OM7604ST ISOLATED HERMETIC TO-257AA ADJUSTABLE VOLTAGE REGULATOR Three Terminal, Adjustable Voltage, 3.0 Amp Precision Positive Regulator In A Hermetic JEDEC TO-257AA Package FEATURES • • • • • • Isolated Hermetic Package, JEDEC TO-257AA Outline Reference Voltages Set To ±2% (±1% Available) Built-In Thermal Overload Protection Short Circuit Current Limiting Product Is Available Screened To MIL-STD-883 Similar To Industry Standard P/N LM150A DESCRIPTION These three terminal positive 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, 0.3% load regulation and 0.01% line regulation. ABSOLUTE MAXIMUM RATINGS @ 25°C Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +35V 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25W TA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W Thermal Resistance qJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W qJA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W Note: For ±1% device, add letter "A" in front of part number (e.g. OMA 7604ST). 4 11 R4 Supersedes 1 07 R3 3.3 - 141 3.3 OM7604ST ELECTRICAL CHARACTERISTICS Test Reference Voltage Symbol VREF -55°C TA 125°C (Note 1) unless otherwise specified Conditions Limits IOUT = 10mA Unit Min. Max. 1.20 1.30 V 1.20 1.30 V 0.01 %/V 0.05 %/ 17.5 mV 50 mV 0.35 % 1.0 % 0.01 %/W TA = 25°C 3.0V (VIN - VOUT) 35V, P 30W 10mA IOUT 3.0A (Note 2) Line Regulation ³VOUT 3.0V (VIN - VOUT) 35V, (Note 2) ³VIN IOUT = 10mA, TJ = 25°C 3.0V (VIN - VOUT) 35V, IOUT = 10mA Load Regulation ³VOUT 10mA IOUT 3.0A, (Note 2) ³IOUT VOUT 5.0A, TJ = 25°C 10mA IOUT 3.0A, VOUT 5.0A 10mA IOUT 3.0A, VOUT 5.0A, TJ = 25°C 10mA IOUT 3.0A, VOUT 5.0A Thermal Regulation 20ms pulse, TA =25°C Ripple Rejection ³VIN (Note 3) ³VREF Adjust Pin Current IAdj Adjust Pin ³IAdj Current Change VOUT = 10V, f = 120Hz 66 dB CADJ = 10µF 10mA IOUT 3.0A, IOUT = 10mA 100 µA 5.0 µA 5.0 mA 3.0V (VIN - VOUT) 35V Miminum Load Current IMIN (VIN - VOUT) = 35V Current Limit ICL (VIN - VOUT) 10V 3.0 A (VIN - VOUT) = 30V 0.3 A Notes: 1. Unless otherwise specified, these specifications apply for (VIN - VOUT) = 5.0V and IOUT = 1.5A. Although power dissipation is internally limited, these characteristics are applicable for power dissipation up to 30W. 2. Regulation is measured at a constant junction temperature using a pulse technique. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. 3. Guaranteed if not tested to the limits specified. 3.3 3.3 - 142 OM7604ST TYPICAL PERFORMANCE CHARACTERISTICS Load Regulation Current Limit 0.1 IOUT = 3A 0.2 0.3 TJ = 25°C 4 TJ = 150°C 2 0.4 0 0 Temperature (°C) IOUT = 20 mA 1 75 1.26 1.25 1.24 1.23 -50 -25 -0 25 50 75 100 125 150 125 Ripple Rejection 60 CADJ = 0 VIN - VOUT = 5V VOUT = 500mA f = 120Hz TJ = 25°C 5 CADJ = 10µF 80 60 CADJ = 0 40 VIN = 15V 20 VOUT = 10V IOUT = 500mA 0 10 15 20 25 30 35 10 100 1 CADJ = 0 COUT = 0 0.1 0.01 CADJ = 10µF COUT = 10µF 0.001 0.0001 10 100 1k 10k 100k Frequency (Hz) 1M Input Voltage Change(V) Output Impedance VIN = 15V VOUT = 10V IOUT = 500mA 3 TJ = 25°C 2 TJ = -55°C 1 0 5 10 15 20 25 30 35 40 1k 10k 100k 60 CADJ = 0 VIN = 15V 50 40 0.1 1M CADJ = 10µF 70 VOUT = 10V f = 120Hz TCASE = 25°C 1 Frequency (Hz) Output Voltage (Deviation (V) Output Voltage (V) 10 TJ = 150°C 4 Ripple Rejection 1.5 Line Transient Response 0 -0.5 Load Transient Response VOUT = 10V IOUT = 50mA TJ = 25°C CADJ = 0 COUT = 0 1 0.5 COUT = 1µF CADJ = 10µF -1 1 0.5 0 0 10 20 Time (µs) 3.3 - 143 30 10 Output Current (A) Output Voltage Deviation (V) 0 125 80 Load Current (A) 0 75 Input-Output Diffential(V) Ripple Rejection (dB) Ripple Rejection (dB) CADJ = 10µF 25 5 0 100 20 -25 Ripple Rejection 100 40 35 Temperature (°C) Temperature (°C) 80 40 Minimum Operating Current Minimum IOUT Current (mA) IOUT = 2 A Reference Voltage (V) Input-Output Differential (V) 2 25 45 Temperature Stability IOUT = 3 A -25 50 Temperature (°C) 1.27 2.5 0.5 -75 55 Input-Output Differential (V) ∆VOUT = 100 mV 1.5 60 30 -75 5 10 15 20 25 30 35 Dropout Voltage 3 Ripple Rejection (dB) Adjustment Current (µA) TJ = -55°C 0 0.5 -75 -50 -25 0 25 50 75 100 125 150 Output Impedance (Ohms) Adjustment Current 65 6 Output Current (A) Voltage Change (Percent) 1.0 40 1.5 1 0.5 0 -0.5 -1 -1.5 1.5 1 0.5 0 3.3 COUT = 0 CADJ = 0 COUT = 1µF CADJ = 10µF VIN = 15V, VOUT = 10V Preload = 100mA TJ = 25°C 0 10 20 Time (µs) 30 40 OM7604ST TYPICAL APPLICATIONS 1.2 - 2.5V Adjustable Regulator VIN Improving Ripple Rejection VOUT+ + VOUT Adj VIN + C2 +l 1µF 1K Adj 500 10µf* *Needed if device is far from filter capacitors. R2 + + VOUT = 1.25V 1+ R1 ) Remote Sensing +10V VOUT VIN VIN Adj 2k VOUT + C1 Precision High Current Reference VIN VIN *C1 improves ripple rejection, XC should be small compared to R2. ( VIN 0.5 5V R1 121 1% R2 365 1% R2 5k +l Optional - improves transient response. VOUT Adj 1µF R1 240 C1* 1µF VIN Adjustable Current Limiter Rp (Max Drop 300mV) VOUT 5V Adj 7 + 3 2k 15k 1% VIN 7 6 LT 1001 4 2 - 2.5V LT 1009 25 4.99k 1% 121 LT 301A + 1 8 365 - 2 6 4 100pF + 5µF - PIN CONNECTION .200 .190 .420 .410 .045 .035 Tab .665 .645 .150 .140 .537 .527 3.3 .430 .410 .038 MAX. .750 .500 .100 TYP. .035 .025 RET 25 Return MECHANICAL OUTLINE RL 3 1k .005 .120 TYP. NOTES • Case is metal/hermetically sealed • Isolated Tab 1 2 3 Front View Pin 1: Adjust Pin 2: VOUT Pin 3: VIN Tab: Isolated 205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246