データシートサーチシステム |
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LM138KSTEEL データシート(PDF) 3 Page - Texas Instruments |
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LM138KSTEEL データシート(HTML) 3 Page - Texas Instruments |
3 / 23 page LM138, LM338 www.ti.com SNVS771B – MAY 1998 – REVISED APRIL 2013 Electrical Characteristics (continued) Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN − VOUT = 5V; and IOUT = 10 mA. (1) LM138 Symbol Parameter Conditions Units Min Typ Max θJA Thermal Resistance, Junction to NDS Package 35 °C/W Ambient (No Heat Sink) Electrical Characteristics LM338 Symbol Parameter Conditions Units Min Typ Max VREF Reference Voltage 3V ≤ (VIN − VOUT) ≤ 35V, 1.19 1.24 1.29 V 10 mA ≤ IOUT ≤ 5A, P ≤ 50W VRLINE Line Regulation 3V ≤ (VIN − VOUT) ≤ 35V (1) 0.005 0.03 %/V 0.02 0.06 %/V VRLOAD Load Regulation 10 mA ≤ IOUT ≤ 5A (1) 0.1 0.5 % 0.3 1 % Thermal Regulation 20 ms Pulse 0.002 0.02 %/W IADJ Adjustment Pin Current 45 100 μA ΔIADJ Adjustment Pin Current Change 10 mA ≤ IOUT ≤ 5A, 0.2 5 μA 3V ≤ (VIN − VOUT) ≤ 35V ΔVR/T Temperature Stability TMIN ≤ TJ ≤ TMAX 1 % ILOAD(Min) Minimum Load Current VIN − VOUT = 35V 3.5 10 mA ICL Current Limit VIN − VOUT ≤ 10V DC 5 8 A 0.5 ms Peak 7 12 A VIN − VOUT = 30V 1 A VN RMS Output Noise, % of VOUT 10 Hz ≤ f ≤ 10 kHz 0.003 % ΔVR/ΔVIN Ripple Rejection Ratio VOUT = 10V, f = 120 Hz, CADJ = 0 μF 60 dB VOUT = 10V, f = 120 Hz, CADJ = 10 μF 60 75 dB Long-Term Stability TJ = 125°C, 1000 hrs 0.3 1 % θJC Thermal Resistance NDS Package 1 °C/W Junction to Case NDE Package 4 °C/W θJA Thermal Resistance, Junction to NDS Package 35 °C/W Ambient (No Heat Sink) NDE Package 50 °C/W (1) Regulation is measured at a constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specifications for thermal regulation. Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM138 LM338 |
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