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LM2645 데이터시트(PDF) 8 Page - National Semiconductor (TI) |
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LM2645 데이터시트(HTML) 8 Page - National Semiconductor (TI) |
8 / 20 page Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Voltages from the indicated pins to SGND/PGND: VIN, ILIM1, ILIM2, KS1, KS2, LDODRV −0.3V to 31V SW1, SW2, RSNS1, RSNS2 −0.3 to (V IN + 0.3)V VO1, VO2, FB1_FIX, FB2_FIX, VDD1, VDD2, EXT −0.3V to 6V SD, ON1, SS1, ON2, SS2, LDOFB, F SEL, UV_DELAY, PGOOD1, OUT3, PGOOD2, COMP1, COMP2, FPWM/2NDFB −0.3V to (VLIN5 +0.3)V CBOOT 1 to SW1, CBOOT2 to SW2 −0.3V to 7V LDRV1, LDRV2 −0.3V to (VDD+0.3)V HDRV1 to SW1, HDRV2 to SW2 −0.3V HDRV1 to CBOOT1, HDRV2 to CBOOT2 +0.3V Power Dissipation (T A = 25˚C, (Note 2) 1.56W Junction Temperature (T J) (Note 2) +150˚C Ambient Storage Temperature Range −65˚C to +150˚C Soldering Dwell Time, Temperature (Note 3) Wave Infrared Vapor Phase 4 sec, 260˚C 10sec, 240˚C 75sec, 219˚C ESD Rating (Note 4) 2kV Operating Ratings(Note 1) VIN (VIN and VLIN5 separate) 5.5V to 30V VIN (VLIN5 tied to VIN) 4.5V to 5.5V Junction Temperature 0˚C to +125˚C EXT 5.5V max. Electrical Characteristics Unless otherwise specified, V IN = 15V, SGND = PGND = 0V, VLIN5 = VDD1 = VDD2. Limits appearing in boldface type ap- ply over the entire operating junction temperature range, 0˚C to +125˚C. Specifications appearing in plain type are measured using low duty cycle pulse testing with T A = 25˚C (Note 5), (Note 6). Min/Max limits are guaranteed by design, test, or statisti- cal analysis. Symbol Parameter Conditions Min Typ Max Units SYSTEM ∆V OUT/VOUT Load Regulation V IN =15V, Vcompx = 0.5V to 1.5V 0.04 % ∆V OUT/VOUT Line Regulation 5.5V ≤ V IN ≤ 30V, Vcompx =1.25V 0.04 % V FBX_FIX Feedback Voltage in Adjustable Mode 5.5V ≤ VIN ≤ 30V 1.217 1.238 1.259 V V OUT V OUTx accuracy at fixed output mode 5.5V ≤ V IN ≤ 30V, VOUT1 = 5V, VOUT2 = 3.3V −2.4 +2.4 % I VIN Input Supply Current ON1 = ON2 = 5V and 5.5V ≤ V IN ≤ 30V 1.5 2.8 mA ON1 = ON2 = 5V and 4.5V ≤ V IN = VLIN5 ≤ 5.5V 1.3 2.8 mA Standby (Note 7) ON1 = ON2 = 0V, V SD =5V 50 120 µA Shutdown V SD =0V 5 30 µA VLIN5 VLIN5 Output Voltage(Note 8) IVLIN5 = 0 to 25mA, EXT = 0V, 5.5V ≤ VIN ≤ 30V, SD = 5V 4.65 5 5.35 V V CLos Current Limit Comparator Offset (VILIMX −VRSNSX) VKS1−VILIM1 = VKS2-VILIM2 =140mV ±2mV I CL Current Limit Sink Current 8 10 12 µA I ss_SC Soft-Start Source Current V ss1 =Vss2 =1V 0.5 2 3.5 µA I ss_SK Soft-Start Sink Current V ss1 =Vss2 =1V 24 µA V ssto Soft-Start Timeout Threshold (Note 9) 2V www.national.com 8 |
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