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LM2657 Datasheet(PDF) 9 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM2657
Description  Dual Synchronous Buck Regulator Controller
PDF  26 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2657 Datasheet(HTML) 9 Page - National Semiconductor (TI)

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Typical Performance Characteristics The system efficiency plots below were measured using input
voltages of 15V, 20V, 24V, 28V. These input voltages correspond with the uppermost curve to lowermost curve, respectively.
The output current (I
O) refers to simultaneous loading of both channels.
System Efficiency for 5V/3.3V Outputs
System Efficiency for 2.5V/3.3V Outputs
20134705
20134706
System Efficiency for 1.8V/1.2V Outputs
System Max V
OUT For A Given VIN
T
J = 25˚C
20134707
20134703
Modulator (Plant) Gain
20134708
www.national.com
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