OM7603ST ISOLATED HERMETIC TO-257AA ADJUSTABLE VOLTAGE REGULATOR Three Terminal, Adjustable Voltage, 1.5 Amp Precision Negative 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 MIL-STD -883 Similar To Industry Standard P/N LM137 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, 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 @ 25°C Input-Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to +150°C Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65° to +150°C Typical Power/Thermal Characteristics: Rated Power @ 25°C TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.5W TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W Thermal Resistance qJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W qJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W Note: This device is also available in a non-isolated JEDEC TO-257AA package. Use part number OM7603NT for non-isolated unit. 4 11 R4 Supersedes 1 07 R3 3.3 - 137 3.3 OM7603ST 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 -1.262 -1.238 -1.220 -1.280 -1.220 -4.5 4.5 -13.8 13.8 -25 25 VDIFF = 12V, 8mA IL 1.5A, TA = 25°C -25 25 VDIFF -25 25 -50 50 -5 5 VDIFF = 40V RLINE 3.0 V (Note 1) Load Regulation VDIFF 3.0V VDIFF 40V VRTH • • 40V, 8mA IL 1.5A, TA = 25°C VDIFF = 40V, 8mA IL 1.5A Thermal Regulation • • 40V, TA = 25°C VDIFF = 5V, 8mA IL 1.5A RLOAD (Note 1) Max. -1.280 VDIFF = 3.0V Line Regulation Min. • Vin = -14.6V, IL = 1.5A Unit V mV mV mV Pd = 20 Watts, t = 10 ms, TA = 25°C Ripple Rejection RN (Note 2) Adjustment Pin Current f = 120 Hz, Vout = Vref • 66 dB CAdj = 10 µF, Iout = 100 mA IAdj VDIFF = 3.0V VDIFF = 40V Adjustment Pin ³IAdj Current Change (line) 3V VDIFF 40V • • 100 • -5 • • • • • -5 100 µA 5 µA 5 µA ³IAdj Miminum Load Current (load) VDIFF = 5V, 8mA IL 1.5A ILmin VDIFF = 3.0V, Vout = -1.4V (forced) VDIFF = 10V, Vout = -1.4V (forced) VDIFF = 40V, Vout = -1.4V (forced) Current Limit (Note 2) ICL VDIFF 5V VDIFF = 40V, TA = 25°C 3.0 3.0 mA 5.0 1.5 3.5 0.24 1.2 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 - 138 OM7603ST TYPICAL PERFORMANCE APPLICATIONS 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 -0.8 -0.8 VO = -10V -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 IB, Quiescent Current (mA) 1.240 00 25 25 50 50 75 75 100 100 125125150 150 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 1.8 TJ = -55°C 1.6 TJ = 25°C 3.3 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 - 139 OM7603ST TYPICAL APPLICATIONS HIGH STABILITY REGULATOR DUAL TRACKING SUPPLY ±1.25V TO ±20V OM7602ST VIN VOUT Adj +VI R2* 7V LM329B + + + 1µF Solid Tantalum R1 1k 1% R3 1.5K 1% 1µF Solid Tantalum R2 5K 1% R4 5k 1% + + VOUT OM7603ST *R2 = (VOut) 9.08 x 10-3 10µF -VOUT + - 908 -VIN R1** 100 1% 1µF* 10µF Adj VIN -VIN +VOU + 2.2* µF D1 IN4002 + 2.2* µF D2 IN4002 R3 5K R5** 100 1% 1µF* Adj VIN VOUT OM7603ST -VOUT * Solid Tantalum ** R1 or R5 may be trimmed slightly to improve tracking. STANDARD APPLICATION * CIN is required if regulator is located more than 4 inches from power supply filter. A 1µF solid tantalum or 10µF aluminum electrolytic is recommended. IPRO + ** CO is necessary for stability. A 1µF solid tantalum or 10µF aluminum electrolytic is recommended. CIN* VOUT = -1.25V (1 + R2 ) VOUT = -1.25V (1 + R1 CO* R1 120 1.0µF IAd -VIN MECHANICAL OUTLINE VI VOU -VOUT OM7603ST PIN CONNECTION .200 .190 .420 .410 3.3 + R2 1.0µF .045 .035 Tab .665 .645 .150 .140 .537 .527 .430 .410 .038 MAX. .750 .500 .005 1 .035 .025 .100 TYP. NOTES • Case is metal/hermetically sealed • Isolated Tab .120 TYP. ISOLATED Front View Pin 1: Adjust Pin 2: Input Pin 3: Output Tab: Isolated 2 3 NON-ISOLATED Front View Pin 1: Adjust Pin 2: Input Pin 3: Output Tab: Input 205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246