LM2671N-5.0 National Semiconductor, LM2671N-5.0 Datasheet - Page 7

• Manufacturer Part Number: LM2671N-5.0
• Description: DC/DC Converter IC
• Manufacturer: National Semiconductor

Specifications of LM2671N-5.0

• Input Voltage: 40V
• Output Current: 500mA
• Output Voltage: 5V
• No. Of Pins: 8
• Mounting Type: Through Hole
• Voltage Regulator Type: Buck Switching
• Output Current Max: 0.5A
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Block Diagram
* Patent Number 5,514,947
†
Typical Performance Characteristics
A: V
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 50 mV/div AC-Coupled
Patent Number 5,382,918
SW
L = 100 µH, C
Pin Voltage, 10 V/div.
Continuous Mode Switching Waveforms
V
IN
Horizontal Time Base: 1 µs/div
= 20V, V
OUT
OUT
= 100 µF, C
= 5V, I
LOAD
OUT
= 500 mA
ESR = 0.1
DS100042-18
FIGURE 1.
(Circuit of Figure 2 )
A: V
B: Inductor Current, 0.5 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
7
SW
L = 15 µH, C
Pin Voltage, 10 V/div.
Discontinuous Mode Switching Waveforms
V
IN
Horizontal Time Base: 1 µs/div
= 20V, V
OUT
= 68 µF (2x), C
OUT
= 5V, I
LOAD
OUT
= 300 mA
ESR = 25 m
DS100042-19
DS100042-17
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