LTC3728LEGN

LTC3728LEGN, switching regulator controller, 550 kHz, 0.3 V, 50 mA, 3 A, SOP

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Price:: US $1.00~1.00 / piece [Get Latest Price]

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PartNumber:: LTC3728LEGN

Brand:: Linear Technology - Linear | Pack: SOP | D/C: 07+

Availability:: Supply Ability: 4/Day Can Ship Immediately
Delivery: 10-15 Business Days (ships out within 3 Business days)

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Products Upload time: 2013-06-18

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Part Number:LTC3728LEGN
US $1.00 - 1.00
Quantity:

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Product Summary

The LTC3728LEGN is a dual high performance step-down switching regulator controller. The LTC3728LEGN drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase. The applications of the LTC3728LEGN include Notebook and Palmtop Computers, Telecom Systems, Portable Instruments, Battery-Operated Digital Devices, DC Power Distribution Systems.

Parametrics

LTC3728LEGN absolute maximum ratings: (1)Input Supply Voltage (VIN): 36V to –0.3V; (2)Top Side Driver Voltages (BOOST1, BOOST2): 42V to –0.3V; (3)Switch Voltage (SW1, SW2): 36V to –5V; (4)INTVCC, EXTVCC, RUN/SS1, RUN/SS2, (BOOST1-SW1), (BOOST2-SW2), PGOOD: 7V to –0.3V; (5)SENSE1+, SENSE2 +, SENSE1–, SENSE2– Voltages: (1.1)INTVCC to –0.3V; (6)PLLIN, PLLFLTR, FCB, Voltage: INTVCC to –0.3V; (7)ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages: 2.7V to –0.3V; (8)Peak Output Current ＜10μs (TG1, TG2, BG1, BG2): 3A; (9)INTVCC Peak Output Current: 50mA; (10)Operating Temperature Range (Note 7): –40 to 85℃.

Features

LTC3728LEGN features: (1)Dual, 180°Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise; (2)OPTI-LOOPR Compensation Minimizes COUT; (3)±1% Output Voltage Accuracy; (4)Power Good Output Voltage Indicator; (5)Phase-Lockable Fixed Frequency 250kHz to 550kHz; (6)Dual N-Channel MOSFET Synchronous Drive; (7)Wide VIN Range: 3.5V to 36V Operation; (8)Very Low Dropout Operation: 99% Duty Cycle; (9)Adjustable Soft-Start Current Ramping; (10)Foldback Output Current Limiting; (11)Latched Short-Circuit Shutdown with Defeat Option; (12)Output Overvoltage Protection; (13)Remote Output Voltage Sense; (14)Low Shutdown IQ: 20μA; (15)5V and 3.3V Regulators; (16)3 Selectable Operating Modes: Constant Frequency, Burst ModeR Operation and PWM; (17)Available in 32-Pin 5mm x 5mm QFN and 28-Pin SSOP Packages.