LTC3539 LINER [Linear Technology], LTC3539 Datasheet

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... Additional features include a low shutdown current of under 1μA and thermal overload protection. The LTC3539/LTC3539-2 are offered in a 2mm × 3mm × 0.75mm DFN package. L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. ...

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... TAPE AND REEL LTC3539EDCB#PBF LTC3539EDCB#TRPBF LTC3539EDCB-2#PBF LTC3539EDCB-2#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: ELECTRICAL CHARACTERISTICS temperature range of – ...

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... Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3539E/LTC3539E-2 is guaranteed to meet performance specifi cations from 0°C to 85°C. Specifi cations over –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: Specifi ...

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... LTC3539/LTC3539-2 TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Load Current and 1.8V IN OUT 100 90 80 EFFICIENCY 0 LOAD CURRENT (mA) Effi ciency vs Load Current and OUT 100 90 80 EFFICIENCY POWER LOSS 2. 3. 4.2V ...

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... 3.3V AT 400mA OUT C = 22μF OUT 100 V OUT 50mV/DIV AC-COUPLED LOAD CURRENT 200mA/DIV 3539 G14 500μs/DIV LTC3539/LTC3539 Temperature FB 0.50 0.25 0 –0.25 –0.50 –0.75 –1. –60 –40 – TEMPERATURE (°C) 3539 G08 Burst Mode SW and I ...

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... LTC3539/LTC3539-2 PIN FUNCTIONS SW (Pin 1): Switch Pin. Connect inductor between SW and V . Keep PCB trace lengths as short and wide as pos- IN sible to reduce EMI. If the inductor current falls to zero, or SHDN is low, an internal anti-ring resistor is connected from minimize EMI. IN PGND (Pin 2), GND (Pin 3): Signal and Power Ground. ...

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... N-chan- DS(ON) nel MOSFET switch and P-channel MOSFET synchronous rectifi er, the LTC3539 achieves high effi ciency over a wide range of load current. Burst Mode operation maintains high effi ciency at very light loads, reducing the quiescent current to just 10μA. ...

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... In Burst Mode operation, energy is deliv- ered to the output until it reaches the nominal regulation value, then the LTC3539 transitions to Sleep mode where the outputs are off and the LTC3539 consumes only 10μA of quiescent current from V droops slightly, switching resumes. This maximizes ef- fi ...

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... The minimum inductance value is given by MIN L > > V operation IN OUT Where for the LTC3539 or 2.2 for the LTC3539-2 Ripple = allowable inductor current ripple (Amps peak-to-peak) V IN(MIN) V OUT(MAX) The inductor current ripple is typically set for 20% to 40% of the maximum inductor current. High frequency ferrite core inductor materials improve effi ...

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... WE-PD Type XS www.we-online.com Output and Input Capacitor Selection The internal loop compensation of the LTC3539 is designed to be stable with output capacitor values of 10μF or greater. Although ceramic capacitors are recommended, low ESR (equivalent series resistance) tantalum capacitors may be used as well. ...

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... ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE LTC3539/LTC3539-2 0.40 ± 0.10 TYP 5 8 1.35 ±0.10 1.65 ± ...

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... LTC3539/LTC3539-2 RELATED PARTS PART NUMBER DESCRIPTION LTC3400/ 600mA I , 1.2MHz, Synchronous Step-Up DC/DC SW LTC3400B Converters LTC3401 3MHz, Synchronous Step-Up DC/DC Converter 97% Effi ciency V SW LTC3402 3MHz, Synchronous Step-Up DC/DC Converter 97% Effi ciency V SW LTC3421 3MHz, Synchronous Step-Up DC/DC Converter SW with Output Disconnect LTC3422 1 ...