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Datasheet Linear Technology LT1940L

Manufacturer:Linear Technology

Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator


  • Download » Datasheet, PDF, 288 Kb, Revision: A
    LT1940/LT1940L - Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator
    Docket ↓
    Dual Monolithic 1.4A,
    1.1MHz Step-Down
    Switching Regulator
    ■ ■ ■

    ■ ■
    ■ DESCRIPTIO The LT®1940 is a dual current mode PWM step-down
    DC/DC converter with internal 2A power switches. Both converters are synchronized to a single 1.1MHz oscillator and
    run with opposite phases, reducing input ripple current. The
    output voltages are set with external resistor dividers, and
    each regulator has independent shutdown and soft-start
    circuits. Each regulator generates a power-good signal
    when its output is in regulation, easing power supply sequencing and interfacing with microcontrollers and DSPs. Wide Input Voltage Range
    LT1940: 3.6V to 25V
    LT1940L: 3.6V to 7V
    Two 1.4A Output Switching Regulators with
    Internal Power Switches
    Constant 1.1MHz Switching Frequency
    Anti-Phase Switching Reduces Ripple
    Independent Shutdown/Soft-Start Pins ...



Package CodeFEFE


ArchitectureConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC519ADC519A
Design ToolsLTspice Model,LTpowerCAD ModelLTspice Model,LTpowerCAD Model
Export Control, yes/nonono
FeaturesAnti-Phase Switching, Power GoodAnti-Phase Switching, Power Good
Frequency, kHz11001100
Integrated Inductor, yes/nonono
Ishutdown, µA3030
Isupply, mA3.83.8
Max Phases22
Monolithic, yes/noyesyes
Number of Outputs22
Operating Temperature Range, °C0 to 850 to 85
Output Current, A1.41.4
Output Current 2, A1.41.4
Polyphase, yes/noyesyes
Switch Current, A2.42.4
Switch Current 2, A2.42.4
Synchronous, yes/nonono
Topology 1BuckBuck
Topology 2BuckBuck
Vin Max, V77
Vin Min, V3.63.6
Vout Max, V2222
Vout Maximum.88VIN.88VIN
Vout Min, V1.251.25
Vout Min 2, V1.251.25

Eco Plan


Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Internal Power Switch Buck

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