LT1431 Linear Technology Corporation, LT1431 Datasheet
LT1431
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LT1431 Summary of contents
Page 1
... On-chip divider resistors allow the LT1431 to be configured shunt regulator, with 1% initial voltage tolerance and requiring no additional external components. By adding two external resistors, the output voltage may be set to any value between 2 ...
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... ABSOLUTE AXI U RATI ....................................................... 36V COLLECTOR .......................................... 6V COMP TOP MID REF GND-F to GND-S .................................................... 0.7V Ambient Temperature Range LT1431M (OBSOLETE) ................... – 55°C to 125°C LT1431I ............................................ – 40°C to 85°C LT1431C .............................................. 0°C TO 70°C U PACKAGE/ORDER I FOR ATIO TOP VIEW COLLECTOR 1 8 REF COMP MID + V ...
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... TEMPERATURE (°C) LT1431 • TPC04 Note 3: The LT1431 has bias current cancellation which is effective only for V ≥ 3V. A slight (≈2mV) shift in reference voltage occurs when KA V drops below 3V. For this reason, these tests are not performed ...
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... COLL 1.0 0.5 0 100k – –25 0 TEMPERATURE (°C) LT1431 • TPC11 0.1Hz to 10Hz Noise 10k 100k TIME (MINUTES) LT1431 • G14 180 135 –45 –90 –135 –180 1M 10M LT1431 • TPC09 COLL 75 100 125 LT1431 • TPC12 LT1431 • ...
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... Therefore, the absolute maximum DC voltage on these pins is 6V, well beyond the normal operating condi- tions. As with all bipolar ICs, the LT1431 contains parasitic diodes which must not be forward biased or else anoma- lous behavior will result. Pin conditions to be avoided are ...
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... U U APPLICATIO S I FOR ATIO Frequency Compensation As a shunt regulator, the LT1431 is stable for all capacitive loads on the COLL pin. Capacitive loading between 0.01µF and 18µF causes reduced phase margin with some ringing under transient conditions. Output capacitors should not be used arbitrarily because output noise is not necessarily reduced ...
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... G 1.5k 1N4148 1 COLL REF LT1431 TOP MID GND-S GND *1.5" #23 SOLID COPPER WIRE ~0.002Ω → 3A LIMIT LT1431 47Ω MJE2955 5V + 330µF LT1431 • TA07 0.002Ω* 5V, 2. – 47µF 4 LT1006 7 LT1006 5 6 LT1431 • TA08 1413fc 7 ...
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... I (A) LOAD LT1431 • TA10 Fully Loaded Output Ripple vs Filtering C* LT1172 + 30mV 210µF P 6mV P-P 100µF 100µF *L BELL INDUSTRIES J.W. MILLER DIVISION 9310-36 10µH, 450mA 3 13. REF 2.7k 6 LT1431 • TA11 LT1072 40mV P-P 8mV P-P LT1431 • TA12 1413fc ...
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... C3, C4, C5: WIMA MKS-2 C6: NICHICON UPL1C471MPH6 D1, D2: PHILIPS BAT85 D3: MOTOROLA MBR330 L1: COILTRONICS CTX50-3- 0.12Ω 470µF MBR330 50µH 3A ESR + 16V 5V 2.5A R6* 23. COMP COLL REF LT1431CN8 TOP MID R7* GND-S GND-F 24. 1431 TA15 LT1431 5 6 LT1431 • TA14 1413fc 9 ...
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... C3 6pF R15 R17 Q20 5k 1. 1pF Q18 Q19 R20 5k R16 11Ω Q21 2.5X R14 R18 11Ω 50k GND-FORCE LT1431 • SD01 .405 (10.287) .005 .200 MAX (5.080) (0.127) MIN MAX .025 (0.635) (5.588 – 7.874) RAD TYP .125 3 ...
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... MIN .189 – .197 (4.801 – 5.004) NOTE .150 – .157 (3.810 – 3.988) NOTE .004 – .010 (0.101 – 0.254) .050 (1.270) BSC SO8 0303 LT1431 1002 1413fc 11 ...
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... LT1431 PACKAGE DESCRIPTIO .180 ± .005 .060 ± .005 (4.572 ± 0.127) (1.524± 0.127) DIA .180 ± .005 (4.572 ± 0.127) .500 .050 (12.70) (1.270) MIN MAX .016 ± .003 (0.406 ± 0.076) .050 (1.27) BSC .060 ± .010 (1.524 ± 0.254) ...