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OM7611ST
ISOLATED HERMETIC TO-257AA ADJUSTABLE VOLTAGE REGULATORS
Three Terminal, Adjustable Voltage, 3.0 Amp Precision Negative Regulators In Hermetic JEDEC TO-257AA Package
FEATURES
* * * * * * Isolated Hermetic Package, JEDEC TO-257AA Outline Reference Voltage Set Internally to 2% Built-In Thermal Overload Protection Short Circuit Current Limiting Pin Out Identical To Plastic TO-220 Product Is Available Screened To MIL-STD-883
DESCRIPTION
These three terminal negative regulators are supplied in a hermetically sealed metal package whose outline is similar to the industry standard TO-220 plastic package. All protective features are designed into the circuit, including thermal shutdown, current limiting and safe-area control. With heat sinking, they can deliver over 3.0 amps of output current. These units feature 2% initial voltage tolerance, with 1.0% load regulation and .015% line regulation.
ABSOLUTE MAXIMUM RATINGS @ 25C
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -35V Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55C to +150C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Typical Power/Thermal Characteristics: Rated Power @ 25C TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28W TA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W Thermal Resistance qJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2C/W qJA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42C/W
3.3
4 11 R3 Supersedes 1 07 R2
3.3 - 153
OM7611ST
ELECTRICAL CHARACTERISTICS
Parameter Reference Voltage Symbol VREF
-55C TA +125C (unless otherwise specified)
Min. -1.238 Max. -1.262 V -1.215 -1.285 0.015 %/V 0.04 50 mV 75 1.0 % 1.5 0.02 56 %/W dB 53 70 dB 60 100 2.0 A 5.0 5.0 mA 3.0 3.0 6.0 A 3.0 0.5 2.5 A 0.5 1.5 % A Unit
Test Conditions VIN - VOUT OE= 5 V, IOUT = 5 mA, TA = 25 C 3V VIN - VOUT OE 35 V VIN - VOUT OE 35 V
* * * *
Line Regulation (Note 1) Load Regulation (Note 1)
VOUT VIN VOUT IOUT
3V
VOUT OE 5 V, TA = 25 C 10 mA IOUT IMAX. VOUT OE 5.0 V 10 mA IOUT IMAX.
Thermal Regulation Ripple Rejection (Note 2)
VIN VREF
30 ms pulse, TA = 25 C VOUT OE -10 V, f = 120 Hz, CAdj = 0 =
* * * * * * * * * *
= VOUT OE -10 V, f = 120 Hz, CAdj = 10 F Adjust Pin Current Adjust Pin Current Change IAdj IAdj VDIFF = 35 V, IL = 10 mA 10 mA IOUT 3V Minimum Load Current IMin IMAX.
VIN - VOUT OE 35 V VIN - VOUT OE 35 V VIN - VOUT OE 10 V
Current Limit
ILim
VIN - VOUT OE 10 V
VIN - VOUT OE= 35 V Temperature Stability (Note 2) Long Term Stability (Note 2) VOUT T VOUT T
-55 C TJ +125 C
TA = +125 C, t = 1000 hrs
1.0
%
Notes: 1. Line and Load Regulation are measured at a constant junction temperature using a low duty cycle pulse technique. Although power dissipation is internally limited, regulation is guaranteed up to the maximum power dissipation of 30 W. Power dissipation is determined by the input/output differential voltage and the output current. Guaranteed maximum power dissipation will not be available over the full input/output voltage range. 2. Guaranteed by design, characterization or correlation to other tested parameters.
3.3
3. The * denotes the specifications which apply over the full operating temperature range.
3.3 - 154
OM7611ST
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage Input-Output Differential (V) Reference Voltage (V) 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2
TJ = -150C
Temperature Stability 1.270 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0
Minimum Load Current
TJ = -55C TJ = -25C
1.250 1.240 1.230 -75 -50 -25 0 25 50 75 100125150 Temperature (C)
Current (mA)
1.260
TJ = -55C
TJ = 150C
TJ = 25C
0.5 1.0 1.5 2.0 2.5 3.0 Output Current (A)
0 10 20 30 40 Input-Output Differential (V)
Ripple Rejection 100 Ripple Rejection (dB) 80 60 40
VIN - VOUT = 5 V CADJ = 0
Ripple Rejection 100 Ripple Rejection (dB) Ripple Rejection (dB) 80
CADJ = 10F
Ripple Rejection 100
CADJ = 10F
CADJ = 10F
80 60
CADJ = 0
60 40 20 0 10
CADJ = 0 VIN = -15 V VOUT = -10 V IL = 500mA, TJ = 25C
40
VIN = -15 V
20 0 0
IL = 500 mA f = 120Hz, TJ = 25C
20
VOUT = -10 V f = 120Hz, TJ = 25C
-10 -20 -30 Output Voltage (V) Output Impedance
-40
100 1k 10k 100k 1M Frequency (Hz)
0 0.01
0.1 1 Output Current (A)
10
Line Transient Response 0.8 0.6 0.4 0.2 0 -0.2 -0.4 0 -0.5 -1.0
CADJ = 0
Load Transient Response 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 0 -0.5 -1.0 -1.5 Output Voltage Deviation (V)
CADJ = 0
Output Impedance ()
VIN = -15V VOUT = -10V IL = 500mA TJ = 25C CL = 1F
CADJ = 0
100 10-1 10-2
Input Voltage Output Voltage Change(V) Deviation (V)
101
CADJ = 10F VIN = -15V VOUT = -10V IL = 50mA TJ = 25C CL = 1F
CADJ = 10F
10-3 10 100 1k 10k 100k 1M Frequency (Hz)
Load Current (A)
VOUT = -10V IL = 50mA TJ = 25C CL = 1F
CADJ = 10F
0
10 20 30 Time (S)
40
0
10 20 30 Time (S)
40
3.3
Load Regulation* 0.8 0.4 0 -0.4 -0.8 0 0.8 1.6 2.4 3.2 Output Current (A) 4.0 Output Current (A)
Guaranteed Minimum Output Current 5 Adjustment Current (A) 4 3 2 1 0 0 5 10 15 20 25 30 35 Input-Output Differential (V)
Adjustment Current 80 75 70 65 60 55 50 -75 -50 -25 0 25 50 75 100 125 150 Temperature (C)
Output Voltage Deviation (%)
3.3 - 155
OM7611ST
TYPICAL APPLICATIONS
Multiple Tracking Regulators
C1 + 10F + C2 5F Adj VIN VOUT OM7611 R2 IADJ VREF
+ + C3 10F 2F Adj - VIN VIN
R1
R2 + C1 2F Solid Tantalum -VOUT1
+ R1
C3 2F
VOUT
IN4002
-VIN
-VOUT
+ 2F
OM7611
VOUT = VREF
(
1+ R2 R1
)
+IADJ (R2)
VIN
Adj
R2
VOUT
IN4002
OM7611
+ 2F Solid Tantalum -VOUT2
High Stability Regulator
+
7V LM329B + 5F R3 1.5k 1%
2F Adj VIN
R#N
R2* + R1 1k 1% 2F Solid Tantalum -VOUT
VOUT
OM7611
+ 2F Solid Tantalum -VOUT3
-VIN
Adj VIN VOUT OM7611 *R2 =
VOUT 9.08 X 10-3
MECHANICAL OUTLINE
.420 .410 .200 .190 .045 .035 .665 .645 .537 .527 .430 .410 .038 MAX.
PIN CONNECTION
Tab
.150 .140
3.3
.750 .500
.005
.035 .025
.100 TYP.
.120 TYP.
123 Front View Pin 1: Adjust Pin 2: VIN Pin 3: VOUT Tab: Isolated
NOTES
* Case is metal/hermetically sealed * Isolated Tab
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246

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