Microsemi Corporation SG1526J, SG1526J-883B, SG1526L, SG1526L-883B, SG2526DW Datasheet
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SG1526/SG2526/SG3526
REGULATING PULSE WIDTH MODULATOR
DESCRIPTION
The SG1526 is a high performance monolithic pulse width modulator
circuit designed for fixed-frequency switching regulators and other
power control applications. Included in an 18-pin dual-in-line package
are a temperature compensated voltage reference, sawtooth oscillator,
error amplifier, pulse width modulator, pulse metering and steering logic,
and two low impedance power drivers. Also included are protective
features such as soft-start and undervoltage lockout, digital current
limiting, double pulse inhibit, a data latch for single pulse metering,
adjustable deadtime, and provision for symmetry correction inputs. For
ease of interface, all digital control ports are TTL and B-series CMOS
compatible. Active LOW logic design allows wired-OR connections for
maximum flexibility. This versatile device can be used to implement
single-ended or push-pull switching regulators of either polarity, both
transformerless and transformer coupled. The SG1526 is characterized
for operation over the full military ambient junction temperature range of
-55°C to +150°C. The SG2526 is characterized for operation from -25°C
to +150°C, and the SG3526 is characterized for operation from 0°C to
+125°C.
BLOCK DIAGRAM
FEATURES
••
• 8 to 35 volt operation
••
••
• 5V reference trimmed to ±1%
••
••
• 1Hz to 350KHz oscillator range
••
••
• Dual 100mA source/sink outputs
••
••
• Digital current limiting
••
••
• Double pulse suppression
••
••
• Programmable deadtime
••
••
• Undervoltage lockout
••
••
• Single pulse metering
••
••
• Programmable soft-start
••
••
• Wide current limit common mode range
••
••
• TTL/CMOS compatible logic ports
••
••
• Symmetry correction capability
••
••
• Guaranteed 6 unit synchronization
••
HIGH RELIABILITY FEATURES - SG1526
♦♦
♦ Available to MIL-STD-883B and DESC SMD
♦♦
♦♦
♦ Radiation data available
♦♦
♦♦
♦ LMI level "S"processing available
♦♦
+V
GROUND
RESET
C
SOFTSTART
COMPENSATION
+ ERROR
— ERROR
+ C.S.
— C.S.
V
REF
+V
IN
R
D
R
T
C
T
Reference
Regulator
Oscillator
Soft
Start
+V
IN
Amp
To Internal
Circuitry
Undervoltage
Lockout
SYNC
SHUTDOWN
S
Q
D
Q
METERING
F/F
S
R
Q
MEMORY
F/F
T
TOGGLE
F/F
Q
Q
C
OUTPUT A
OUTPUT B
4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc.
Copyright 1994 11861 Western Avenue
1 (714) 898-8121
∞ ∞
∞ Garden Grove, CA 92841
∞ ∞
∞∞
∞ FAX: (714) 893-2570
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ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Voltage (V
Collector Supply Voltage (V
Logic Inputs .........................................................
) ...............................................................
IN
) .............................................
C
-0.3V to 5.5V
Analog Inputs ..........................................................
Source/Sink Load Current (each output) .......................
Reference Load Current ..................................................
Note 1. Exceeding these ratings could cause damage to the device.
40V
40V
-0.3V to V
200mA
50mA
THERMAL DATA
J Package:
Thermal ResistanceThermal Resistance-
N Package:
Thermal ResistanceThermal Resistance-
DW Package:
Thermal ResistanceThermal Resistance-
L Package:
Thermal ResistanceThermal Resistance-
Junction to Case, θ
Junction to Ambient, θ
Junction to Case, θ
Junction to Ambient, θ
Junction to Case, θ
Junction to Ambient, θ
Junction to Case, θ
Junction to Ambient, θ
JC
JC
JC
JC
.................. 25°C/W
.............. 70°C/W
JA
.................. 30°C/W
............. 60°C/W
JA
.................. 35°C/W
............. 90°C/W
JA
................... 35°C/W
........... 120°C/W
JA
SG1526/SG2526/SG3526
Logic Sink Current ............................................................
Operating Junction Temperature
Hermetic (J, L Packages) ............................................
IN
Plastic (N, DW Packages) ...........................................
Storage Temperature Range ............................
Lead Temperature (Soldering, 10 Seconds) ...................
Note A. Junction Temperature Calculation: TJ = TA + (PD x θJA).
Note B. The above numbers for θ
thermal resistance of the package in a standard mounting configuration. The θ
guidelines for the thermal performance of the device/pc-
are maximums for the limiting
JC
numbers are meant to be
JA
board system. All of the above assume no ambient
airflow.
15mA
150°C
150°C
-65°C to 150°C
300°C
RECOMMENDED OPERATING CONDITIONS (Note 2)
Input Voltage .............................................................
Collector Supply Voltage ........................................
Sink/Source Load Current (each output) ................
Reference Load Current ...........................................
Oscillator Frequency Range ..............................
Oscillator Timing Resistor ..................................
Note 2. Range over which the device is functional.
8V to 35V
4.5V to 35V
0 to 100mA
0 to 20mA
1Hz to 350KHz
2KΩ to 150KΩ
Oscillator Timing Capacitor ....................................
Available Deadtime Range at 40KHz ......................
Operating Ambient Temperature Range:
SG1526 .........................................................
SG2526 ...........................................................
-55°C to 125°C
-25°C to 85°C
SG3526 ...............................................................
1nF to 20µF
3% to 50%
0°C to 70°C
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1526 with -55°C ≤ TA ≤ 125°C, SG2526 with
-25°C ≤ T
temperatures equal to the ambient temperature.)
Reference Section (Note 3)
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Output Voltage Range (Note 9)
Short Circuit Current
Undervoltage Lockout Section
RESET Output Voltage
RESET Output Voltage
≤ 85° C, SG3526 with 0°C ≤ TA ≤ 70° C, and VIN = 15V. Low duty cycle pulse testing techniques are used which maintains junction and case
A
Parameter Test Conditions
TJ = 25°C
V
= 8 to 35V
IN
= 0 to 20mA
I
L
(Note 9)
Over Operating T
J
Over Recommended Operating Conditions
= 0V
V
REF
V
= 3.8V
REF
= 4.8V
V
REF
SG1526/2526
Min. Typ. Max.
4.95
5.00
5.05
10
30
30
10
15
50
4.90
5.00
5.10
50
125
0.2
0.4
2.4
4.8
SG3526
Min. Typ. Max.
4.90
5.00
5.10
10
30
10
50
15
50
4.85
5.00
5.15
50
125
0.40.2
4.82.4
Units
V
mV
mV
mV
V
mA
V
V
4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc.
Copyright 1994 11861 Western Avenue
2 (714) 898-8121
∞ ∞
∞ Garden Grove, CA 92841
∞ ∞
∞∞
∞ FAX: (714) 893-2570
∞∞
ELECTRICAL CHARACTERISTICS (continued)
SG1526/SG2526/SG3526
Test ConditionsParameter Units
Oscillator Section (Note 4)
Initial Accuracy
Voltage Stability
Temperature Stability
(Note 9)
Minimum Frequency (Note 9)
Maximum Frequency
Sawtooth Peak Voltage
Sawtooth Valley Voltage
TJ = 25°C
V
= 8 to 35V
IN
Over Operating T
J
RT = 150KΩ, CT = 20µF
= 2KΩ, CT = 1.0nF
R
T
V
= 35V
IN
V
= 8V
IN
Error Amplifier Section (Note 5)
Input Offset Voltage
RS ≤ 2KΩ
Input Bias Current
Input Offset Current
DC Open Loop Gain
High Output Voltage
Low Output Voltage
Common Mode Rejection
Supply Voltage Rejection
PWM Comparator Section
Minimum Duty Cycle
Maximum Duty Cycle
(Note 4)
R
≥ 10MΩ, TJ = 25°C
L
V
- V
- V
≥ 150mV, I
PIN2
≥ 150mV, I
PIN1
= 0.4V
= 3.6V 45 49
PIN1
V
PIN2
R
≤ 2KΩ
S
V
= 8V to 35V
IN
V
COMPENSATION
V
COMPENSATION
SOURCE
= 100µA
SINK
= 100µA
Digital Ports (SYNC, SHUTDOWN, and RESET)
I
HIGH Output Voltage
LOW Output Voltage
HIGH Input Current
LOW Input Current
SOURCE
I
SINK
= 2.4V
V
IH
V
= 0.4V
IL
= 40µA
= 3.6mA
Current Limit Comparator Section (Note 6)
Sense Voltage
RS ≤ 50Ω, TJ = 25°CmV
Input Bias Current
Soft-Start Section
Error Clamp Voltage
C
Charging Current 50
S
Output Drivers (each output)
HIGH Output Voltage
LOW Output Voltage
Collector Leakage
Rise Time
Fall Time
Power Consumption Section
RESET = 0.4V
RESET = 2.4V
(Note 7)
I
SOURCE
I
SOURCE
I
SINK
I
SINK
V
C
C
(Note 8)
= 20mA
= 100mA
= 20mA
= 100mA
= 40V
C
= 1000pF
L
= 1000pF
L
SHUTDOWN = 0.4VStandby Current 18 30 18 30 mA
Note 3. IL = 0mA
Note 4. F
Note 5. VCM = 0 to 5.2V
Note 6. V
= 40KHz (RT = 4.12KΩ ±1%, CT = .01µF ±1%, RD = 0Ω)
OSC
= 0 to 12V
CM
Note 7. VC = 15V
Note 8. V
Note 9. These parameters, although guaranteed over the recom-
= 35V
IN
mended operating conditions, are not tested in production.
SG1526/2526
SG3526
Min. Typ. Max. Min. Typ. Max.
350
0.5
64
3.6
70
66
±3
0.5
7
3.0
1.0
2
-350
35
72
4.2
0.2
94
80
±8
1.0
10
1.0
3.5
5
-1000
100
0.4
0
350
0.5
60
3.6
70
66
±3
0.5
5
3.0
1.0
2
-350
35
72
4.2
0.2
94
80
±8
1.0
10
1.0
3.5
10
-2000
200
0.4
0%
45 49
2.4 4
0.2
-125
-225
90 100-3110
0.1
100
12.51213.5
13
0.2
1.2
50
0.3
0.1
0.4
-300
-500
-10
0.4
200 50
12.51213.5
0.3
2
150
0.6
0.2
2.4 4
0.2
0.4
-125
-300
-225
-500
80 100-3120
-10
0.1
0.4
100
200VµA
13
0.2
0.3
1.2
50
150
0.3
0.6
0.1
0.2
2
%
%
%
Hz
KHz
V
V
mV
nA
nA
dB
V
V
dB
dB
%
V
V
µA
µA
µA
V
V
V
V
µA
µs
µs
4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc.
Copyright 1994 11861 Western Avenue
3 (714) 898-8121
∞ ∞
∞ Garden Grove, CA 92841
∞ ∞
∞∞
∞ FAX: (714) 893-2570
∞∞
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