OM7612ST 1.5 AMP HIGH VOLTAGE NEGATIVE ADJUSTABLE REGULATOR Three Terminal, High Voltage, Precision Adjustable Negative Voltage Regulator In Hermetic JEDEC TO-257AA Package FEATURES • • • • • • • Similar To Industry Standard LT137AHV 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 negative 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 -47 volts. ABSOLUTE MAXIMUM RATINGS @ 25°C Power Dissipation (Pd) (Internally Limited). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 W Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 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 - 161 3.3 OM7612ST ELECTRICAL CHARACTERISTICS -55°C TA 125°C, IL = 8mA (unless otherwise specified) Parameter Symbol Test Conditions Min. Max. Reference Voltage VREF VDIFF = 3.0V, TA = 25°C -1.262 -1.238 -1.28 -1.22 -1.28 -1.22 -1.28 -1.22 -6 6 VDIFF = 3.0V • VDIFF = 50V, TA = 25°C VDIFF = 50V Line Regulation RLINE 3.0 V VDIFF 50V, TA = 25°C RLOAD VDIFF 50V, 8mA IL 110mA, TA = 25°C (Note 1) Load Regulation • • (Note 1) VDIFF = 5V, 8mA IL 1.5A, TA = 25°C • Thermal Regulation VRTH Vin = -14.6V, IL = 1.5A -20 20 -25 25 -25 25 -50 50 -5 5 Unit V mV mV mV Pd = 20 Watts, t = 10 ms, TA = 25°C Ripple Rejection RN (Note 2) Adjustment Pin Current Adjustment Pin IAdj Current Limit (Note 2) • 66 dB VDIFF = 3.0V • 100 VDIFF = 40V • 100 VDIFF = 50V • 100 ³IAdj VDIFF = 5V, 8mA IOUT 1.5A • -5 5 3V VDIFF 50V, IL 8mA • -6 6 ILmin VDIFF = 3.0V, VOUT = -1.4V (forced) • 3 VDIFF = 10V, VOUT = -1.4V (forced) • 3 VDIFF = 40V, VOUT = -1.4V (forced) • 5 Current Change Miminum Load Current f = 120 Hz, VOUT = Vref CAdj = 10 µF, IOUT = 100 mA ICL VDIFF = 50V, VOUT = -1.4V (forced) • VDIFF = 5V • VDIFF = 50V, TA = 25°C µA µA mA 5 1.5 3.5 0.2 1.0 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 3.3 - 162 OM7612ST TYPICAL PERFORMANCE CHARACTERISTICS LOAD REGULATION CURRENT LIMIT 4 4 IO, Output Current (A) -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 -1.2 -1.2 TJ = -25°C 3 3 TJ = -150°C 2 1 1 0 0 -1.4 -1.4 -50 -25 -75-50 -25 0 0 25 25 50 50 75 75 125 100 100 125 150 150 00 1010 3030 4040 VI - VO, Input - Output Voltage Differential (Vdc) ADJUSTMENT PIN CURRENT DROPOUT VOLTAGE 75 75 70 70 65 65 60 60 55 55 50 50 45 45 40 40 -50 -75 -50 -25 -25 00 25 25 50 50 150 75 100 100 125 125 150 75 3.0 3.0 VO = -5V ³VO = 100mV 2.5 2.5 IL = 1.0A 2.0 2.0 IL = 200mA 1.5 1.5 IL = 20mA 1.0 1.0 -50 -50 25 25 50 50 75 75 100 100 125125150 150 TJ = -55°C IB, Quiescent Current (mA) 1.8 1.240 00 MINIMUM OPERATING CURRENT 1.270 1.250 -25 -25 TJ, Junction Temperature (C°) TEMPERATURE STABILITY 1.260 IL = 1.5A IL = 500mA TJ, Junction Temperature (C°) Vref, Reference Voltage (V) 20 20 TJ, Junction Temperature (C°) 80 80 IAdj, Adjustment Pin Current (µA) TJ = -55°C IL = 0.5A 0 0 VI - VO, Input - Output Voltage Differential (Vdc) ³VO, Output Voltage Change (%) 0.2 0.2 TJ = 25°C 1.6 TJ = 150°C 1.4 1.2 1.0 0.8 0.6 0.4 0.2 1.230 -75 -50 -25 0 25 50 75 0 100 125 150 0 TJ, Junction Temperature (C°) 10 20 30 40 VI - VO, Input - Output Voltage Differential (Vdc) 3.3 - 163 3.3 OM7612ST TYPICAL APPLICATIONS HIGH STABILITY REGULATOR DUAL TRACKING SUPPLY ±1.25V TO ±20V +VIN R2* 7V LM329B 1µF* + + 1µF Solid Tantalum R1 1k 1% R3 1.5K 1% 1µF Solid Tantalum + 10µF Adj VIN -VIN OM7620ST VOUT VIN Adj + VOUT OM7612ST *R2 = (VOUT) 9.08 x 10-3 10µF -VOUT - 908 R2 5K 1% R4 5k 1% 1µF* -VIN +VOUT R1** 100 1% 2.2* µF D1 IN4002 2.2* µF D2 IN4002 R3 5K R5** 100 1% Adj VIN VOUT OM7612ST -VOUT * Solid Tantalum ** R1 or R2 may be trimmed slightly to improve tracking. * CIN is required if regulator is located more than 4 inches from power supply filter. A 1 µF solid tantalum or 10 µF aluminum electrolytic is recommended. IPROG + CIN* + R2 1.0µF CO** R1 120 1.0µF ** CO is necessary for stability. A 1 µF solid tantalum or 10 µF aluminum electrolytic is recommended. IAdj VIN -VIN VOUT -VOUT OM7612ST VOUT = -1.25 V (1 +R2) R1 CONNECTION DIAGRAM MECHANICAL OUTLINE Tab .045 .035 .665 .645 .150 .140 3.3 .200 .190 .420 .410 .537 .527 .430 .410 .038 MAX. .750 .500 1 Isolated 2 .005 3 Non-Isolated Front View Pin 1 - Adjust Pin 2 - Input Pin 3 - Output Tab - Isolated Front View Pin 1 - Adjust Pin 2 - Input Pin 3 - Output Tab - Input .035 .025 .100 TYP. NOTES • Case is metal/hermetically sealed • Isolated Tab 205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246 .120 TYP.