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TPS73HD301PWP Datasheet(PDF) 3 Page - Texas Instruments |
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TPS73HD301PWP Datasheet(HTML) 3 Page - Texas Instruments |
3 / 28 page TPS73HD301, TPS73HD318, TPS73HD325 DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS SLVS167C – SEPTEMBER 1998 – REVISED – MAY 1999 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Input voltage range, VI (xIN, xRESET, xSENSE, xEN) –0.3 V to 11 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Differential input voltage,VID (1GND to 2GND) 2 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output current, IO (1OUT, 2OUT) 2 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous total power dissipation See Dissipation Rating Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA –40 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg –65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds 260 °C . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltages are with respect to GND. DISSIPATION RATING TABLE 1 – FREE-AIR TEMPERATURES‡ PACKAGE AIR FLOW (CFM) TA < 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING PWP‡ 0 2.9 W 23.5 mW/ °C 1.9 W 1.5 W PWP‡ 300 4.3 W 34.6 mW/ °C 2.8 W 2.2 W PWP§ 0 3 W 23.8 mW/ °C 1.9 W 1.5 W PWP§ 300 7.2 W 57.9 mW/ °C 4.6 W 3.8 W ‡ This parameter is measured with the recommended copper heat sink pattern on a 1-layer PCB, 5-in × 5-in PCB, 1 oz. copper, 2-in × 2-in coverage (4 in2). § This parameter is measured with the recommended copper heat sink pattern on a 8-layer PCB, 1.5-in × 2-in PCB, 1 oz. copper with layers 1, 2, 4, 5, 7, and 8 at 5% coverage (0.9 in2) and layers 3 and 6 at 100% coverage (6 in2). recommended operating conditions MIN MAX UNIT Input voltage, VI† Adjustable output (regulator #1) 2.97 10 V Input voltage, VI† 3.3–V output (regulator #2) 3.97 10 V High-level input voltage at EN, VIH 2 V Low-level input voltage at EN, VIL 0.5 V Total output current range (per regulator), IO 0 750 mA Operating virtual junction temperature range, TJ –40 125 °C † Minimum input voltage defined in the recommended operating conditions is the maximum specified output voltage plus dropout voltage, VDO, at the maximum specified load range (750 mA). Since dropout voltage is a function of output current, the usable range can be extended for lighter loads. To calculate the minimum input voltage for the maximum load current used in a given application, use the following equation: V I(min) + V O(max) ) V DO(max load) Because regulator 1 of the TPS373HD301 is programmable, rDS(on) should be used to calculate VDO before applying the above equation. The equation for calculating VDO from rDS(on) is given in Note 3 in the TPS73HD301 electrical characteristics table. The minimum value of 3.5 V is the absolute lower limit for the recommended input voltage range for the TPS73HD301. With 2.97-V input voltage, the LDO may be in dropout and will not meet the 3% regulaotr output or 750-mA load current specification. |
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