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Datasheet Linear Technology LT1939

Manufacturer:Linear Technology
Series:LT1939

Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller

Datasheets

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    LT1939 - Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
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    LT1939
    Monolithic 2A Step-Down
    Regulator Plus Linear
    Regulator/Controller
    DESCRIPTION FEATURES Wide Input Range: 3V to 25V
    Short-Circuit Protected Over Full Input Range
    2A Output Current Capability
    Adjustable/Synchronizable Fixed Frequency
    Operation from 250kHz to 2.2MHz
    Soft-Start/Tracking Capability
    Output Adjustable Down to 0.8V
    Adjustable Linear Regulator/Driver with 13mA
    Output Capability
    Power Good Comparator with Complementary
    Outputs
    Low Shutdown Current: 12ОјA
    Thermally Enhanced 3mm Г— 3mm DFN Package APPLICATIONS The LTВ®1939 is a current mode PWM step-down DC/DC
    converter with an internal 2.3A switch. The wide input
    range of 3V to 25V makes the LT1939 suitable for regulating power from a wide variety of sources, including
    automotive batteries, industrial supplies and unregulated
    wall adapters.
    Resistor-programmable 250kHz to 2.2MHz frequency
    range and synchronization capability enable optimization ...

Eco Plan

 LT1939EDD#PBFLT1939EDD#TRPBFLT1939IDD#PBFLT1939IDD#TRPBF
RoHSCompliantCompliantCompliantCompliant

Parametrics

 LT1939EDD#PBFLT1939EDD#TRPBFLT1939IDD#PBFLT1939IDD#TRPBF
ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC1293ADC1293ADC1293ADC1293A
Design ToolsLTspice File,LTpowerCAD ModelLTspice File,LTpowerCAD ModelLTspice File,LTpowerCAD ModelLTspice File,LTpowerCAD Model
Export Control, yes/nonononono
FeaturesLDO, Tracking, Resistor Set Frequency, External Synchronization, Power GoodLDO, Tracking, Resistor Set Frequency, External Synchronization, Power GoodLDO, Tracking, Resistor Set Frequency, External Synchronization, Power GoodLDO, Tracking, Resistor Set Frequency, External Synchronization, Power Good
Frequency, kHz2200220022002200
Frequency Adjust Range250kHz to 2.2MHz250kHz to 2.2MHz250kHz to 2.2MHz250kHz to 2.2MHz
Frequency Sync Range250kHz to 2.2MHz250kHz to 2.2MHz250kHz to 2.2MHz250kHz to 2.2MHz
Integrated Inductor, yes/nonononono
Ishutdown, ВµA12121212
Isupply, mA2.52.52.52.5
Max Phases1111
Monolithic, yes/noyesyesyesyes
Number of Outputs2222
Operating Temperature Range, °C0 to 850 to 85-40 to 85-40 to 85
Output Current, A2222
Output Current 2, A1111
Polyphase, yes/nonononono
Switch Current, A2.82.82.82.8
Synchronous, yes/nonononono
TopologyBuck, LDOBuck, LDOBuck, LDOBuck, LDO
Topology 1BuckBuckBuckBuck
Topology 2LDOLDOLDOLDO
Vin Max, V25252525
Vin Min, V3333
Vout Max, V24.2524.2524.2524.25
Vout Max 2, V24.224.224.224.2
Vout Maximum.97Vin.97Vin.97Vin.97Vin
Vout Min, V0.80.80.80.8
Vout Min 2, V0.80.80.80.8

Packaging

 LT1939EDD#PBFLT1939EDD#TRPBFLT1939IDD#PBFLT1939IDD#TRPBF
Package3x3 DFN-123x3 DFN-123x3 DFN-123x3 DFN-12
Package CodeDDDDDDDD

Manufacturer's Classification

Switching Regulator

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