LT1680IN#PBF Linear Technology, LT1680IN#PBF Datasheet
LT1680IN#PBF
Specifications of LT1680IN#PBF
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LT1680IN#PBF Summary of contents
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... The LT1680 operating frequency is programmable and can be synchronized up to 200kHz. Minimum off-time operation provides switch protection. The IC also incorpo- rates a soft start feature that is gated by both shutdown and undervoltage lockout conditions. , LTC and LT are registered trademarks of Linear Technology Corporation. 12V IN 10V TO 15V R ...
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LT1680 ABSOLUTE AXI U RATI GS (Note 1) Power Supply Voltage (12V ) .................. – 0.3V to 20V IN Sense Amplifier Input Common Mode ...... – 0.3V to 60V GATE Pin Voltage ....................... – 0.3V to 12V ...
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ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T 12V = 12V 2V 1.25V REF SYMBOL PARAMETER Error Amplifier V ...
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LT1680 W U TYPICAL PERFOR A CE CHARACTERISTICS I Supply Current 12VIN vs Temperature – 125 –50 100 TEMPERATURE ( C) 1680 G01 5V Short-Circuit Current REF ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS Error Amplifier Source Current vs Temperature 350 325 300 275 250 225 200 –50 – 100 125 TEMPERATURE ( C) 1680 G10 RUN/SHDN Threshold Hysteresis vs Temperature 26 25 ...
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LT1680 W U TYPICAL PERFOR A CE CHARACTERISTICS RUN/SHDN Input Current vs Pin Voltage 600 FULL OPERATING TEMPERATURE RANGE UPPER 450 LIMIT TYPICAL 300 LOWER LIMIT 150 RUN/SHDN PIN VOLTAGE (V) 1680 ...
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CTIO S RUN/SHDN (Pin 11): Precision Referenced Shutdown. Can be used as logic level input for shutdown control analog monitor for input supply undervoltage protection, etc enabled when RUN/SHDN pin ...
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LT1680 U OPERATIO Basic Control Loop The LT1680 uses a constant frequency, current mode architecture. The timing of the IC is provided through an internal oscillator circuit that can be synchronized to an external clock and is programmable to operate ...
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U OPERATIO Slope Compensation For duty cycles greater than 50%, slope compensation is required to prevent current mode duty cycle instability in the regulator control loop. The LT1680 employs internal slope compensation that is adequate for most applica ...
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LT1680 U U APPLICATIO S I FOR ATIO 200 C = 0.68nF CT 180 C = 1nF CT 160 C = 1.5nF CT 140 C = 2.2nF CT 120 100 ...
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U U APPLICATIO S I FOR ATIO clamped to 2.5V through a 20k series input resistance and will therefore draw 0.5mA when tied directly to 12V. This additional current can be minimized by making the con- nection through an external ...
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LT1680 U U APPLICATIO S I FOR ATIO OSCILLATOR PERIOD 0 TIME 5a Figure 5. Inductor Current at DC > 50% and Slope Compensation Adjusted Signal greater than ...
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U U APPLICATIO S I FOR ATIO imposes an exponential increase in the slope compensa- tion waveform, further increasing the effective compen- sation slope up to 20% for a given setting. Design example 20V 80V ...
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LT1680 U U APPLICATIO S I FOR ATIO output currents and diode current ratings must be ob- served with caution. The peak diode current is I/2 D(PEAK) AVG and the average power dissipation ( ...
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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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... SENSE DC/DC Controller LT1738 Ultralow Noise DC/DC Boost Controller LTC3401/LTC3402 1A/2A 3MHz Micropower Synchronous Boost Converter trademark of Linear Technology Corporation. SENSE Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com – 48V to 5V 30W Forward Converter ...