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Linear Technology LTC3850IGN-2#PBF

Производитель:Linear Technology
Серия:LTC3850-2
Модель:LTC3850IGN-2#PBF

Dual, 2-Phase Synchronous Step-Down Switching Controller

Datasheets

  • Скачать » Datasheet, PDF, 417 Кб
    Выписка из документа ↓
    FEATURES n LTC3850-2 Dual, 2-Phase Synchronous Step-Down Switching Controller DESCRIPTION
    The LTC®3850-2 is a high performance dual synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages. A constant-frequency current mode architecture allows a phase-lockable frequency of up to 780kHz. Power loss and supply noise are minimized by operating the two controller output stages out of phase. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3850-2 features a precision 0.8V reference and a power good output indicator. A wide 4V to 30V input supply range encompasses most battery chemistries and intermediate bus voltages. Independent TK/SS pins for each controller ramp the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The MODE/PLLIN pin selects among Burst Mode® operation, pulse-skipping mode, or continuous inductor current mode and allows the IC to be synchronized to an external clock. The LTC3850-2 is identical to the LTC3850-1, except they have different pin assignments. Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise High Efficiency: Up to 95% RSENSE or DCR Current Sensing ±1% 0.8V Output Voltage Accuracy Phase-Lockable Fixed Frequency 250kHz to 780kHz Supports Pre-Biased Output Dual N-Channel MOSFET Synchronous Drive Wide VIN Range: 4V to 30V Operation Adjustable Soft-Start Current Ramping or Tracking Foldback Output Current Limiting Output Overvoltage Protection Power Good Output Voltage Monitor 28-Pin Narrow SSOP Package APPLICATIONS Notebook and Palmtop Computers Portable Instruments Battery-Operated Digital Devices DC Power Distribution Systems L, LT, LTC, LTM, OPTI-LOOP and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258. TYPICAL APPLICATION
    High Efficiency Dual 3.3V/2.5V Step-Down Converter
    4.7F VIN PGOOD INTVCC 0.1F 2.2H TG1 TG2 0.1F 2.2H 2.2k EFFICIENCY (%) 22F 50V VIN 7V TO 26V 100 VIN = 12V 95 VOUT = 3.3V 90 85 80 75 70 65 60 0.1F VOUT2 2.5V 5A 100F 6V
    38502 TA01 Efficiency
    10000 EFFICIENCY POWER LOSS (mW) BOOST1 BOOST2 SW1 SW2 LTC3850-2 BG2 BG1 500kHz MODE/PLLIN EXTVCC 0.1F SENSE1+ RUN1 SENSE1­ VFB1 ITH1 220pF TK/SS1 0.1F SGND 20k 15k PGND FREQ/PLLFLTR SENSE2+ RUN2 SENSE2­ VFB2 ITH2 TK/SS2 0.1F 10nF 10k 220pF 15k 20k ...

Цены

    Dual, 2-Phase Synchronous Step-Down Switching Controller
    Цена LTC3850IGN-2#PBF
    ПоставщикПроизводительНаименованиеЦена
    ЭлитанLinear TechnologyLTC3850IGN-2300 руб.
    5 элементLinear TechnologyLTC3850IGN-2#PBF319 руб.
    КремнийLinear TechnologyLTC3850IGN-2 PBFпо запросу
    МосЧипLTC3850IGN-2-TRPBFпо запросу
    ТаймЧипсLinear TechnologyLTC3850IGN-2#PBFпо запросу
    Все 7 предложений от 7 поставщиков »

Классификация производителя

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Poly-Phase Buck Controllers

Варианты написания: LTC3850IGN-2PBF, LTC3850IGN-2 PBF, LTC3850IGN2#PBF, LTC3850IGN 2#PBF

Выписка из документа:
FEATURES n LTC3850-2 Dual, 2-Phase Synchronous Step-Down Switching Controller DESCRIPTION
The LTC®3850-2 is a high performance dual synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages. A constant-frequency current mode architecture allows a phase-lockable frequency of up to 780kHz. Power loss and supply noise are minimized by operating the two controller output stages out of phase. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3850-2 features a precision 0.8V reference and a power good output indicator. A wide 4V to 30V input su...

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