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LT1236AIS8-10 Datasheet(PDF) 9 Page - Linear Technology |
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LT1236AIS8-10 Datasheet(HTML) 9 Page - Linear Technology |
9 / 12 page 9 LT1236 TYPICAL APPLICATIONS Boosted Output Current with No Current Limit LT1236 OUT V+ ≥ (VOUT + 1.8V) GND IN LT1236 TA05 + 2N2905 10V AT 100mA 2 µF SOLID TANT R1 220 Ω Boosted Output Current with Current Limit LT1236 OUT GND IN LT1236 TA06 + 2N2905 10V AT 100mA 2 µF SOLID TANT D1* LED V+ ≥ VOUT + 2.8V 8.2 Ω R1 220 Ω GLOWS IN CURRENT LIMIT, DO NOT OMIT * LT1236 TA17 LT1236-10 GND +10V 15V VOUT VIN LT1236-10 GND –10V –15V VOUT VIN COM ILOAD R1 –15V R1 = –10V ILOAD + 1.5mA ±10V Output Reference LT1236-10 OUT GND IN LT1236 TA07 RL 30mA 15V R1* 169 Ω VOUT 10V TYPICAL LOAD CURRENT = 30mA SELECT R1 TO DELIVER TYPICAL LOAD CURRENT. LT1236 WILL THEN SOURCE OR SINK AS NECESSARY TO MAINTAIN PROPER OUTPUT. DO NOT REMOVE LOAD AS OUTPUT WILL BE DRIVEN UNREGULATED HIGH. LINE REGULATION IS DEGRADED IN THIS APPLICATION * Operating 5V Reference from 5V Supply Handling Higher Load Currents LT1236-5 OUT IN GND LT1236 TA15 + + 1N914 1N914 ≈8.5V C2* 5 µF C1* 5 µF 5V REFERENCE 5V LOGIC SUPPLY CMOS LOGIC GATE** fIN ≥ 2kHz* FOR HIGHER FREQUENCIES C1 AND C2 MAY BE DECREASED PARALLEL GATES FOR HIGHER REFERENCE CURRENT LOADING * ** LT1236-10 TRIM GND OUT LT1236 TA14 – + 1.2k R2 40.2 Ω 1% R1 4.99k 1% REF CMOS DAC LTC7543 IOUT FB 30pF LT1007C R4* 100 Ω FULL-SCALE ADJUST R3 4.02K 1% 10V F.S. –15V TC LESS THAN 200ppm/ °C NO ZERO ADJUST REQUIRED WITH LT1007 (V0S ≤ 60µV) * ** CMOS DAC with Low Drift Full-Scale Trimming** Trimming 10V Units to 10.24V LT1236-10 OUT IN TRIM GND 4.32k VOUT = 10.24V VIN 5k V – = –15V* *MUST BE WELL REGULATED dVOUT dV – = 15mV V LT1236 TA11 |
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