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| U T C LM317L LINEAR INTEGRATED CIRCUIT LOW CURRENT 1.25V TO 37V ADJUSTABLE VOLTAGE REGULATOR DESCRIPTION The UTC LM317L is a monolithic integrated circuit, designed for use as positive adjustable voltage regulator. It is designed to supply until 100mA of load current with an output voltage adjustable over a 1.25V to 37V range. 1 SOP-8 FEATURES *Output voltage range: 1.25V to 37V *Output current in excess of 100mA *Line regulation typ. 0.01% *Load regulation typ. 0.1% *Thermal overload protection *Short circuit protection *Output transistor safe area compensation *Floating operation for high voltage applications TO-92 PIN CONFIGURATIONS VIN 1 2 3 1 8 NC VOUT VOUT 2 7 VOUT ADJUST OUT IN 3 4 UTC LM317L 6 VOUT ADJ TO-92 Plastic Package Bottom View 5 NC SOP-8 PACKAGE ABSOLUTE MAXIMUM RATING PARAMETER Input-Output Differential Voltage Power Dissipation Operating Junction Temperature Range Storage Temperature Range SYMBOL Vi-Vo Pd Topr Tstr VALUE 40 Internally Limited 0~125 -55 ~ 150 UNIT V C C UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R101-008,A U T C LM317L LINEAR INTEGRATED CIRCUIT SCHEMATIC DIAGRAM INPUT R1 R2 R3 R4 Q10 Q1 Q2 R6 Q4 R7 Q8 R8 Q13 Q15 Q17 Q9 Q6 Q7 D1 R14 Q3 Q5 R10 R11 R12 R9 R13 R26 OUTPUT ADJUST R25 Q11 Q12 C2 R15 R24 C1 Q21 R20 Q14 Q16 Q19 R21 C3 R22 D3 R19 Q25 Q18 Q20 R16 R17 R18 R23 R5 Q22 D2 Q26 TEST CIRCUIT Vi 3 LM317L 1 2 R1 Vo Vref Cin 0.1F Iadj R2 Cout 1F UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R101-008,A U T C LM317L LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Vi-Vo=5V, Io=40mA, 0<=Tj<=125C, unless otherwise specified) PARAMETER Line Regulation SYMBOL Vo TEST CONDITIONS Vi-Vo=3~40V IL<20mA Vo<=5V Io=5~100mA Vo>=5V Io=5~100mA Tj=25C MIN TYP 0.01 0.02 5 20 0.1 0.3 50 0.2 MAX 0. 04 0.07 25 70 0.5 1.5 100 5 1.3 UNIT %/V %/V mV mV % % A A V % mA mA % dB dB Load Regulation Vo Tj=25C Tj=25C Adjustment Pin Current Adjustment Pin Current Reference Voltage Output Voltage Temperature Stability Minimum Load Current Maximum Output Current Output Noise Voltage (Percentance of Vo) Supply Voltage Rejection(*) IADJ IADJ VREF Vo/Vo Io(min) Io(max) eN SVR Vi-Vo=3~40V Io=5~100mA, Pd< 625 mW Vi-Vo=3~40V Io=5~100 mA , Pd< 625 mW Vi-Vo=40V Vi-Vo=3~13V Vi-Vo=40V B=10Hz~10KHz Tj=25C Tj=25C CADJ=0 f=120Hz CADJ=10F 1.2 1.25 0.7 3.5 200 50 0.003 65 5 100 66 80 (*) CADJ is connected between Adjust pin and Ground. I0 (mA) CURRENT LIMIT Tj=25XC I0 (mA) MINIMUM OPERATING CURRENT Tj=25XC 300 3.0 2.5 200 2.0 1.5 100 1.0 0.5 0 10 20 30 VIN-VOUT(V) 0 10 20 30 VIN-VOUT(V) UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R101-008,A U T C LM317L LINEAR INTEGRATED CIRCUIT APPLICATION INFORMATION The UTC LM317L provides an internal reference voltage of 1.25V between the output and adjustments terminals. This is used to set a constant current flow across an external resistor divider, giving an output voltage VO of: VO=VREF (1+R2/R1) + IADJ R2 The device is designed to minimize the term IADJ (100A max) and to maintain it very constant with line and load changes. Usually, the error term IADJ. R2 can be neglected. To obtain the previous requirement, all the regulator quiescent current is returned to the output terminal, imposing a minimum load current condition. If the load is insufficient, the output voltage will rise. The UTC LM317L is a floating regulator, input-output differential voltage, supplies of very high voltage with respect to ground can be regulated as long as the maximum input-output differential is not exceeded. Furthermore, programmable regulators are easily obtainable and, by connecting a fixed resistor between the adjustment and output, the device can be used as a precision current regulator. BASIC ADJUSTABLE REGULATOR Vi 3 LM317L 1 Vref 2 Vo R1 I1 Iadj R2 UTC UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R101-008,A U T C LM317L LINEAR INTEGRATED CIRCUIT VOLTAGE REGULATOR WITH PROTECTION DIODES 1N4001 D1 Vi 3 2 240 D2 R1 C3 1F 5K R2 C2 10F Vo LM317L 1 C1 ADJ 1N4001 0.1F SLOW TURN-ON 15V REGULATOR Vi 3 LM317L 1 C2 0.1F R2 2.7K 2 R1 240 R3 50K 2N2907 C1 25F Io= Vref R1 Vo=15V D1 1N4001 Vi 3 CURRENT REGULATOR Vo LM317L 1 2 R1 Io IADJ + IADJ 1.25V R1 5V ELECTRONIC SHUT-DOWN REGULATOR Vi 7V to 35V C1 0.1F R2 720 3 LM317L 1 2 R1 240 Vo=5V C2 0.1F Vi DIGITALLY SELECTED OUTPUTS 3 LM317L 1 2 Vo R1 240 2N2219 TTL R2 INPUT DIGITAL INPUTS(R2 sets maximun Vo) UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R101-008,A |
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