LM2679T-ADJ/NOPB National Semiconductor, LM2679T-ADJ/NOPB Datasheet - Page 8

• Manufacturer Part Number: LM2679T-ADJ/NOPB
• Description: IC REG SIMPLE SWITCHER TO-220-7
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2679T-ADJ/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.2 ~ 37 V
• Current - Output: 5A
• Frequency - Switching: 260kHz
• Voltage - Input: 8 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-220-7 (Bent and Staggered Leads)
• Primary Input Voltage: 40V
• No. Of Outputs: 1
• Output Voltage: 37V
• Output Current: 5A
• No. Of Pins: 7
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Filter Terminals: Through Hole
• Rohs Compliant: Yes
• Dc To Dc Converter Type: Step Down
• Pin Count: 7 +Tab
• Input Voltage: 40V
• Switching Freq: 260KHz
• Efficiency: 84%
• Package Type: TO-220
• Output Type: Adjustable
• Switching Regulator: Yes
• Mounting: Through Hole
• Input Voltage (min): 8V
• Operating Temperature Classification: Automotive
• For Use With: LM2679-5.0EVAL - EVALUATION BOARD FOR LM2679-5.0
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Compliant
• Other names: *LM2679T-ADJ; *LM2679T-ADJ/NOPB; LM2679T-ADJ

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A: Output Voltage, 100 mV//div, AC-Coupled.
B: Load Current: 500 mA to 5A Load Pulse
Block Diagram
* Active Inductor Patent Number 5,514,947
† Active Capacitor Patent Number 5,382,918
Load Transient Response for Continuous Mode
L = 10 μH, C
Horizontal Time Base: 100 μs/div
V
OUT
IN
= 20V, V
= 400 μF, C
OUT
OUT
= 5V
ESR = 13 mΩ
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8
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 200 mA to 3A Load Pulse
Load Transient Response for Discontinuous Mode
L = 10 μH, C
Horizontal Time Base: 200 μs/div
V
OUT
IN
= 20V, V
= 400 μF, C
OUT
= 5V,
OUT
ESR = 13 mΩ
10084718
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