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LM317 数据表(PDF) 3 Page - Texas Instruments |
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LM317 数据表(HTML) 3 Page - Texas Instruments |
3 / 22 page www.ti.com Recommended Operating Conditions Electrical Characteristics LM317 3-TERMINAL ADJUSTABLE REGULATOR SLVS044R – SEPTEMBER 1997 – REVISED APRIL 2007 MIN MAX UNIT VI – VO Input-to-output differential voltage 3 40 V IO Output current 1.5 A TJ Operating virtual junction temperature 0 125 °C over recommended ranges of operating virtual junction temperature (unless otherwise noted) PARAMETER TEST CONDITIONS(1) MIN TYP MAX UNIT TJ = 25°C 0.01 0.04 Line regulation(2) VI – VO = 3 V to 40 V %/V TJ = 0°C to 125°C 0.02 0.07 VO ≤ 5 V 25 mV CADJ = 10 µF,(3) TJ = 25°C VO ≥ 5 V 0.1 0.5 %VO Load regulation IO = 10 mA to 1500 mA VO ≤ 5 V 20 70 mV TJ = 0°C to 125°C VO ≥ 5 V 0.3 1.5 %VO Thermal regulation 20-ms pulse, TJ = 25°C 0.03 0.07 %VO/W ADJUST terminal current 50 100 µA Change in VI – VO = 2.5 V to 40 V, PD ≤ 20 W, IO = 10 mA to 1500 mA 0.2 5 µA ADJUST terminal current Reference voltage VI – VO = 3 V to 40 V, PD ≤ 20 W, IO = 10 mA to 1500 mA 1.2 1.25 1.3 V Output-voltage TJ = 0°C to 125°C 0.7 %VO temperature stability Minimum load current VI – VO = 40 V 3.5 10 mA to maintain regulation VI – VO ≤ 15 V, PD < PMAX(4) 1.5 2.2 Maximum output current A VI – VO ≤ 40 V, PD < PMAX (4), TJ = 25°C 0.15 0.4 RMS output noise voltage f = 10 Hz to 10 kHz, TJ = 25°C 0.003 %VO (% of VO) CADJ = 0 µF(3) 57 Ripple rejection VO = 10 V, f = 120 Hz dB CADJ = 10 µF(3) 62 64 Long-term stability TJ = 25°C 0.3 1 %/1k hr (1) Unless otherwise noted, the following test conditions apply: |VI – VO| = 5 V and IOMAX = 1.5 A, TJ = 0°C to 125°C. Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. (2) Line regulation is expressed here as the percentage change in output voltage per 1-V change at the input. (3) CADJ is connected between the ADJUST terminal and GND. (4) Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability. 3 Submit Documentation Feedback |
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类似说明 - LM317 |
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