LM2591HVS-5.0 datasheet(7/29 Pages) TI

部品番号	LM2591HVS-5.0

部品情報	LM2591HV SIMPLE SWITCHER Power onverter 150 kHz 1A Step-Down Voltage

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LM2591HV

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SNVS074D – MAY 2001 – REVISED APRIL 2013

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

(Circuit of Test Circuit and Layout Guidelines)

ON/OFF Pin Current (Sinking)

Internal Gain-Phase Characteristics

Figure 14.

Figure 15.

Continuous Mode Switching Waveforms

Discontinuous Mode Switching Waveforms

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

VIN = 20V, VOUT = 5V, ILOAD = 250 mA

L = 52

μH, COUT = 100 μF, COUT ESR = 100 mΩ

L = 15

μH, COUT = 150 μF, COUT ESR = 90 mΩ

A: Output Pin Voltage, 10V/div.

B: Inductor Current 0.5A/div.

B: Inductor Current 0.25A/div.

C: Output Ripple Voltage, 50 mV/div.

C: Output Ripple Voltage, 100 mV/div.

Figure 16. Horizontal Time Base: 2

μs/div.

Figure 17. Horizontal Time Base: 2

μs/div.

Load Transient Response for Continuous Mode

Load Transient Response for Discontinuous Mode

VIN = 20V, VOUT = 5V, ILOAD = 250 mA to 1A

L = 52

μH, COUT = 100 μF, COUT ESR = 100 mΩ

L = 15

μH, COUT = 150 μF, COUT ESR = 90 mΩ

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

B: 250 mA to 1A Load Pulse

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

B: 250 mA to 1A Load Pulse

Figure 18. Horizontal Time Base: 50

μs/div.

Figure 19. Horizontal Time Base: 200

μs/div.

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