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Datasheet Linear Technology LT3742

ManufacturerLinear Technology

Dual, 2-Phase Step-Down Switching Controller


  • Download » Datasheet, PDF, 319 Kb, Revision: A
    LT3742 - Dual, 2-Phase Step-Down Switching Controller
    Docket ↓
    Dual, 2-Phase Step-Down
    Switching Controller
    Features n n n n n n n n Description Wide Input Voltage Range: 4V to 30V
    Wide Output Voltage Range: 0.8V to VIN
    Low Shutdown IQ: 20µA
    Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
    0.8V ±1.5% Voltage Reference
    500kHz Current Mode Fixed Frequency Operation
    Internal Boost Converter Provides Bias Rail for
    N-channel MOSFET Gate Drive
    Power Good Voltage Monitor for Each Output
    Programmable Soft-Start
    24-Lead 4mm × 4mm × 0.75mm Package The LT®3742 is a dual step-down DC/DC switching regulator
    controller that drives high side N-channel power MOSFETs.
    A 500kHz fixed frequency current mode architecture provides fast transient response with simple loop compensation components and cycle-by-cycle current limiting. The
    output stages of the two controllers operate 180° out of
    phase to reduce the input ripple current, minimizing the
    noise induced on the input supply, and allowing less input
    An internal boost regulator generates a bias rail of VIN + 7V
    to provide gate drive for the N-channel MOSFETs allowing
    low dropout and 100% duty cycle operation. The LT3742 ...



Package4x4 QFN-244x4 QFN-24
Package CodeUFUF


ArchitectureConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC927ADC927A
Design ToolsLTspice File,LTpowerCAD ModelLTspice File,LTpowerCAD Model
Export Control, yes/nonono
FeaturesAnti-Phase Switching, Tracking, Power Good, 100% Duty CycleAnti-Phase Switching, Tracking, Power Good, 100% Duty Cycle
Frequency, kHz500500
Integrated Inductor, yes/nonono
Ishutdown, µA2020
Isupply, mA55
Max Phases22
Monolithic, yes/nonono
Number of Outputs22
Operating Temperature Range, °C0 to 850 to 85
Output Current, A55
Output Current 2, A55
Polyphase, yes/noyesyes
Sense ResistorRsenseRsense
Switch Current, A55
Switch Current 2, A55
Synchronous, yes/nonono
Topology 1BuckBuck
Topology 2BuckBuck
Vin Max, V3030
Vin Min, V44
Vout Max, V3030
Vout MaximumVinVin
Vout Min, V0.80.8
Vout Min 2, V.8.8
Vref Accuracy Over Temp, %1.51.5

Eco Plan


Moldel Line

Series: LT3742 (2)

Manufacturer's Classification

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

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