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LM2854 Datasheet(PDF) 8 Page - Texas Instruments

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No. de pieza LM2854
Descripción Electrónicos  4A 500 kHz / 1 MHz Synchronous SIMPLE SWITCHER짰 Buck Regulator
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM2854 Datasheet(HTML) 8 Page - Texas Instruments

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LOAD CURRENT (A)
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VIN = 5.0V
VIN = 4.0V
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LOAD CURRENT (A)
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VIN = 5.0V
VIN = 3.3V
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VIN = 3.3V
VIN = 5.0V
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LOAD CURRENT (A)
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VIN = 3.3V
VIN = 5.0V
LM2854
SNVS560B – MARCH 2008 – REVISED NOVEMBER 2008
www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified, the following conditions apply: VIN = PVIN = AVIN = EN = 5.0V, CIN is 47 µF 10V X5R ceramic
capacitor, LO is from TDK SPM6530T family; TAMBIENT = 25°C for efficiency curves, bode plots and waveforms, and TJ = 25°C
for all others.
LM2854 500 kHz Efficiency vs.
LM2854 500 kHz Efficiency vs.
IOUT VOUT = 2.5V, LO = 2.2 µH, 16 mΩ DCR
IOUT VOUT = 1.2V, LO = 1.5 µH, 9.7 mΩ DCR
Figure 20.
Figure 21.
LM2854 500 kHz Efficiency vs.
LM2854 500 kHz Efficiency vs.
IOUT VOUT = 3.3V, LO = 1.5 µH, 9.7 mΩ DCR
IOUT VOUT = 1.8V, LO = 1.5 µH, 9.7 mΩ DCR
Figure 22.
Figure 23.
LM2854 1 MHz Bode Plot
LM2854 500 kHz Bode Plot
VIN = 3.3V, VOUT = 1.8V, IOUT = 4A
VIN = 3.3V, VOUT = 1.8V, IOUT = 4A
RFB1 = 150 kΩ, RCOMP = 1 kΩ, CCOMP = 100 pF,
RFB1 = 250 kΩ, RCOMP = 1 kΩ, CCOMP = 47 pF,
LOUT = 0.82 µH, COUT = 100 µF ceramic
LOUT = 1.5 µH, COUT = 100 µF ceramic
Figure 24.
Figure 25.
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