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Datasheet Linear Technology LT1944-1

Manufacturer:Linear Technology
Series:LT1944-1

Dual Micropower Step-Up DC/DC Converter

Datasheets

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    LT1944-1 - Dual Micropower Step-up DC/DC Converter
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    LT1944-1
    Dual Micropower Step-Up
    DC/DC Converter U FEATURES
    ■ ■



    ■ DESCRIPTIO The LT®1944-1 is a dual micropower step-up DC/DC
    converter in a 10-pin MSOP package. One converter is
    designed with a 100mA current limit and a 400ns off-time;
    the other with a 175mA current limit and a 1.5µs off-time.
    The 1.5µs off-time converter is ideal for generating an
    output voltage that is close to the input voltage (i.e. a LiIon to 5V converter, or a two-cell to 3.3V converter). With
    an input voltage range of 1.2V to 15V, the LT1944-1 is ideal
    for a wide variety of applications. Both converters feature
    a quiescent current of only 20µA at no load, which further
    reduces to 0.5µA in shutdown. A current limited, fixed offtime control scheme conserves operating current, resulting in high efficiency over a broad range of load current.
    Tiny, low profile inductors and capacitors can be used to
    minimize footprint and cost in space-conscious portable
    applications. Low Quiescent Current:
    20µA in Active Mode
    <1µA in Shutdown Mode
    Operates with VIN as Low as 1.2V ...

Eco Plan

 LT1944-1EMS#PBFLT1944-1EMS#TRPBF
RoHSCompliantCompliant

Parametrics

 LT1944-1EMS#PBFLT1944-1EMS#TRPBF
ArchitectureConstant Off-Time Current ModeConstant Off-Time Current Mode
Demo BoardsDC445ADC445A
Design ToolsLTspice ModelLTspice Model
Export Control, yes/nonono
Frequency Adjust RangeConstant Off TimeConstant Off Time
Integrated Inductor, yes/nonono
Ishutdown, µA11
Isupply, mA0.020.02
Monolithic, yes/noyesyes
Number of Outputs22
Operating Temperature Range, °C0 to 850 to 85
Polyphase, yes/nonono
Switch Current, A0.1750.175
Switch Current 2, A0.10.1
Synchronous, yes/nonono
TopologyBoost, Sepic, FlybackBoost, Sepic, Flyback
Topology 1BoostBoost
Topology 2BoostBoost
Vin Max, V1515
Vin Min, V1.21.2
Vin Min Startup, V1.21.2
Vout Max, V3636
Vout Max 2, V4040
Vout Min, V1.231.23
Vswitch Max, V3636

Packaging

 LT1944-1EMS#PBFLT1944-1EMS#TRPBF
PackageMS-10MS-10
Package CodeMSMS

Manufacturer's Classification

Switching Regulator

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