LM2671M-12/NOPB National Semiconductor, LM2671M-12/NOPB Datasheet - Page 8

• Manufacturer Part Number: LM2671M-12/NOPB
• Description: IC REG SIMPLE SWITCHER 8-SOIC
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2671M-12/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 12V
• Current - Output: 500mA
• Frequency - Switching: 260kHz
• Voltage - Input: 6.5 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2671M-12; *LM2671M-12/NOPB; LM2671M-12

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Typical Performance Characteristics
A: V
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 50 mV/div AC-Coupled
A: Output Voltage, 100 mV/div, AC-Coupled
B: Load Current: 100 mA to 500 mA Load Pulse
SW
Pin Voltage, 10 V/div.
Load Transient Response for Continuous Mode
L = 100 μH, C
L = 100 μH, C
Continuous Mode Switching Waveforms
V
IN
Horizontal Time Base: 50 μs/div
Horizontal Time Base: 1 μs/div
= 20V, V
V
IN
OUT
OUT
= 20V, V
OUT
= 100 μF, C
= 100 μF, C
= 5V, I
OUT
LOAD
= 5V
OUT
OUT
= 500 mA
ESR = 0.1Ω
ESR = 0.1Ω
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(Circuit of Figure 2)
A: V
B: Inductor Current, 0.5 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
A: Output Voltage, 100 mV/div, AC-Coupled
B: Load Current: 100 mA to 400 mA Load Pulse
SW
Load Transient Response for Discontinuous Mode
Pin Voltage, 10 V/div.
L = 15 μH, C
Discontinuous Mode Switching Waveforms
L = 47 μH, C
V
IN
Horizontal Time Base: 200 μs/div
Horizontal Time Base: 1 μs/div
= 20V, V
OUT
V
OUT
IN
= 68 μF (2×), C
= 20V, V
OUT
= 68 μF, C
= 5V, I
OUT
LOAD
OUT
= 5V,
OUT
ESR = 50 mΩ
= 300 mA
ESR = 25 mΩ
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