551011367-011/NOPB National Semiconductor, 551011367-011/NOPB Datasheet - Page 8

• Manufacturer Part Number: 551011367-011/NOPB
• Description: BOARD WEBENCH BUILD IT LM2598
• Manufacturer: National Semiconductor
• Series: WEBENCH® Buildit Boardr

Specifications of 551011367-011/NOPB

• Main Purpose: DC/DC, Step Down
• Regulator Topology: Buck
• Board Type: Bare (Unpopulated)
• Utilized Ic / Part: LM2598, LM2670, LM2673, LM2676, LM2677, LM2678, LM2679
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Output: -
• Voltage - Input: -
• Power - Output: -
• Frequency - Switching: -
• Outputs And Type: -
• Other names: *551011367-011; *551011367-011/NOPB; 551011367-011

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Typical Performance Characteristics
Continuous Mode Switching Waveforms
V
L = 68 µH, C
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.5A/div.
C: Output Ripple Voltage, 50 mV/div.
Load Transient Response for Continuous Mode
V
L = 68 µH, C
A: Output Voltage, 100 mV/div. (AC)
B: 250 mA to 750 mA Load Pulse
IN
IN
= 20V, V
= 20V, V
Horizontal Time Base: 100 µs/div.
OUT
OUT
Horizontal Time Base: 2 µs/div.
OUT
OUT
= 5V, I
= 5V, I
= 120 µF, C
= 120 µF, C
LOAD
LOAD
= 1A
= 250 mA to 750 mA
OUT
OUT
ESR = 100 m
ESR = 100 m
DS012593-18
DS012593-20
(Circuit of Figure 1 )
Discontinuous Mode Switching Waveforms
V
L = 22 µH, C
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.5A/div.
C: Output Ripple Voltage, 50 mV/div.
Load Transient Response for Discontinuous Mode
V
L = 22 µH, C
A: Output Voltage, 100 mV/div. (AC)
B: 250 mA to 750 mA Load Pulse
8
IN
IN
= 20V, V
= 20V, V
Horizontal Time Base: 200 µs/div.
OUT
OUT
Horizontal Time Base: 2 µs/div.
OUT
OUT
= 5V, I
= 5V, I
= 220 µF, C
= 220 µF, C
LOAD
LOAD
= 600 mA
= 250 mA to 750 mA
OUT
OUT
ESR = 50 m
ESR = 50 m
DS012593-19
DS012593-21