Product Summary

The LTC1871EMS#PBF is a wide input range, current mode, boost, flyback and SEPIC controller that drives an N-channel power MOSFET. The LTC1871EMS#PBF requires very few external components. Intended for low to medium power applications, it eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maximizing efficiency. The applications of the LTC1871EMS#PBF include Telecom Power Supplies, Portable Electronic Equipment.

Parametrics

LTC1871EMS#PBF absolute maximum ratings: (1)VIN Voltage : – 0.3V to 36V; (2)INTVCC Voltage: – 0.3V to 7V; (3)INTVCC Output Current: 50mA; (4)GATE Voltage: – 0.3V to VINTVCC + 0.3V; (5)ITH, FB Voltages: – 0.3V to 2.7V; (6)RUN, MODE/SYNC Voltages: – 0.3V to 7V; (7)FREQ Voltage: – 0.3V to 1.5V; (8)SENSE Pin Voltage: – 0.3V to 36V; (9)Operating Temperature Range (Note 2): – 40℃ to 85℃; (10)Junction Temperature (Note 3): 125℃; (11)Storage Temperature Range: – 65℃ to 150℃; (12)Lead Temperature (Soldering, 10 sec): 300℃.

Features

LTC1871EMS#PBF features: (1)High Efficiency (No Sense Resistor Required); (2)Wide Input Voltage Range: 2.5V to 36V; (3)Current Mode Control Provides Excellent Transient Response; (4)High Maximum Duty Cycle (92% Typ); (5)±2% RUN Pin Threshold with 100mV Hysteresis; (6)±1% Internal Voltage Reference; (7)Micropower Shutdown: IQ = 10μA; (8)Programmable Operating Frequency (50kHz to 1MHz) with One External Resistor; (9)Synchronizable to an External Clock Up to 1.3 × fOSC; (10)User-Controlled Pulse Skip or Burst Mode Operation; (11)Internal 5.2V Low Dropout Voltage Regulator; (12)Output Overvoltage Protection; (13)Capable of Operating with a Sense Resistor for High Output Voltage Applications; (14)Small 10-Lead MSOP Package.

Diagrams

LTC1871EMS#PBF block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LTC1871EMS#PBF
LTC1871EMS#PBF

IC REG CTRLR BST FLYBK CM 10MSOP
Data Sheet
0-1: $3.24
1-25: $2.15
25-100: $1.62
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LTC1040
LTC1040
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Data Sheet
Negotiable 
LTC1040CN
LTC1040CN

IC COMPARATOR LOW PWR DUAL 18DIP
Data Sheet
0-3240: $1.32
LTC1040CN#PBF
LTC1040CN#PBF

IC COMPARATOR LOW PWR DUAL 18DIP
Data Sheet
0-1: $2.33
1-25: $1.55
25-100: $1.32
LTC1040CSW
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Data Sheet
0-2720: $1.71
LTC1040CSW#PBF
LTC1040CSW#PBF

IC COMPARATOR LOW PWR DUAL18SOIC
Data Sheet
0-280: $1.71
LTC1040CSW#TR
LTC1040CSW#TR

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Data Sheet
0-3000: $1.74