U T C LM317L LINEAR INTEGRATED CIRCUIT LOW CURRENT 1.25V TO 37V ADJUSTABLE VOLTAGE REGULATOR DESCRIPTION SOP-8 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 1 to 37V range. FEATURES TO-92 *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 PIN CONFIGURATIONS 1 2 VIN 1 VOUT 2 8 NC 7 VOUT 6 VOUT 5 NC 3 ADJUST VOUT 3 ADJ 4 UTC LM317L IN OUT TO-92 Plastic Package Bottom View SOP-8 PACKAGE ABSOLUTE MAXIMUM RATING PARAMETER Input-Output Differential Voltage Power Dissipation Operating Junction Temperature Range Storage Temperature Range UTC SYMBOL VALUE UNIT Vi-Vo Pd Topr Tstr 40 Internally Limited 0~125 -55 ~ 150 V °C °C UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R101-008,A U T C LM317L LINEAR INTEGRATED CIRCUIT SCHEMATIC DIAGRAM INPUT R1 R2 R3 R4 Q22 R5 D2 Q10 Q1 R19 Q25 Q14 Q2 R6 Q4 Q8 R7 Q18 Q13 Q16 R18 R23 Q26 Q19 R21 Q17 Q9 R17 Q20 Q15 R8 R16 C3 R22 D3 Q21 C1 R20 Q6 Q7 C2 Q11 Q12 R15 R24 D1 R14 Q3 R25 Q5 R10 R11 R12 R26 R13 R9 OUTPUT ADJUST TEST CIRCUIT Vi 3 Vo 2 LM317L 1 Vref R1 Cin 0.1µF Cout 1µF Iadj R2 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<=125°C, unless otherwise specified) PARAMETER SYMBOL TYP MAX UNIT Line Regulation ∆Vo Vi-Vo=3~40V IL<20mA Tj=25°C 0.01 0. 04 %/V Load Regulation ∆Vo Vo<=5V Io=5~100mA Tj=25°C 0.02 5 0.07 25 %/V mV Tj=25°C 20 0.1 70 0.5 mV % 0.3 50 0.2 1.5 100 5 % µA µA 1.2 1.25 1.3 V 5 100 0.7 3.5 200 50 0.003 % mA mA TEST CONDITIONS Vo>=5V Io=5~100mA Adjustment Pin Current Adjustment Pin Current IADJ ∆IADJ Reference Voltage VREF Output Voltage Temperature Stability Minimum Load Current Maximum Output Current ∆Vo/Vo Io(min) Io(max) Output Noise Voltage (Percentance of Vo) Supply Voltage Rejection(*) eN MIN Vi-Vo=3~40V Io=5~100mA, Pd< 625 mW Vi-Vo=3~40V Io=5~100 mA , Pd< 625 mW SVR Vi-Vo=40V Vi-Vo=3~13V Vi-Vo=40V B=10Hz~10KHz Tj=25°C Tj=25°C CADJ=0 f=120Hz CADJ=10µF 66 % 65 dB 80 dB (*) CADJ is connected between Adjust pin and Ground. I0 (mA) CURRENT LIMIT I0 (mA) Tj=25¢XC MINIMUM OPERATING CURRENT Tj=25¢XC 3.0 300 2.5 2.0 200 1.5 100 1.0 0.5 0 UTC 10 20 30 VIN-VOUT (V) 0 10 20 30 VIN-VOUT (V) 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 (100µA 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 Vo 2 1 Vref 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 1 240Ω ADJ C1 Vo 2 LM317L D2 R1 1N4001 0.1µF C3 1µF C2 5KΩ R2 10µF SLOW TURN-ON 15V REGULATOR Vi 3 Vo Vo=15V 2 LM317L CURRENT REGULATOR D1 R1 1 240Ω C2 Vi 3 LM317L R1 2 1N4001 1 IADJ R3 0.1µF Io 50KΩ R2 2.7KΩ 2N2907 C1 Io= 25µF 3 LM317L 7V to 35V Vo=5V 2 R1 240Ω 1 R1 + IADJ≅ 1.25V R1 DIGITALLY SELECTED OUTPUTS 5V ELECTRONIC SHUT-DOWN REGULATOR Vi Vref Vi C2 3 LM317L 2 Vo R1 240Ω 1 0.1µF C1 0.1µF R2 720Ω 2N2219 TTL R2 INPUT DIGITAL INPUTS(R2 sets maximun Vo) UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R101-008,A