantially improved replacement for the popular
SG723 device. The SG1532 series regulators retain all the versatility of the
SG723 but have the added benefits of operation with input voltages as low as
4.5 volts and as high as 50 volts; a low noise, low voltage reference;
temperature compensated, low threshold current limiting; and protective
circuits which include thermal shutdown and independent current limiting of
both the reference and output voltages. A separate remote shutdown terminal
is included . In the dual-in-line package an open collector output is available
for low input-output differential applications.
These devices are available in both hermetic 14-pin cerdip and 10-pin TO-
96 packages. In the T-package, these units are interchangeable with the LAS-
1000 and LAS-1100 regulators. The SG1532 is rated for operation over the
ambient temperature range of -55°C to 125°C while the SG2532 and SG3532
are intended for industrial applications of 0°C to 70°C.
FEATURES
•
•
•
•
•
•
Input voltage range of 4.5V to 50V
2.5V low noise reference
Independent shutdown terminal
Improved line and load regulation
80mV current limit sense voltage
Fully protected including thermal
shutdown
•
Useful output current to 150mA
HIGH RELIABILITY FEATURES
-SG1532
♦
Available to MIL-STD-883
♦
LMI level "S" processing available
BLOCK DIAGRAM
2/93 Rev 1.1 2/94
Copyright
©
1994
1
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SG1532/SG2532/SG3532
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Pulse (50 ms) Input Voltage from V
IN
to V- ....................... 50V
Continuous Input Voltage from V
IN
to V-............................ 40V
Input to Output Voltage Differential................................... 40V
Maximum Output Current ........................................... 250mA
Current from V
Z
(J, L-Package only)............................. 100mA
Note 1. Exceeding these ratings could cause damage to the device.
Current from V
REF
..........................................................
Operating Junction Temperature
Hermetic (T, J, L-Packages).......................................
Storage Temperature Range .......................... -65°C to
Lead Temperature (Soldering, 10 Seconds) .................
25mA
150°C
150°C
300°C
THERMAL DATA
J Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 30°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
.............. 80°C/W
T Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 25°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
........... 130°C/W
L Package:
Thermal Resistance-
Junction to Case
,
θ
JC
.................. 35°C/W
Thermal Resistance-
Junction to Ambient
,
θ
JA
........... 120°C/W
Note A. Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JA
).
Note B. The above numbers for
θ
JC
are maximums for the limiting
thermal resistance of the package in a standard mount-
ing configuration. The
θ
JA
numbers are meant to be
guidelines for the thermal performance of the device/pc-
board system. All of the above assume no ambient
airflow.
RECOMMENDED OPERATING CONDITIONS
(Note 2)
Input Voltage Range
SG1532/SG2532 ................................................. 5V to 45V
SG3532 .............................................................. 5V to 36V
Output Current Range ....................................... 1mA to 100mA
Note 2. Range over which the device is functional.
Reference Current ........................................................
5mA
Zener Current (J & L-Packages only) ........................... 20mA
Operating Ambient Temperature Range
SG1532 ........................................................ -55°C to 125°C
SG2532/SG3532 .............................................. 0°C to 70°C
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1532 with -55°C
≤
T
A
≤
125°C, SG2532 with
0°C
≤
T
A
≤
70°C, SG3532 with 0°C
≤
T
A
≤
70°C, V
IN
= 10V, V
OUT
= 5V, and I
OUT
= 1mA. Low duty cycle pulse testing techniques are used which maintains
junction and case temperatures equal to the ambient temperature.)
ELECTRICAL CHARACTERISTICS
Parameter
Input Voltage Range
Output Voltage Range
Max Output Current
Min (V
IN
- V
OUT
)
Reference Voltage
Temperature Stability
(Note 4)
Ref Short Circuit Current
Line Regulation
(Note 3)
Load Regulation
(Note 3)
Current Limit Sense Voltage
Shutdown Voltage Threshold
Shutdown Source Current
Zener Voltage
Standby Current
Error Amplifier Offset Voltage
Error Amplifier Input Bias
Current
T
A
= 25°C
Test Conditions
R
SC
= 0, V
OUT
= 0, T
A
= 25°C
I
OUT
= 100mA, T
A
= 25°C
T
A
= 25°C
V
REF
= 0, T
A
= 25°C
8V
≤
V
IN
≤
40V
8V
≤
V
IN
≤
20V, I
OUT
= 25mA
1mA
≤
I
OUT
≤
25mA
1mA
≤
I
OUT
≤
100mA
R
SC
= 100Ω, V
OUT
= 0V
V
OUT
= high
I
OUT
= 10mA, (J and L-Packages only)
V
IN
= 40V
SG1532/SG2532
Min. Typ. Max.
4.5
50
4.7
50
2.0
38
175 250
1.7
2.0
2.40 2.50 2.60
2.35
2.65
0.005 0.015
15
25
0.005 0.01
0.01 0.02
0.002 0.004
0.002 0.005
0.06 0.08 0.10
0.40 0.70 1.0
100 200 300
6.0
6.4
7.2
2.5
3.5
2.0
10
4.0
15
SG3532
Units
Min. Typ. Max.
4.5
40
V
4.7
40
V
2.0
38
V
175 250
mA
1.7
2.0
V
2.40 2.50 2.60
V
2.35
2.65
V
0.005 0.015 %/°C
15
25
mA
0.005 0.02
%/V
0.01 0.03
%/V
0.002 0.004 %/mA
0.002 0.005 %/mA
0.06 0.08 0.10
V
0.40 0.70 1.0
V
100 200 300
µA
6.0
6.4
7.2
V
2.5
3.5
mA
2.0
15
mV
4.0
20
µA
2/93 Rev 1.1 2/94
Copyright
©
1994
2
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SG1532/SG2532/SG3532
ELECTRICAL CHARACTERISTICS
(continued)
Parameter
Open Loop Gain
Ripple Rejection
Output Noise
(Note 4)
Long Term Stability
(Note 4)
Thermal Shutdown
(Note 4)
Test Conditions
T
A
= 25°C
f = 120Hz, T
A
= 25°C
10Hz
≤
f
≤
100KHz, T
A
= 25°C
V
IN
= 30V, T
A
= 125°C
SG3532
SG1532/SG2532
Units
Min. Typ. Max. Min. Typ. Max.
66
68
60
68
dB
66
66
dB
50
50
µV
RMS
0.3
1.0
0.3
1.0 %/Khr
°C
175
175
Note 3. Applies for constant junction temperature. Temperature drift effects must be taken into account separately when the unit is operating under
conditions of high dissipation.
Note 4. These parameters, although guaranteed, are not tested in production.
CHARACTERISTIC CURVES
FIGURE 1.
STANDBY CURRENT
FIGURE 2.
MINIMUM INPUT-OUTPUT VOLTAGE
FIGURE 3.
CURRENT LIMITING
FIGURE 4.
RIPPLE REJECTION
2/93 Rev 1.1 2/94
Copyright
©
1994
3
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SG1532/SG2532/SG3532
CHARACTERISTIC CURVES
(continued)
FIGURE 5.
FREQUENCY RESPONSE
FIGURE 6.
TRANSIENT RESPONSE
APPLICATION INFORMATION
FIGURE 7 - 90% EFFICIENT LINEAR REGULATOR
Output Voltage = 5V
Min (V
IN
-V
OUT
) at 2A = 0.4V
Load Reg 0-2A = 20mV
Max Output Current = 3A
Line Reg 6-30V = 10 mV
FIGURE 8 - HIGH CURRENT REGULATOR WITH FOLDBACK
CURRENT LIMITING AND REMOTE SHUTDOWN
Output Voltage = 5V
Max Output Current = 8A
Min V
IN
at No Load = 6.9V
Min V
IN
at 5A = 8.2V
Line Reg 10-30V = 3mV
Load Reg 0-5A = 17mV
Short Circuit Current = 1.8A
Notes:
For output voltages above 8V and load currents
which allow PNP base current to be limited to
25mA, the internal zener may be used, eliminat-
ing the need for the two external diodes and the
divider on V
REF
.
R
SC
can be eliminated if the 200mA current limit on
V
OUT
is adequate. Overall current limiting is
dependent upon PNP Beta. For greater accu-
racy, load currrent may be sensed in the ground
line.
Note:
* 100Ω surge limiting resistor should be used for
output voltages above 8V.
2/93 Rev 1.1 2/94
Copyright
©
1994
4
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
SG1532/SG2532/SG3532
APPLICATION INFORMATION
FIGURE 9 - HIGH EFFICIENCY LOW VOLTAGE REGULATOR
Output Voltage = 5V
Max Output Current = 9A
Min V
IN
at 5A = 7.0V
Line Reg 7-20V = 10mV
Load Reg 0-5A = 25mV
Constant Current Limiting
FIGURE 10 - BASIC LOW CURRENT REGULATOR
Sense Voltage
R
1
I
SC
=
1+
V
OUT
= V
REF
R
SC
R
2
R
1
R
2
C
C
= 1000 pF
R
3
= R +R
1
2
I
OUT
≤
100mA
CONNECTION DIAGRAMS & ORDERING INFORMATION
Package
14-PIN CERAMIC DIP
J - PACKAGE
(See Notes Below)
Part No.
SG1532J/883B
SG1532J/DESC
SG1532J
SG2532J
SG3532J
Ambient
Temperature Range
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
0°C to 70°C
0°C to 70°C
Connection Diagram
N.C.
CURRENT LIMIT
CURRENT SENSE
INVERTING INPUT
NON-INVERTING INPUT
V
REF
V-
1
2
3
4
5
6
7
14
13
12
11
10
9
8
N.C.
FREQ. COMPENSATION
V
IN
V
C
V
OUT
V
Z
SHUTDOWN
10-PIN METAL CAN
T - PACKAGE
SG1532T/883B
SG1532T/DESC
SG1532T
SG2532T
SG3532T
-55°C to 125°C
-55°C to 125°C
-55°C to 125°C
0°C to 70°C
0°C to 70°C
(Notes 3 & 4)
CURRENT LIMIT
10
CURRENT SENSE
INVERTING INPUT
NON-INVERTING
INPUT
V
REF
2
3
1
9
8
7
FREQ. COMPENSATION
V
IN
& V
C
SHUTDOWN
4
5
6
V
OUT
V-
20-PIN CERAMIC
LEADLESS CHIP CARRIER
L- PACKAGE
SG1532L/883B
SG1532L
-55°C to 125°C
-55°C to 125°C
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
N.C.
CURRENT LIMIT
CURRENT SENSE
N.C.
INVERTING INPUT
N.C.
N. I. INPUT
V
REF
N.C.
V-
3
4
5
6
7
8
2
1
20 19
18
17
16
15
14
9 10 11 12 13
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
N.C.
SHUTDOWN
V
Z
N.C.
V
OUT
N.C.
V
C
V
IN
N.C.
FREQ. COMP.
Note 1. Contact factory for JAN and DESC product availablity.
2. All packages are viewed from the top.
Note 3. V
Z
output is not available in T-package.
4. Pin 5 is connected to case.
2/93 Rev 1.1 2/94
Copyright
©
1994
5
11861 Western Avenue
∞
Garden Grove, CA 92841
(714) 898-8121
∞
FAX: (714) 893-2570
L
INFINITY
Microelectronics Inc.
微控制器 MCU
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