LM2672N-ADJ/NOPB National Semiconductor, LM2672N-ADJ/NOPB Datasheet - Page 9

• Manufacturer Part Number: LM2672N-ADJ/NOPB
• Description: IC REG SIMPLE SWITCHER 8-DIP
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2672N-ADJ/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.21 ~ 37 V
• Current - Output: 1A
• Frequency - Switching: 260kHz
• Voltage - Input: 6.5 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Msl: MSL 1 - Unlimited
• Supply Voltage Range: 6.5V To 40V
• Driver Case Style: DIP
• No. Of Pins: 8
• Output Voltage Min: 1.23V
• Voltage Regulator Type: Switching
• Rohs Compliant: Yes
• Input Voltage Primary Max: 40V
• No. Of Outputs: 1
• Operating Temperature Range: -40°C To +125°C
• Output Current: 1.55A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2672N-ADJ; *LM2672N-ADJ/NOPB; LM2672N-ADJ

Test Circuit and Layout Guidelines
C
C
D1 - 3.3A, 50V Schottky Rectifier, IR 30WQ05F
L1 - 68 μH Sumida #RCR110D-680L
C
C
C
D1 - 3.3A, 50V Schottky Rectifier, IR 30WQ05F
L1 - 68 μH Sumida #RCR110D-680L
R1 - 1.5 kΩ, 1%
C
For a 5V output, select R2 to be 4.75 kΩ, 1%
where V
Use a 1% resistor for best stability.
IN
OUT
B
IN
OUT
B
- 0.01 μF, 50V Ceramic
- 0.01 μF, 50V Ceramic
- 22 μF, 50V Tantalum, Sprague “199D Series”
- 22 μF, 50V Tantalum, Sprague “199D Series”
- 47 μF, 25V Tantalum, Sprague “595D Series”
- 47 μF, 25V Tantalum, Sprague “595D Series”
REF
= 1.21V
FIGURE 2. Standard Test Circuits and Layout Guides
FIGURE 3. Standard Test Circuits and Layout Guides
Adjustable Output Voltage Versions
Fixed Output Voltage Versions
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