LT1371CR Linear Technology, LT1371CR Datasheet
LT1371CR
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LT1371CR Summary of contents
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... Nonlinear error amplifier transconductance re- duces output overshoot on start-up or overload recovery. Oscillator frequency shifting protects external compo- nents during overload conditions. , LTC and LT are registered trademarks of Linear Technology Corporation. † V OUT 12V R1 53 ...
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... Reference Voltage Line Regulation Operating Ambient Temperature Range ...... Operating Junction Temperature Range Commercial .......................................... 125 C Industrial ......................................... – 125 C Short Circuit ......................................... 150 C Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART NUMBER LT1371CR LT1371HVCR FB 2 LT1371IR NFB 3 LT1371HVIR GND 4 GND 5 GND 6 GND 7 ...
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ELECTRICAL C HARA TERISTICS 5V 0.6V S/S, SHDN, SYNC and NFB pins open, unless otherwise noted REF SW SYMBOL PARAMETER V Negative Feedback Reference Voltage NFB ...
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LT1371 W U TYPICAL PERFORMANCE CHARACTERISTICS Switch Saturation Voltage vs Switch Current 1.0 150 C 0.9 100 0.8 0.7 0.6 0.5 –55 C 0.4 0.3 0.2 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 ...
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W U TYPICAL PERFORMANCE CHARACTERISTICS V Pin Threshold and High C Clamp Voltage vs Temperature 2.4 2.2 V HIGH CLAMP 2.0 C 1.8 1.6 1.4 1.2 V THRESHOLD C 1.0 0.8 0.6 0.4 100 125 150 –50 – ...
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LT1371 W BLOCK DIAGRAM SHUTDOWN SHDN DELAY AND RESET S/S* SYNC SYNC + NFBA 100k – NFB 50k – 1.245V REF GND SENSE U OPERATION The LT1371 is a current mode switcher. This means that switch duty ...
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U U APPLICATIO S I FOR ATIO Unique error amplifier circuitry allows the LT1371 to directly regulate negative output voltages. The negative feedback amplifier’s 100k source resistor is brought out for negative output voltage sensing. The NFB pin regulates at ...
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LT1371 U U APPLICATIO S I FOR ATIO Shutdown and Synchronization The 7-pin R and T7 package devices have a dual function S/S pin which is used for both shutdown and synchroni- zation. The SW package device has both a ...
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U U APPLICATIO S I FOR ATIO saturate abruptly and other core materials fall in be- tween. The following formula assumes continuous mode operation but it errs only slightly on the high side for discontinuous mode can be ...
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LT1371 U U APPLICATIO S I FOR ATIO Output Capacitor Ripple Current (RMS (RMS – DC RIPPLE OUT V OUT = I V OUT DC = Switch Duty Cycle Input Capacitors The input capacitor of ...
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U U APPLICATIO S I FOR ATIO maximum output load current and will also be increased if poor quality (high ESR) output capacitors are used. The addition of a 0.0047 F capacitor on the V switching frequency ripple to only ...
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LT1371 U U APPLICATIO S I FOR ATIO T7 Package Layout Considerations Electrical connection to the tab package is required for proper device operation. If the tab is tied directly to the ground plane (Figure 4) no ...
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U TYPICAL APPLICATIONS Positive-to-Negative Converter with Direct Feedback V IN 2.7V TO 13V + 100 F P6KE-15A 1N4148 S/S SW OFF LT1371 MBRS330T3 NFB V GND C C2 *COILTRONICS CTX10-4 0.047 ...
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LT1371 U TYPICAL APPLICATIONS 150 MUR405 15V 2 150 MUR405 12V TO 25V + LT1371 ...
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... DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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. ...
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... TYP 0.095 – 0.115 (2.413 – 2.921) 0.013 – 0.023 (0.330 – 0.584) 0.155 – 0.195 (3.937 – 4.953) T7 (TO-220) (FORMED) 0695 = 40V IN LT/GP 0996 5K REV A • PRINTED IN THE USA LINEAR TECHNOLOGY CORPORATION 1995 ...