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OM7602ST
ISOLATED HERMETIC TO-257AA ADJUSTABLE VOLTAGE REGULATOR
Three Terminal, Adjustable Voltage, 1.5 Amp Precision Positive Regulator In Hermetic JEDEC TO-257AA Package
FEATURES
* * * * * * * Isolated Hermetic Package, JEDEC TO-257AA Outline Adjustable Output Voltage Eliminates Stocking Fixed Voltages Built-In Thermal Overload Protection Short Circuit Current Limiting Product Is Available Screened To OM803 Similar To Industry Standard P/N LM117
DESCRIPTION
This three terminal positive regulator is 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 1.0 amp of output current. This unit features output voltages that can be trimmed using external resistors, from 1.2 volts to 37 volts.
ABSOLUTE MAXIMUM RATINGS @ 25C
Input-Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -55C to +150C Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Typical Power/Thermal Characteristics: Rated Power @ 25C TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.5W TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W Thermal Resistance qJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5C/W qJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42C/W
3.3
Note: This device is also available in a non-isolated JEDEC TO-257AA package. Use part number OM7602NT for non-isolated unit.
4 11 R4 Supersedes 1 07 R3
3.3 - 131
OM7602ST
ELECTRICAL CHARACTERISTICS
Parameter Reference Voltage Symbol VREF
-55C TA 125C, IL = 8mA (unless otherwise specified)
Min. 1.238 Max. 1.262 1.270 1.270 4.5 9 15 15 15 15 5 mV mV mV V Unit
Test Conditions VDIFF = 3.0V, TA = 25C VDIFF = 3.3V VDIFF = 40V
* *
*
1.225 1.225 -4.5 -9 -15
Line Regulation (Note 1) Load Regulation (Note 1)
RLINE
3.0V VDIFF 40V, Vout = Vref, TA = 25C 3.3V VDIFF 40V, Vout = Vref
RLOAD
VDIFF = 3.0V, 10mA IL 1.5A, TA = 25C VDIFF = 3.3V, 10mA IL 1.5A VDIFF = 40V, 10mA IL 300mA, TA = 25C VDIFF = 40V, 10mA IL 195mA
* *
-15 -15 -15 -5
Thermal Regulation
VRTH
Vin = 14.6V, IL = 1.5A Pd = 20 Watts, t = 20 ms, TA = 25C
Ripple Rejection (Note 2) Adjustment Pin Current
RN
f = 120 Hz, Vout = Vref CAdj = 10 F, Iout = 100 mA
*
66
dB
IAdj
VDIFF = 3.0V, TA = 25C VDIFF = 3.3V VDIFF = 40V
100
* *
-5
100 100 5 5 5 5 5 5 5.0
A
Adjustment Pin Current Change
IAdj
VDIFF = 3.0V, 10mA IL 1.5A, TA = 25C VDIFF = 3.3V, 10mA IL 1.5A VDIFF = 40V, 10mA IL 300mA, TA = 25C VDIFF = 40V, 10mA IL 195mA 3.0V VDIFF 40V, TA = 25C 3.3V VDIFF 40V
* * * * * *
-5 -5 -5 -5 -5
A
Miminum Load Current
ILmin
VDIFF = 3.0V, VOUT = 1.4V (forced) VDIFF = 3.3V, VOUT = 1.4V (forced) VDIFF = 40V, VOUT = 1.4V (forced)
5.0 5.0 1.5 0.18 3.5 1.5
mA
Current Limit (Note 2)
ICL
VDIFF = 15V VDIFF = 40V, TA = 25C
A
Notes: 1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used. Changes in output voltage due to heating effects must be taken into account separately. 2. If not tested, shall be guaranteed to the specified limits. 3. The * denotes the specifications which apply over the full operating temperature range.
3.3 STANDARD APPLICATION
* CIN is required if regulator is located an appreciable distance from power supply filter. ** CO is not needed for stability, however it does improve transient response. VOUT = 1.25V (1 + R1 R2 ) + IAdj R2
VIN VOUT R1 240 Adjust +C
OUT** 1.0F
OM7602ST
IAdj CIN* 0.1F
Since IAdj is controlled to less than 100A, the error associated with this term is negligible in most applications.
R2
3.3 - 132
OM7602ST
TYPICAL PERFORMANCE CHARACTERISTICS
LOAD REGULATION
VO, OUTPUT VOLTAGE CHANGE (%) 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -75 VI = 15V VO = 10V IL = 1.5A IL = 0.5A IO, OUTPUT CURRENT (A)
4
CURRENT LIMIT
3
TJ = 25C
2
TJ = 150C TJ = -55C
1
0 -50 -25 0 25 50 75 100 125 150 TJ, JUNCTION TEMPERATURE (C) 30 10 20 40 0 VI - VO, INPUT - OUTPUT VOLTAGE DIFFERENTIAL (Vdc )
ADJUSTMENT PIN CURRENT
IAdj, ADJUSTMENT PIN CURRENT (A) 3.0 VI - VO, INPUT-OUTPUT VOLTAGE 70 65 60 55 50 45 40 35 -75 -50 -25 0 25 50 75 100 125 150 TJ, JUNCTION TEMPERATURE (C)
DROPOUT VOLTAGE
VO = 100mV
DIFFERENTIAL (Vdc)
2.5
IL = 1.5A IL = 1.0A
2.0 IL = 500mA 1.5 IL = 20mA 1.0 -75 -50 50 75 100 125 150 -25 0 25 TJ, JUNCTION TEMPERATURE (C) IL = 200mA
1.260 Vref, REFERENCE VOLTAGE (V)
TEMPERATURE STABILITY
IB, QUIESCENT CURRENT (mA)
5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0
MINIMUM OPERATING CURRENT
TJ = -55C TJ = 25C TJ = 150C
3.3
1.250
1.240
1.230
1.220 -75
-50
50 75 100 125 150 -25 0 25 TJ, JUNCTION TEMPERATURE (C)
30 40 0 10 20 VI - VO, INPUT - OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
3.3 - 133
OM7602ST
TYPICAL APPLICATIONS
ADJUSTABLE CURRENT LIMITER
+25V
OM7602ST
5V ELECTRONIC SHUT DOWN REGULATOR
IO 1N4002 VIN OM7602ST VO + 120 Adjust MPS2222 720 1K TTL Control 1.0F D1
VOUT R1 1.25 Adjust R2
VO
VIN
DIN IN4001 DIN IN4001 2N5640
* To provide current limiting of IO to 100 the system ground, the source of the FET must be tied to a negative voltage below -1.25 V. Vref Vref R2 R1 = IDSS IOmax + IDSS VO < BVDSS + 1.25 V + VSS ILmin - IDSS < IO < 1.5 A As shown 0 < IO < 1 A
Minimum VOUT = 1.25 V
VSS
D1 protects the device during an input short circuit.
SLOW TURN-ON REGULATOR
CURRENT REGULATOR
VIN
OM7602ST OM7602ST
VOU
R1
IOUT
240
IN4001
Adjust R2
MPS2907
Adjust 50 K
+
IAdj
10 F
(V ) + IAdj 1.25 V IOUT = REF @ R1 R1 10mA IOUT 1.5 A
MECHANICAL OUTLINE
.420 .410 .200 .190 .045 .035 .665 .645 .537 .527 .430 .410 .038 MAX.
PIN CONNECTION
Tab
3.3
.150 .140
.750 .500
.005
1
2
3
.035 .025
.100 TYP.
.120 TYP.
NOTES
* Case is metal/hermetically sealed * Isolated Tab
ISOLATED Front View Pin 1: Adjust Pin 2: Output Pin 3: Input Tab: Isolated
NON-ISOLATED Front View Pin 1: Adjust Pin 2: Output Pin 3: Input Tab: Output
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246

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