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LM2678S-3.3 Folha de dados(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Nome de Peças LM2678S-3.3
Descrição Electrónicos  SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
Download  23 Pages
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2678S-3.3 Folha de dados(HTML) 8 Page - National Semiconductor (TI)

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Typical Performance Characteristics
Continuous Mode Switching Waveforms
V
IN = 20V, VOUT =5V, ILOAD =5A
L = 10 µH, C
OUT = 400 µF, COUTESR=13 mΩ
DS100886-17
A: VSW Pin Voltage, 10 V/div.
B: Inductor Current, 2 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Horizontal Time Base: 1 µs/div
Discontinuous Mode Switching Waveforms
V
IN = 20V, VOUT =5V, ILOAD = 500 mA
L = 10 µH, C
OUT = 400 µF, COUTESR=13 mΩ
DS100886-18
A: VSW Pin Voltage, 10 V/div.
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Horizontal Time Base: 1 µs//iv
Load Transient Response for Continuous Mode
V
IN = 20V, VOUT =5V
L = 10 µH, C
OUT = 400 µF, COUTESR=13 mΩ
DS100886-19
A: Output Voltage, 100 mV//div, AC-Coupled.
B: Load Current: 500 mA to 5A Load Pulse
Horizontal Time Base: 100 µs/div
Load Transient Response for Discontinuous Mode
V
IN = 20V, VOUT =5V,
L = 10 µH, C
OUT = 400 µF, COUTESR=13 mΩ
DS100886-20
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 200 mA to 3A Load Pulse
Horizontal Time Base: 200 µs/div
www.national.com
8


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