LM2596T-3.3 datasheet(8/42 Pages) TI1

部品番号	LM2596T-3.3

部品情報	LM2596 SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator

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LM2596

SNVS124C – NOVEMBER 1999 – REVISED APRIL 2013

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Typical Performance Characteristics (continued)

(Circuit of Figure 20)

Continuous Mode Switching Waveforms

Feedback Pin

VIN = 20V, VOUT = 5V, ILOAD = 2A

Bias Current

L = 32

μH, COUT = 220 μF, COUT ESR = 50 mΩ

A: Output Pin Voltage, 10V/div.

B: Inductor Current 1A/div.

C: Output Ripple Voltage, 50 mV/div.

Figure 15.

Figure 16. Horizontal Time Base: 2

μs/div.

Discontinuous Mode Switching Waveforms

Load Transient Response for Continuous Mode

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

VIN = 20V, VOUT = 5V, ILOAD = 500 mA to 2A

L = 10

μH, COUT = 330 μF, COUT ESR = 45 mΩ

L = 32

μH, COUT = 220 μF, COUT ESR = 50 mΩ

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

A: Output Pin Voltage, 10V/div.

B: 500 mA to 2A Load Pulse

B: Inductor Current 0.5A/div.

C: Output Ripple Voltage, 100 mV/div.

Figure 17. Horizontal Time Base: 2

μs/div.

Figure 18. Horizontal Time Base: 100

μs/div.

Load Transient Response for Discontinuous Mode

VIN = 20V, VOUT = 5V, ILOAD = 500 mA to 2A

L = 10

μH, COUT = 330 μF, COUT ESR = 45 mΩ

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

B: 500 mA to 2A Load Pulse

Figure 19. Horizontal Time Base: 200

μs/div.

8

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