LM2670SX-ADJ/NOPB National Semiconductor, LM2670SX-ADJ/NOPB Datasheet - Page 8

• Manufacturer Part Number: LM2670SX-ADJ/NOPB
• Description: IC REG SW ADJ 3A STP DN TO-263-7
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2670SX-ADJ/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.2 ~ 37 V
• Current - Output: 3A
• Frequency - Switching: 260kHz
• Voltage - Input: 8 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (7 leads + tab)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2670SX-ADJ; *LM2670SX-ADJ/NOPB; LM2670SX-ADJ

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Typical Performance Characteristics
A: V
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
A: Output Voltage, 100 mV//div, AC-Coupled.
B: Load Current: 500 mA to 3A Load Pulse
SW
Pin Voltage, 10 V/div.
Load Transient Response for Continuous Mode
L = 33 μH, C
L = 33 μH, C
Continuous Mode Switching Waveforms
Horizontal Time Base: 100 μs/div
V
Horizontal Time Base: 1 μs/div
IN
= 20V, V
V
OUT
OUT
IN
= 20V, V
= 200 μF, C
= 200 μF, C
OUT
= 5V, I
OUT
OUT
OUT
= 5V
LOAD
ESR = 26 mΩ
ESR = 26 mΩ
= 3A
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A: V
B: Inductor Current, 1 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 3A Load Pulse
SW
Load Transient Response for Discontinuous Mode
Pin Voltage, 10 V/div.
Discontinuous Mode Switching Waveforms
L = 10 μH, C
L = 10 μH, C
V
IN
Horizontal Time Base: 200 μs/div
Horizontal Time Base: 1 μs//iv
= 20V, V
V
OUT
OUT
IN
= 20V, V
OUT
= 400 μF, C
= 400 μF, C
= 5V, I
OUT
LOAD
= 5V,
OUT
OUT
ESR = 13 mΩ
ESR = 13 mΩ
= 500 mA
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