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Datasheet Linear Technology LT1619

ManufacturerLinear Technology
SeriesLT1619

Low Voltage Current Mode PWM Controller

Datasheets

  • Download » Datasheet, PDF, 268 Kb, Revision: A, File uploaded 09-03-2017
    LT1619 - Low Voltage Current Mode PWM Controller
    Docket ↓
    LT1619
    Low Voltage Current Mode
    PWM Controller
    U FEATURES



    ■ ■ ■ ■
    ■ ■

    ■ DESCRIPTIO The LT ®1619 is a fixed frequency PWM controller for
    implementing current mode DC/DC converters with minimum external parts. The LT1619 operates with input
    voltages ranging from 1.9V to 18V and is suitable for a
    variety of battery-powered and distributed DC/DC converters. The internal rail-to-rail N-channel MOSFET driver
    operates either from the input in the nonbootstrapped
    mode or from the output in bootstrapped operation. The
    driver is designed to drive a low side power transistor in
    boost, SEPIC, flyback and other topologies. Wide VIN Range: 1.9V to 18V
    300kHz Fixed Frequency Current Mode Control
    1A Rail-to-Rail N-Channel MOSFET Driver
    Low 53mV Current Limit Threshold Voltage
    Improves Efficiency
    Implements Boost, SEPIC and Flyback Converters ...

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Packaging

Parametrics

LT1619EMS8#PBFLT1619EMS8#TRPBFLT1619ES8#PBFLT1619ES8#TRPBF
ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Design ToolsLTspice FileLTspice FileLTspice FileLTspice File
Export Controlnononono
FeaturesExternal Synchronization, Burst ModeExternal Synchronization, Burst ModeExternal Synchronization, Burst ModeExternal Synchronization, Burst Mode
Frequency, kHz550550550550
Frequency Sync Range300kHz - 500kHz300kHz - 500kHz300kHz - 500kHz300kHz - 500kHz
Integrated Inductornononono
Ishutdown, A15151515
Isupply, mA9999
Max Phases1111
Monolithicnononono
Number of Outputs1111
Operating Temperature Range, °C0 to 850 to 850 to 850 to 85
Polyphasenononono
Sense ResistorRsenseRsenseRsenseRsense
Switch Current, A20202020
Synchronousnononono
TopologyBoost, Sepic, FlybackBoost, Sepic, FlybackBoost, Sepic, FlybackBoost, Sepic, Flyback
Vin Max, V18181818
Vin Min, V1.91.91.91.9
Vin Min Startup, V1.91.91.91.9
Vout Max, V18181818
Vout Maximum3, 5, 12 and higher3, 5, 12 and higher3, 5, 12 and higher3, 5, 12 and higher
Vout Min, V1.241.241.241.24
Vswitch Max, V20202020

Eco Plan

LT1619EMS8#PBFLT1619EMS8#TRPBFLT1619ES8#PBFLT1619ES8#TRPBF
RoHSCompliantCompliantCompliantCompliant

Design Notes

  • Download » Design Notes - DN255, PDF, 78 Kb, 04-02-2001
    LT1619: Tiny Boost Controller Provides Efficient Solutions for Low Voltage Inputs
    Docket ↓
    advertisement Tiny Boost Controller Provides Efficient Solutions
    for Low Voltage Inputs – Design Note 255
    Keith Szolusha The LT1619 provides a complete solution for low input
    voltage applications that require low side MOSFET drive.
    It is a 300kHz, current mode PWM controller capable
    of operating from inputs ranging from 1.9V to 18V. The
    rail-to-rail, 1A MOSFET driver is capable of driving an
    external MOSFET gate to within 350mV of the supply
    rail and to within 100mV of ground. Bootstrapping the
    driver supply pin (DRV) to the output enables the power
    supply to operate from input voltages as low as 1.9V yet
    still drive the MOSFET gate voltage high enough for full
    enhancement. The 53mV low side current limit threshold R2
    12.4k R1
    37.4k 1
    2
    3 220pF 75k 4 S/S VIN FB DRV
    LT1619 VC
    GND GATE
    SENSE 15nF 8
    7
    6
    5 + ...

Articles

  • Download » Articles - LT Journal, PDF, 180 Kb, 09-01-2000
    LT1619 Boost Controller Provides Efficient Solutions for Low Voltage Inputs
    Docket ↓
    DESIGN FEATURES LT1619 Boost Controller Provides
    Efficient Solutions for
    by Bing Fong Ma and
    Low Voltage Inputs Kurk Mathews Introduction
    As logic voltages continue to fall, it is
    increasingly common to find a high
    current, low voltage (3.3V or less)
    supply satisfying a large portion of a
    circuit’s power requirement. While
    this, in itself, is not a problem, generating subsequent voltages at even
    moderate currents from such a low
    voltage source can be challenging.
    Selecting a topology such as the boost,
    SEPIC or flyback converter is the easy
    part. Unfortunately, finding a switching regulator controller or MOSFET
    that works well at low voltages has
    been difficult until now.
    The new LT1619 provides a complete solution for low voltage and other
    applications requiring low-side MOS
    power transistors. The LT1619 is a
    300kHz (externally synchronizable to
    frequencies as high as 500kHz) current mode PWM controller capable of
    operating from inputs ranging from ...

Moldel Line

Series: LT1619 (4)

Manufacturer's Classification

  • Power Management > Switching Regulator > SEPIC Regulators
  • Power Management > Switching Regulator > Step-Up (Boost) Regulators > External Power Switch Boost

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