LM2671 datasheet(8/26 Pages) NSC

부품명	LM2671

상세설명	SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator with Features

PDF	26 Pages

Scroll/Zoom	100%

제조업체	NSC [National Semiconductor (TI)]

홈페이지	http://www.national.com

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8 / 26 page

Typical Performance Characteristics

(Circuit of Figure 2)

Continuous Mode Switching Waveforms

IN = 20V, VOUT = 5V, ILOAD = 500 mA

L = 100 µH, C

OUT = 100 µF, COUTESR = 0.1

Ω

Discontinuous Mode Switching Waveforms

IN = 20V, VOUT = 5V, ILOAD = 300 mA

L = 15 µH, C

OUT = 68 µF (2x), COUTESR=25 m

Ω

10004218

A: VSW Pin Voltage, 10 V/div.

B: Inductor Current, 0.2 A/div

C: Output Ripple Voltage, 50 mV/div AC-Coupled

Horizontal Time Base: 1 µs/div

10004219

A: VSW Pin Voltage, 10 V/div.

B: Inductor Current, 0.5 A/div

C: Output Ripple Voltage, 20 mV/div AC-Coupled

Horizontal Time Base: 1 µs/div

Load Transient Response for Continuous Mode

IN = 20V, VOUT =5V

L = 100 µH, C

OUT = 100 µF, COUTESR = 0.1

Ω

Load Transient Response for Discontinuous Mode

IN = 20V, VOUT = 5V,

L = 47 µH, C

OUT = 68 µF, COUTESR=50 m

Ω

10004220

A: Output Voltage, 100 mV/div, AC-Coupled

B: Load Current: 100 mA to 500 mA Load Pulse

Horizontal Time Base: 50 µs/div

10004221

A: Output Voltage, 100 mV/div, AC-Coupled

B: Load Current: 100 mA to 400 mA Load Pulse

Horizontal Time Base: 200 µs/div

LM2671 데이터시트(PDF) 8 Page - National Semiconductor (TI)