IL1085 IC of adjustable voltage regulator of positive polarity with low residual voltage and load current 3 А IC IL1084 is a powerful adjustable voltage regulator of positive polarity with low residual voltage and load current 3,2 А. IC of powerful adjustable voltage regulator with low residual voltage lower than 1,5A and reference voltage 1,25 V is purposed for producing constant temperature-stabilized voltage of positive polarity by means of the value set by external resistive divider and used in electronic equipment as a source of stabilized supply. TO-220 1 2 3 Вывод 1. Регулировка 2. Выход 3. Вход Properties: • Reference voltage 1,25V • Output current up to 3,2 A • Input-output voltage difference, UIN - UO up to 30 V • Residual voltage lower than 1,5 V • Overload protection • Embedded temperature protection • Operation range of chip temperature from 0 up to +125°С. Table 1 – Description of regulator IC pins in 3-pin package ТО-220 Pin No. Description Name 01 Adjustment Adjust 02 Output Output 03 Input Input 1 IL1085 D1 UIN Input Output IL1085 03 01 Adjust Cin UO 02 R1 IAdj Co R2 С1, С2 – smoothing capacitors, C1=10 mkF, С2=100 mkF (Ta), D1 - IC R1, R2 - resistors, R1=121 Ом ± 1%, R2 – adjusted with accuracy 1%. Output voltage Uo, V, is defined by formula:: U O = U ref (1 + R2 ) + I Adj R 2 , R1 Where U ref - reference voltage, V, I Adj - adjustment current, mkA. Since IADJ has values not more than 120 mkA, inaccuracy dependent on this value for Uo – is minor.. Figure 1 – Connection circuit of adjustable voltage regulator TABLE 2 − ТABLE OF ELECTRICAL CHARACTERISTICS 2 IL1085 Characteristic, measurement unit Reference voltage, V Change of output voltage when input voltage changes, % Symbol Uref Regline IO=10мA (UIN - UO)=3В 10мА ≤ IO ≤ I FULL LOAD 1,5В ≤(UIN - UO) ≤ 25В IO=10 мА, 1,5В ≤(UIN - UO) ≤ 15В IO=10 мА, Change of output voltage when load current changes, % Residual voltage, V Measurement mode Regload 15В ≤(UIN - UO) ≤ 30В (UIN - UO) = 3В 10мА ≤ IO ≤ I FULL LOAD Maximum output current, A Uds Minimum output current, mA Thermostabilization, %/W Pulsation smoothing ratio, dB Adjustment current, mkA Change of adjustment current, mkA Ratio of output voltage temporary instability, % Characteristic, measurement unit ∆Uref = 1 %, IO= I FULL LOAD (UIN - UO) = 5В (UIN - UO) = 25В (UIN - UO) = 25В IO min Regterm tимпульс=30мсTА=25OC RR f=120Гц, СAdj=25мкФ, СО=25 мкФ (тантал), IO=I FULL LOAD, (UIN - UO)=3В IAdj 10мА ≤ IO ≤ I FULL LOAD 1,5В ≤(UIN - UO) ≤ 25В 10мА ≤ IO ≤ I FULL LOAD ∆IAdj 1,5В ≤(UIN - UO) ≤ 25В S 1000 ч ;TJ = 125 OC (при испытаниях) IO max Standard Temperature TJ, OC min Max 1,238 1,262 25±10 1,225 1,270 0÷125 - 0,2 0÷125 - 0,5 0÷125 - 0,3 25±10 - 0,4 1,5 0÷125 0÷125 3,2 0,2 - 0÷125 0÷125 0÷125 60 10 0,020 - - 120 0÷125 - 5 0÷125 - 1 25±10 0÷125 Notes: 1 Measurement of electrical characteristics is carried out when capacitance СIN=10 mkF is connected to the input and СО=100 mkF – to the output; 2 Reference voltage Uref in adjustable regulator is measured between outputs Output and Adjust on resistance R1 (figure 1); 3 Parameters stipulated in table 1 are ensured for constant chip temperature TJ. Measurement of parameters should be performed using heatsink and pulse technique; 4 I FULL LOAD – value of maximum output current dependent on input-output voltage difference (UIN - UO) with power dissipation in package КТ-28 - 30 W. Table 3 − Typical values of electrical characteristics 3 IL1085 Characteristic, Measurement unit Symbol . Adjustment current, mkA Temperature ratio of output voltage instability, % Noise voltage on output, (% ) IAdj TS Un rms Measurement mode Typical value TJ = 25 OC TJ = 0÷125 OC 55 0,5 TJ = 25 OC 10 Гц ≤ f ≤10 кГц 0,003 Table 4 − Table of maximum and absolute maximum ratings Parameter Input-output voltage difference, UIN - UO Chip temperature, ТJ Storage temperature, Тstg Measurement unit V C O C O 4 Maximum ratings Absolute maximum ratings min max min max 2,77 0 30 125 0 -65 -65 31 150 150