OM7620ST 1.5 AMP HIGH VOLTAGE POSITIVE ADJUSTABLE REGULATOR Three Terminal, High Voltage, Precision Adjustable Positive Voltage Regulator In Hermetic JEDEC TO-257AA FEATURES • • • • • • • Similar To Industry Standard LT117AHV Adjustable Output Voltage Built In Thermal Overload Protection Short Circuit Current Limiting Available In Isolated and Non-Isolated Package Maximum Output Voltage Tolerance Is Guaranteed To ±1% Available Hi-Rel Screened 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, these devices can deliver up to 1.5 amps of output current. The unit also features output voltages that can be fixed from 1.2 volts to 57 volts using external resistors. ABSOLUTE MAXIMUM RATINGS @ 25°C Power Dissipation (Pd) (Internally Limited) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 W Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 V Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65°C to + 150°C Lead Temperature (Soldering 10 seconds). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C Thermal Resistance: qJC (Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W qJC (Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W qJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W Maximum Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A 4 11 R0 3.3 - 169 3.3 OM7620ST ELECTRICAL CHARACTERISTICS -55°C TA 125°C, IL = 8mA (unless otherwise specified) Parameter Symbol Test Conditions Reference Voltage VREF VDIFF = 3.0V, TA = 25°C VDIFF = 3.3V VDIFF = 40V VDIFF = 60V Line Regulation RLINE (Note 1) Min. 1.238 1.262 1.225 1.270 1.225 1.270 1.225 1.270 -4.5 4.5 -9 9 -5 5 • -10 10 -15 15 • -15 15 -15 15 -15 15 -15 15 -5 5 • • • 3.0V VDIFF 40V, VOUT = Vref, TA = 25°C 3.3V VDIFF 40V, VOUT = Vref • 40V VDIFF 60V, VOUT = Vref, TA = 25°C 40V VDIFF 60V, VOUT = Vref Load Regulation RLOAD (Note 1) VDIFF = 3.0V, 10mA IL 1.5A, TA = 25°C VDIFF = 3.3V, 10mA IL 1.5A VDIFF = 40V, 10mA IL 300mA, TA = 25°C VDIFF = 40V, 10mA IL 195mA VDIFF = 60V, 10mA IL 30mA Thermal Regulation VRTH Max. • • VIN = 14.6V, IL = 1.5A Unit V mV mV mV Pd = 20 Watts, t = 20 ms, TA = 25°C Ripple Rejection RN (Note 2) Adjustment Pin Current f = 120 Hz, VOUT = Vref VDIFF = 3.0V, TA = 25°C VDIFF = 40V VDIFF = 60V ³IAdj Current Change VDIFF = 3.0V, 10mA IL 1.5A, TA = 25°C VDIFF = 3.3V, 10mA IL 1.5A VDIFF = 40V, 10mA IL 195mA • • 3.0V VDIFF 40V, TA = 25°C 3.3V VDIFF 40V 3.3V VDIFF 60V ILmin VDIFF = 40V, VOUT = 1.4V (forced) 3.3 VDIFF = 60V, VOUT = 1.4V (forced) (Note 2) ICL • • 100 VDIFF = 5V µA 100 100 -5 5 -5 5 -5 5 -5 5 -5 5 -5 5 -5 5 VDIFF = 3.0V, VOUT = 1.4V (forced), TA = 25°C VDIFF = 3.3V, VOUT = 1.4V (forced) Current Limit dB 100 • • • VDIFF = 40V, 10mA IL 300mA, TA = 25°C Miminum Load Current 66 CAdj = 10 µF, IOUT = 100 mA IAdj VDIFF = 3.3V Adjustment Pin • µA 5 • • • • 5 mA 5 7 1.5 3.5 VDIFF = 40V, TA = 25°C 0.3 1.5 VDIFF = 60V, TA = 25°C 0.05 0.50 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 - 170 OM7620ST TYPICAL APPLICATIONS LOAD REGULATION CURRENT LIMIT 0.4 0.4 0.2 0.2 IO, Output Current (A) ³VO, Output Voltage Change (%) 4 IL = 0.5A 0 0 -0.2 -0.2 -0.4 -0.4 IL = 1.5A -0.6 -0.6 VI = 15V VO = 10V -0.8 -0.8 -1.0 -1.0 3 TJ = 25°C 2 TJ = 55°C TJ = 150°C 1 0 -75 -75 -50 -25 -25 -50 00 25 25 50 50 100 125 150 75 100 125 150 75 0 TJ, Junction Temperature (C°) VI - VO, Input - Output Voltage Differential (Vdc) IAdj, Adjustment Pin Current (µA) ADJUSTMENT PIN CURRENT 70 70 65 65 60 60 55 55 50 50 45 45 40 40 35 35 -75 -50 -75 -50 -25 -25 0 0 25 25 50 50 75 100 125 150 75 100 125 150 TJ, Junction Temperature (C°) TEMPERATURE STABILITY IB, Quiescent Current (mA) Vref, Reference Voltage (V) 1.250 1.250 1.240 1.240 1.230 1.230 00 25 25 20 30 40 DROPOUT VOLTAGE 3.0 3.0 ³VO = 100mV 2.5 2.5 IL = 1.5A IL = 1.0A 2.0 2.0 IL = 500mA 1.5 1.5 IL = 20mA IL = 200mA 1.0 1.0 -75 125 150 -75 -50 -50 -25 -25 00 25 100 125 150 25 50 50 75 75 100 TJ, Junction Temperature (C°) MINIMUM OPERATING CURRENT 1.260 1.260 1.220 1.220 -75 -50 -50 -25 -25 -75 10 VI - VO, Input - Output Voltage Differential (Vdc) 100 125 75 100 125 150 150 50 75 50 5.0 5.0 4.5 4.5 4.0 4.0 3.5 3.5 3.0 3.0 2.5 2.5 2.0 2.0 1.5 1.5 1.0 1.0 0.5 0.5 0 0 TJ = 55°C TJ = 25°C TJ = 150°C 00 TJ, Junction Temperature (C°) 10 10 20 20 30 30 40 40 3.3 VI - VO, Input - Output Voltage Differential (Vdc) STANDARD APPLICATION VOUT VIN * 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 = 1.25 V (1 + R2 )+ IAdj R2 R1 Since IAdj is controlled to less than 100 µA, the error associated with this term is negligible in most applications. 3.3 - 171 OM7620ST R1 240 IAdj Adjust CIN* 0.1 µF Co** 1.0 µF R2 OM7620ST TYPICAL APPLICATIONS ADJUSTABLE CURRENT LIMITER +25V VOUT R1 5 V ELECTRONIC SHUT DOWN REGULATOR D1 IO VO 1N4002 OM7620ST VIN 1.25 1.0µF * To provide current limiting of IO to the system ground, the source of the FET must be tied to a negative voltage below -1.25 V. R2 VREF IDSS 120 VIN R2 Adjust VOUT OM7620ST VIN Adjust 100 MPS2222 R1 = TTL Control 720 VREF IOmax + IDSS 1K 2N5640 Minimum VOUT = 1.25 V VO < BVDSS + 1.25 V + VSS ILmin – IDSS < IO < 1.5 A As shown 0 < IO < 1 A Vss* D1 protects the device during an input short circuit. SLOW TURN-ON CURRENT VIN CURRENT REGULATOR VOUT VIN OM7620ST VOUT R1 IOUT OM7620ST 240 IN4001 IAdj Adjust Adjust 50 K MPS2907 R2 + (V ) + IAdj 1.25 V IOUT = REF @ R1 R1 10 µF 10mA IOUT 1.5 A MECHANICAL OUTLINE CONNECTION DIAGRAM .200 .190 .420 .410 .045 .035 Tab .665 .645 .150 .140 .537 .527 3.3 .430 .410 .038 MAX. .750 .500 .035 .025 .100 TYP. .005 1 .120 TYP. Isolated NOTES • Case is metal/hermetically sealed • Isolated Tab Front View Pin 1 - Adjust Pin 2 - Output Pin 3 - Input Tab - Isolated 2 3 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