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LM5642XMT bảng dữ liệu(PDF) 5 Page - Texas Instruments |
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LM5642XMT bảng dữ liệu(HTML) 5 Page - Texas Instruments |
5 / 40 page LM5642, LM5642X www.ti.com SNVS219K – JUNE 2003 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS Unless otherwise specified, VIN = 28V, GND = PGND = 0V, VLIN5 = VDD1 = VDD2. Limits appearing in boldface type apply over the specified operating junction temperature range, (-40°C to +125°C, if not otherwise specified). Specifications appearing in plain type are measured using low duty cycle pulse testing with TA = 25°C (1), (2). Min/Max limits are specified by design, test, or statistical analysis. Symbol Parameter Conditions Min Typ Max Units System ΔVOUT/VOUT Load Regulation VIN = 28V, Vcompx = 0.5V to 1.5V 0.04 % Line Regulation 5.5V ≤ VIN ≤ 36V, Vcompx =1.25V 0.04 % VFB1_FB2 Feedback Voltage 5.5V ≤ VIN ≤ 36V 1.2154 1.2364 1.2574 V -20°C to 85°C 1.2179 1.2364 1.2549 IVIN Input Supply Current VON_SSx > 2V 1.1 2.0 mA 5.5V ≤ VIN ≤ 36V Shutdown (3) 50 110 µA VON_SS1 = VON_SS2= 0V VLIN5 VLIN5 Output Voltage IVLIN5 = 0 to 25mA, 4.70 5 5.30 V 5.5V ≤ VIN ≤ 36V VCLos Current Limit Comparator VIN = 6V ±2 ±7.0 mV Offset (VILIMX −VRSNSX) ICL Current Limit Sink Current 8.4 9.9 11.4 µA Iss_SC1, Soft-Start Source Current VON_ss1 = VON_ss2 = 1.5V (on) 0.5 2.4 5.0 µA Iss_SC2 Iss_SK1, Soft-Start Sink Current VON_ss1 = VON_ss2 = 1.5V 2 5.5 10 µA Iss_SK2 VON_SS1, Soft-Start On Threshold 0.7 1.12 1.4 V VON_SS2 VSSTO Soft-Start Timeout (4) 3.4 V Threshold Isc_uvdelay UV_DELAY Source Current UV-DELAY = 2V 2 5 9 µA Isk_uvdelay UV_DELAY Sink Current UV-DELAY = 0.4V 0.2 0.48 1.2 mA VUVDelay UV_DELAY Threshold 2.3 V Voltage VUVP FB1, FB2, Under Voltage As a percentage of nominal output voltage 75 80.7 86 % Protection Latch Threshold (falling edge) Hysteresis 3.7 % VOVP VOUT Overvoltage As a percentage measured at VFB1, VFB2 107 114 122 % Shutdown Latch Threshold Swx_R SW1, SW2 ON-Resistance VSW1 = VSW2 = 0.4V 420 487 560 Ω (1) A typical is the center of characterization data measured with low duty cycle pulse tsting at TA = 25°C. Typicals are not ensured. (2) All limits are specified. All electrical characteristics having room-temperature limits are tested during production with TA = TJ = 25°C. All hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control. (3) Both switching controllers are off. The linear regulator VLIN5 remains on. (4) When SS1 and SS2 pins are charged above this voltage and either of the output voltages at Vout1 or Vout2 is still below the regulation limit, the under voltage protection feature is initialized. Copyright © 2003–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM5642 LM5642X |
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