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LP3982IMM-1.8 Datasheet(PDF) 3 Page - Texas Instruments |
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LP3982IMM-1.8 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 23 page OFF THERMAL PROTECTION 1.25V BANDGAP FAST START-UP CIRCUIT CURRENT LIMIT FAULT COMPARATORS R1 R2 VIN VO SET CC SHDN FAULT GND ERROR AMP + - LP3982 www.ti.com SNVS185D – FEBRUARY 2002 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS (continued) Unless otherwise specified, all limits specified for VIN = VO +0.5V (1), V SHDN = VIN, CIN = COUT = 2.2μF, CCC = 33nF, TJ = 25°C. Boldface limits apply for the operating temperature extremes: −40°C and 85°C. Symbol Parameter Conditions Min(2) Typ(3) Max(2) Units VDO Dropout Voltage(1)(4) IOUT = 1 mA 0.4 IOUT = 200 mA 80 220 mV IOUT = 300 mA 120 ΔVO Line Regulation IOUT = 1 mA, (VO + 0.5V) ≤ VI ≤ 6V (1) −0.1 0.01 0.1 %/V Load Regulation 100 μA ≤ IOUT ≤ 300 mA 0.002 %/mA en Output Voltage Noise IOUT = 10 mA, 10 Hz ≤ f ≤ 100 kHz 37 μVRMS Output Voltage Noise Density 10 Hz ≤ f ≤ 100 kHz, COUT = 10 μF 190 nV/ √Hz VSHDN SHDN Input Threshold VIH, (VO + 0.5V) ≤ VI ≤ 6V (1) 2 V VIL, (VO + 0.5V) ≤ VI ≤ 6V (1) 0.4 ISHDN SHDN Input Bias Current SHDN = GND or IN 0.1 100 nA ISET SET Input Leakage SET = 1.3V, Adjust Version Only(5) 0.1 2.5 nA VFAULT FAULTDetection Voltage VO ≥ 2.5V, IOUT = 200 mA (6) 120 280 mV FAULT Output Low Voltage ISINK = 2 mA 0.115 0.25 V IFAULT FAULT Off-Leakage Current FAULT = 3.6V, SHDN = 0V 0.1 100 nA TSD Thermal Shutdown Temperature 160 °C Thermal Shutdown Hysteresis 10 TON Start-Up Time COUT = 10 μF, VO at 90% of Final 120 μs Value (4) Dropout voltage is measured by reducing VIN until VO drops 100mV from its nominal value at VIN -VO = 0.5V. Dropout Voltage does not apply to the 1.8 version. (5) The SET pin is not externally connected for the fixed versions. (6) The FAULT detection voltage is specified for the input to output voltage differential at which the FAULT pin goes active low. FUNCTIONAL BLOCK DIAGRAM Figure 1. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LP3982 |
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