LM2599 datasheet(7/31 Pages) NSC

7 / 31 page

Typical Performance Characteristics (Circuit of Figure 1) (Continued)

Connection Diagrams and Order Information

Continuous Mode Switching Waveforms

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

L = 32 µH, C

OUT = 220 µF, COUT ESR = 50 mΩ

DS012582-20

A: Output Pin Voltage, 10V/div.

B: Inductor Current 1A/div.

C: Output Ripple Voltage, 50 mV/div.

Horizontal Time Base: 2 µs/div.

Discontinuous Mode Switching Waveforms

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

L = 10 µH, C

OUT = 330 µF, COUT ESR = 45 mΩ

DS012582-19

A: Output Pin Voltage, 10V/div.

B: Inductor Current 0.5A/div.

C: Output Ripple Voltage, 100 mV/div.

Horizontal Time Base: 2 µs/div.

Load Transient Response for Continuous Mode

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

L = 32 µH, C

OUT = 220 µF, COUT ESR = 50 mΩ

DS012582-21

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

B: 500 mA to 2A Load Pulse

Horizontal Time Base: 50 µs/div.

Load Transient Response for Discontinuous Mode

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

L = 10 µH, C

OUT = 330 µF, COUT ESR = 45 mΩ

DS012582-22

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

B: 500 mA to 2A Load Pulse

Horizontal Time Base: 200 µs/div.

Bent and Staggered Leads, Through Hole Package

7-Lead TO-220 (T)

DS012582-50

Order Number LM2599T-3.3, LM2599T-5.0,

LM2599T-12 or LM2599T-ADJ

See NS Package Number TA07B

Surface Mount Package

7-Lead TO-263 (S)

DS012582-23

Order Number LM2599S-3.3, LM2599S-5.0,

LM2599S-12 or LM2599S-ADJ

See NS Package Number TS7B

LM2599 Datasheet(PDF) 7 Page - National Semiconductor (TI)

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