LM2675N-3.3 National Semiconductor, LM2675N-3.3 Datasheet - Page 8

• Manufacturer Part Number: LM2675N-3.3
• Description: IC, STEP-DOWN REGULATOR, 8-DIP
• Manufacturer: National Semiconductor

Specifications of LM2675N-3.3

• Primary Input Voltage: 12V
• No. Of Outputs: 1
• Output Voltage: 3.3V
• Output Current: 1A
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +125°C
• Supply Voltage Range: 6.5V To 40V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Typical Performance Characteristics
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: 200 mA to 1A Load Pulse
SW
Load Transient Response for Continuous Mode
Pin Voltage, 10 V/div.
L = 47 µH, C
L = 47 µH, C
Continuous Mode Switching Waveforms
V
V
Horizontal Time Base: 50 µs/div
Horizontal Time Base: 1 µs/div
IN
IN
= 20V, V
= 20V, V
OUT
OUT
= 68 µF, C
= 68 µF, C
OUT
OUT
= 5V, I
= 5V, I
OUT
OUT
LOAD
LOAD
ESR = 50 mΩ
ESR = 50 mΩ
= 1A
= 1A
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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
L = 15 µH, C
Pin Voltage, 10 V/div.
L = 47 µH, C
Discontinuous Mode Switching Waveforms
V
IN
Horizontal Time Base: 200 µs/div
Horizontal Time Base: 1 µs/div
= 20V, V
OUT
V
OUT
IN
= 68 µF (2x), 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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