LT1185C Linear Technology, LT1185C Datasheet
LT1185C
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LT1185C Summary of contents
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... The LT1185 has all the protection features of previous LTC regulators, including power limiting and thermal shut- down. The 4-lead TO-3 package is specified for – 150 C operation and the 5-lead TO-220 is specified over 125 C. , LTC and LT are registered trademarks of Linear Technology Corporation. + 1.6 R1 1.4 2 ...
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... Control Section LT1185C ............................................. 125 C LT1185I .......................................... – 125 C LT1185M ........................................ – 150 C Power Transistor Section LT1185C ............................................. 150 C LT1185I .......................................... – 150 C LT1185M ........................................ – 175 C Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................ 300 C *See Application Section for details on calculating Operation Junction Temperature ...
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... LIM 0. 0.05 LIM LIM 2 0.005 0.014 0.003 0. for the LT1185C, – for LT1185I, and –55 C for JMAX is the maximum specified dropout voltage; . OUT . LIM – 1.5V 5V 3.5V OUT IN OUT OUT UNITS A• mA/A mA/A ...
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LT1185 W U TYPICAL PERFOR A Internal Current Limit 5 4 GUARANTEED LIMIT 3 TYPICAL 2 GUARANTEED 1 LIMIT TEST POINTS INPUT-OUTPUT DIFFERENTIAL (V) LT1185 • TPC01 Ground Pin Current 160 T ...
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U U APPLICATIO S I FOR ATIO Block Diagram A simplified block diagram of the LT1185 is shown in Figure 1. A 2.37V bandgap reference is used to bias the input of the error amplifier A1, and the reference amplifier ...
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LT1185 U U APPLICATIO S I FOR ATIO Amplifier A2 is used to generate an internal current through Q4 when an external resistor is connected from the REF pin to ground. This current is equal to 2.37V divided by R ...
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U U APPLICATIO S I FOR ATIO Large output capacitors (electrolytic or solid tantalum) will not cause the LT1185 to oscillate, but they will cause a damped “ringing” at light load currents where the ESR of the capacitor is several ...
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LT1185 U U APPLICATIO S I FOR ATIO factor is that local ambient temperature may be somewhat higher because of the point source of heat. The conse- quences of excess junction temperature include poor reliability, especially for plastic packages, and ...
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U U APPLICATIO S I FOR ATIO + V IN – *R1 SHOULD BE CONNECTED DIRECTLY TO GROUND LEAD, NOT TO THE LOAD, SO THAT r ERRORS CREATED BY r INCREASES WITH INCREASING GROUND PIN CURRENT. R2 SHOULD BE CONNECTED ...
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LT1185 U U APPLICATIO S I FOR ATIO + 2.4k – Logic, Positive Regulated Output † LIM 4k REF GND + FB LT1185 R2 V OUT *CMOS LOGIC ...
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U U APPLICATIO S I FOR ATIO Thermal Regulation IC regulators have a regulation term not found in discrete designs because the power transistor is thermally coupled to the reference. This creates a shift in the output voltage which is ...
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LT1185 TYPICAL APPLICATIO 15k + 2 F 2N3906 V IN TANT GND REF – V LT1185 IN V OUT LT1185 • TA03a Auxiliary + 12V Low Dropout Regulator for Switching Supply PRIMARY *DIODE CONNECTION INDICATES A FLYBACK ...
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TYPICAL APPLICATIO S Low Input Voltage Monitor Tracks Dropout Characteristics + + 2.2 F 360k TANT V IN REF R4** 1k R5* 0.01 – R6** 1k OPTIONAL HYSTERSIS 3 + LT1006 2 – Time Delayed ...
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LT1185 W SCHE ATIC DIAGRA 14 W ...
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... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of circuits as described herein will not infringe on existing patent rights. U Dimensions in inches (millimeters) unless otherwise noted. ...
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... A Supply Current, 2.5V Reference Output 400mV Dropout Voltage Supply Current 45 A Supply Current, Adjustable Current Limit For High Performance Microprocessors 1N4001 ADD FOR INDUCTIVE LOADS + C1 4 OUT TANT C3 0.05 F – = 5V, OUT 1185fd LT/GP 0499 2K REV D • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1994 ...