某大学毕业设计（文献翻译）
第9页
图20带可调限流和输出电压的“实验室”电源
图21可调节电流限流器 图22 5.0V电子开关稳压器
图23慢接通稳压器 图24电流稳压器
来源于《三端可调节稳压器LM317》
某大学毕业设计（文献翻译）
附：英文原文
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1.5 A Adjustable Output, Positive Voltage Regulator
The LM317 is an adjustable 3–terminal positive voltage regulator capable of supplying in excess of 1.5 A over an output voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow–out proof.
The LM317 serves a wide variety of applications including local, on card regulation. This device can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317 can be used as a precision current regulator.
1.Output Current in Excess of 1.5 A. 2.Output Adjustable between 1.2 V and 37 V. 3.Internal Thermal Overload Protection.
4.Internal Short Circuit Current Limiting Constant with Temperature. 5.Output Transistor Safe–Area Compensation. 6.Floating Operation for High Voltage Applications.
7.Available in Surface Mount D2PAK, and Standard 3–Lead Transistor Package. 8.Eliminates Stocking many Fixed Voltages.
*Cin is required if regulator is located an appreciable distance from power supply filter.
某大学毕业设计（文献翻译）
**CO is not needed for stability, however, it does improve transient response.
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Since IAdj is controlled to less than 100 μA, the error associated with this term is negligible in most applications.
Pin 1. Adjust,2. Vout,3. Vin
ORDERING INFORMATION Device Operating Temperature Range LM317BD2T TJ = -40?C o +125?C LM317BT LM317D2T LM317T MAXIMUM RATINGS Rating Input–Output Voltage Differential Power Dissipation Case 221A TA = +25?C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Case 936 (D2PAK) TA = +25?C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Operating Junction Temperature Range Storage Temperature Range Symbol VI - VO PD θJA θJC Package Surface Mount Insertion Mount Surface Mount Insertion Mount TJ = 0?C to +125?C Value 40 Internally Limited 65 5.0 Internally Limited 70 5.0 -40 to +125 -65 to +150 Unit Vdc W ?C / W ?C / W W ?C / W ?C / W ?C ?C PD θJA θJC TJ Tstg ELECTRI?CAL CHARACTERISTICS (VI–VO = 5.0 V; IO = 0.5 A for D2T and T packages; TJ = Tlow to
某大学毕业设计（文献翻译）
Thigh [Note 1]; Imax and Pmax [Note 2]; unless otherwise noted.) Characteristics Line Regulation (Note 3)TA=+25 ?C， 3.0V≤VI - VO≤40V Load Regulation (Note 3)TA=+25 ?C， 10mA≤IO≤Imax,VO≤5.0V VO≥5.0V Thermal Regulation, TA = +25?C (Note 6), 20 ms Pulse Adjustment Pin Current Adjustment Pin Current Change， 2.5V≤VI - VO≤40V 10mA≤IL≤Imax,PD≤Pmax Reference Voltage,3.0V≤VI -VO≤40V 10mA≤IO≤Imax，PD≤Pmax Figure Symbol 1 2 Regline Regload Min - - - - - - Type Max 0.01 5.0 0.1 0.03 50 0.2 0.04 25 0.5 0.07 100 5.0 Unit %/V mV % VO % VO/W μA μA 第12页
3 1，2 Regthem IAdj △IAdj 3 Vref Regline Regload 1.2 - - - - - 1.5 0.15 - - 66 - - 1.25 0.02 20 0.3 0.7 3.5 2.2 0.4 1.3 0.07 70 1.5 - 10 - - V %V mV % VO % VO mA A Line Regulation (Note 3)，3.0V≤VI - 1 VO≤40V Load Regulation (Note 3)，10mA≤IO≤Imax 2 VO≤5.0V VO≥5.0V Temperature Stability（Tlow≤TJ≤Thigh） 3 Minimum Load Current to Maintain 3 Regulation（VI-VO=40V） Maximum Output Current 3 VI - VO≤15V，PD≤Pmax，T Package VI-VO=40V，PD≤Pmax，TA=+25?C， T Package RMS Noise, % of VO，TA=+25?C, 10Hz≤f≤10KHz Ts ILmin Imax N RR 0.003 - 65 80 0.3 5.0 - - 1.0 - % VO dB Ripple Rejection，VO=10V,f=120Hz 4 (Note4)Without CAdj CAdj=10μF Long–Term Stability，TJ= Thigh（Note5）, 3 TA=+25 ?C for Endpoint Measurements Thermal Resistance Junction to Case, T Package NOTES:
S RθJC %/1.0Kh ?C /W 1.TlowtoThigh=0?C to +125?C, for LM317T, D2T. Tlow to Thigh = –40?C to +125?C, for
LM317BT,BD2T.
2. Imax = 1.5 A, Pmax = 20 W.
