lt1172ct-pbf Linear Technology Corporation, lt1172ct-pbf Datasheet
lt1172ct-pbf
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lt1172ct-pbf Summary of contents
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... An externally activated shutdown mode reduces total supply current typically for standby operation. , LTC and LT are registered trademarks of Linear Technology Corporation. SwitcherCAD is a trademark of Linear Technology Corporation. L2 OUTPUT ...
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... PACKAGE = 150 C/W JA ORDER PART NUMBER FRONT VIEW 5 V LT1170CT LT1170IT 3 GND 2 FB LT1170HVCT LT1170HVIT T PACKAGE LT1171CT LT1171IT T JMAX JC JA 100 C 2 C/W 75 C/W LT1171HVCT 100 C 4 C/W 75 C/W 100 C 8 C/W 75 C/W LT1171HVIT LT1172CT LT1172HVCT C I 117012ff ...
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U PACKAGE/ORDER I FOR ATIO TOP VIEW GND NC PACKAGE 8-LEAD CERDIP * Do not connect Pin 4 of the LT1172 DIP ...
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LT1 170/LT1 171/LT1172 ELECTRICAL CHARACTERISTICS perature range, otherwise specifications are at T SYMBOL PARAMETER Flyback Amplifier Source and Sink Current BV Output Switch Breakdown Voltage V Output Switch SAT “On” Resistance (Note 3) Control Voltage to Switch Current Transconductance I ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS Switch Current Limit vs Duty Cycle – 125 DIVIDE VERTICAL SCALE BY TWO FOR LT1171, BY FOUR FOR LT1172 ...
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LT1 170/LT1 171/LT1172 W U TYPICAL PERFOR A CE CHARACTERISTICS Shutdown Mode Supply Current 200 180 160 140 T = 150 C 120 J 100 80 60 – 125 ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS Transconductance of Error Amplifier 7000 6000 5000 4000 3000 2000 1000 0 –1000 1k 10k 100k FREQUENCY (Hz) W BLOCK DIAGRA V IN 2.3V REG 100kHz OSC MODE SELECT – FB ERROR AMP ...
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LT1 170/LT1 171/LT1172 U OPERATIO The LT1170/LT1171/LT1172 are current mode switchers. This means that switch duty cycle is directly controlled by switch current rather than by output voltage. Referring to the block diagram, the switch is turned “on” at the ...
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U OPERATIO Care should be taken for miniDIP applications to ensure that the worst case input voltage and load current condi- tions do not cause excessive die temperatures. The follow- ing formulas can be used as a rough guide to ...
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LT1 170/LT1 171/LT1172 U OPERATIO With 150kHz 1.5V, and R3 = 2k, offset voltage shift is 3.8mV. This is not particularly bother- some, but note that high offsets could ...
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U TYPICAL APPLICATIO OPTIONAL VN2222 SHUTDOWN D2 ER82.004 600mA SCHOTTKY. OTHER FAST SWITCHING TYPES MAY BE USED AND BATTERY MAY BE TIED TOGETHER. MAXIMUM VALUE FOR V IN BATTERY VOLTAGES, HIGHEST EFFICIENCY IS ...
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LT1 170/LT1 171/LT1172 U TYPICAL APPLICATIO S Negative-to-Positive Buck-Boost Converter C4* LT1170 100 F OPTIONAL INPUT FILTER GND –20V REQUIRED IF INPUT LEADS 2" * PULSE ENGINEERING 92114, COILTRONICS 50-2-52 ** † THIS CIRCUIT ...
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U TYPICAL APPLICATIO S † D3 1N4001 470 , LT1170 GND INPUT VOLTAGE > < 35V BAT D1 1N5819 2.2 F 200 F 35V 35V ...
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LT1 170/LT1 171/LT1172 U TYPICAL APPLICATIO 2 C5* 100 F + C4* 470 –15V * REQUIRED IF INPUT LEADS 2" 14 Positive Buck Converter * REQUIRED IF INPUT LEADS ...
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U TYPICAL APPLICATIO 20V TO 30V GND 330 F 35V C6 0.02 F MBR330p MODE LOGIC 220pF <0.3V = NORMAL MODE >2.5V = SHUTDOWN OPEN = BURST MODE Forward Converter ...
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LT1 170/LT1 171/LT1172 PACKAGE DESCRIPTIO CORNER LEADS OPTION .045 – .068 (1.143 – 1.650) FULL LEAD OPTION .300 BSC (7.62 BSC) .008 – .018 (0.203 – 0.457) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS .320 – ...
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PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .009 – .015 (0.229 – 0.381) +.035 .325 –.015 +0.889 8.255 –0.381 NOTE: INCHES 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL ...
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LT1 170/LT1 171/LT1172 PACKAGE DESCRIPTIO .010 – .020 45 (0.254 – 0.508) .008 – .010 0 – 8 TYP (0.203 – 0.254) .016 – .050 (0.406 – 1.270) NOTE: INCHES 1. DIMENSIONS IN (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. ...
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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 its circuits as described herein will not infringe on existing patent rights Package ...
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... Good for Boost, Flyback, Inverting, SEPIC Directly Regulates V OUT Low 1mA Quiescent Current Synchronizable 25V 1.25A Out from an SO-8 6W Output, 5% Regulation, No Optocoupler Needed 1.5A Switch, Good for 5V to 3.3V Push-Pull, <100 V Output Noise P-P LT/TP 1002 1K REV F • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1991 117012ff ...