LM22673TJ-ADJ/NOPB National Semiconductor, LM22673TJ-ADJ/NOPB Datasheet - Page 3
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LM22673TJ-ADJ/NOPB
Manufacturer Part Number
LM22673TJ-ADJ/NOPB
Description
IC REG SWITCH BUC 3A ADJ TO263-7
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM22673MRE-ADJNOPB.pdf
(18 pages)
Specifications of LM22673TJ-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
TO-263-7 Thin
For Use With
551600233-001 - WEBENCH BUILD IT LM2267X TO-263LM22673EVAL - BOARD EVALUATION FOR LM22673
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
LM22673TJ-ADJ
Pin Numbers
Pin Descriptions
Package
PSOP-8
1
2
3
4
5
6
7
8
Pin Numbers
TO-263 THIN
Package
3
5
6
7
4
2
1
-
BOOT
Name
IADJ
GND
VIN
SW
NC
SS
FB
Description
Bootstrap input
Not Connected
Current limit setting pin
Feedback pin
Soft-Start pin
System ground
Source input voltage
Switch pin
3
Application Information
Provides the gate voltage for the high side NFET.
Pin is not electrically connected inside the chip. Pin
does function as thermal conductor.
A resistor attached between this pin and GND can be
used to set the current limit threshold. Pin can be left
floating and internal setting will be default.
Inverting input to the internal voltage error amplifier.
An external capacitor and an internal 50 µA current
source set the time constant for the rise of the error
amplifier reference. Pin can be left floating and internal
soft-start will be default.
Provide good capacitive decoupling between VIN and
this pin.
Input to the regulator. Operates from 4.5V to 42V.
Attaches to the switch node.
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