LM2598T-ADJ datasheet(8/33 Pages) NSC

部件名	LM2598T-ADJ

功能描述	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features

Download	33 Pages

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制造商	NSC [National Semiconductor (TI)]

网页	http://www.national.com

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Typical Performance Characteristics (Circuit of Figure 1)

Continuous Mode Switching Waveforms

V

IN = 20V, VOUT =5V, ILOAD =1A

L = 68 µH, C

OUT = 120 µF, COUT ESR = 100 mΩ

DS012593-18

A: Output Pin Voltage, 10V/div.

B: Inductor Current 0.5A/div.

C: Output Ripple Voltage, 50 mV/div.

Horizontal Time Base: 2 µs/div.

Discontinuous Mode Switching Waveforms

V

IN = 20V, VOUT =5V, ILOAD = 600 mA

L = 22 µH, C

OUT = 220 µF, COUT ESR=50 mΩ

DS012593-19

A: Output Pin Voltage, 10V/div.

B: Inductor Current 0.5A/div.

C: Output Ripple Voltage, 50 mV/div.

Horizontal Time Base: 2 µs/div.

Load Transient Response for Continuous Mode

V

IN = 20V, VOUT =5V, ILOAD = 250 mA to 750 mA

L = 68 µH, C

OUT = 120 µF, COUT ESR = 100 mΩ

DS012593-20

A: Output Voltage, 100 mV/div. (AC)

B: 250 mA to 750 mA Load Pulse

Horizontal Time Base: 100 µs/div.

Load Transient Response for Discontinuous Mode

V

IN = 20V, VOUT =5V, ILOAD = 250 mA to 750 mA

L = 22 µH, C

OUT = 220 µF, COUT ESR=50 mΩ

DS012593-21

A: Output Voltage, 100 mV/div. (AC)

B: 250 mA to 750 mA Load Pulse

Horizontal Time Base: 200 µs/div.

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