LM22673MR-ADJ/NOPB National Semiconductor, LM22673MR-ADJ/NOPB Datasheet - Page 5

• Manufacturer Part Number: LM22673MR-ADJ/NOPB
• Description: IC REG SWITCH BUCK 3A ADJ 8PSOP
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM22673MR-ADJ/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 1.285V
• Current - Output: 3A
• Frequency - Switching: 500kHz
• Voltage - Input: 4.5 ~ 42 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-PSOP
• Package: 8PSOP EP
• Minimum Input Voltage: 4.5 V
• Maximum Input Voltage: 42 V
• Switching Frequency: 500(Typ) KHz
• Operating Supply Voltage: 4.5 to 42 V
• Maximum Output Current: 3 A
• Output Type: Adjustable
• Output Voltage: 1.285(Min) V
• Efficiency: 90(Min) %
• For Use With: 551600236-001 - WEBENCH BUILD IT LM2267X 8-PSOPLM22673EVAL - BOARD EVALUATION FOR LM22673
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: LM22673MR-ADJ

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the recommended Operating Ratings is not implied. The recommended Operating Ratings indicate conditions at which the device is functional and should not be
operated beyond such conditions.
Note 2: The absolute maximum specification of the ‘SW to GND’ applies to DC voltage. An extended negative voltage limit of -10V applies to a pulse of up to 50
ns.
Note 3: ESD was applied using the human body model, a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 4: Typical values represent most likely parametric norms at the conditions specified and are not guaranteed.
Note 5: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 6: The value of θ
20 to 30°C/W depending on the amount of PCB copper dedicated to heat transfer. See application note AN-1797 for more information.
Note 7: The value of θ
range from 42 to 115°C/W depending on the amount of PCB copper dedicated to heat transfer.
Typical Performance Characteristics
12V, T
Normalized Switching Frequency vs Temperature
J
= 25°C.
JA
JA
Efficiency vs I
for the TO-263 THIN (TJ) package of 22°C/W is valid if package is mounted to 1 square inch of copper. The θ
for the PSOP-8 exposed pad (MR) package of 60°C/W is valid if package is mounted to 1 square inch of copper. The θ
V
OUT
= 3.3V
OUT
and V
IN
30076204
30076227
5
Unless otherwise specified the following conditions apply: Vin =
Feedback Bias Current vs Temperature
Current Limit vs Temperature
JA
value can range from
30076205
30076203
JA
www.national.com
value can