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IL1085 IC of adjustable voltage regulator of positive polarity with low residual voltage and load current 3
IC IL1084 is a powerful adjustable voltage regulator of positive polarity with low residual voltage and load current 3,2 . 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. 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.
TO-220
1 2 3
1. 2. 3.
Table 1 - Description of regulator IC pins in 3-pin package -220 Pin No. Description Name 01 Adjustment Adjust 02 Output Output 03 Input Input
1
IL1085
D1 Input Output 02 R1 IAdj Co UO
UIN
03
IL1085
01 Adjust
Cin
R2
1, 2 - smoothing capacitors, C1=10 mkF, 2=100 mkF (Ta), D1 - IC R1, R2 - resistors, R1=121 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 - ABLE OF ELECTRICAL CHARACTERISTICS
2
IL1085
Characteristic, measurement unit Symbol Measurement mode Standard Temperature TJ, OC 2510 0/125 0/125
min Reference voltage, V Uref IO=10A (UIN - UO)=3 10 IO I FULL LOAD 1,5 (UIN - UO) 25 IO=10 , 1,5 (UIN - UO) 15 IO=10 , Regload 15 (UIN - UO) 30 (UIN - UO) = 3 10 IO I FULL LOAD Uref = 1 %, IO= I FULL LOAD 1,238 1,225 -
Max 1,262 1,270 0,2
Change of output voltage when input voltage changes, % Change of output voltage when load current changes, % Residual voltage, V Maximum output current, A
Regline
3,2 0,2 60 -
0,5 0,3 0,4 1,5 10 0,020 120 5 1
0/125
2510 0/125 0/125 0/125 0/125 0/125 0/125 0/125 0/125 2510
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 IO max
(UIN - UO) = 5 (UIN - UO) = 25 (UIN - UO) = 25 IO min Regterm t=30T=25OC RR f=120, Adj=25, =25 (), IO=I FULL LOAD, (UIN - UO)=3 IAdj 10 IO I FULL LOAD 1,5 (UIN - UO) 25 10 IO I FULL LOAD IAdj 1,5 (UIN - UO) 25 S 1000 ;TJ = 125 OC ( )
Notes: 1 Measurement of electrical characteristics is carried out when capacitance IN=10 mkF is connected to the input and =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 -28 - 30 W.
Table 3 - Typical values of electrical characteristics
3
IL1085
Characteristic, Measurement unit Adjustment current, mkA Temperature ratio of output voltage instability, % Noise voltage on output, (% ) Symbol . IAdj TS Un rms Measurement mode TJ = 25 OC TJ = 0/125 OC TJ = 25 OC 10 f 10 Typical value 55 0,5 0,003
Table 4 - Table of maximum and absolute maximum ratings
Measurement unit V C O C
O
Maximum ratings
Parameter
Absolute maximum ratings min 0 -65 -65 max 31 150 150
min Input-output voltage difference, UIN - UO Chip temperature, J Storage temperature, stg 2,77 0
max 30 125
4

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