LM2675MX-ADJ/NOPB National Semiconductor, LM2675MX-ADJ/NOPB Datasheet - Page 17
![IC REG SW ADJ 1A STP DN 8-SOIC](/photos/6/56/65640/pkg_m08a_sml.jpg)
LM2675MX-ADJ/NOPB
Manufacturer Part Number
LM2675MX-ADJ/NOPB
Description
IC REG SW ADJ 1A STP DN 8-SOIC
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2675LD-5.0.pdf
(26 pages)
Specifications of LM2675MX-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
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Primary Input Voltage
40V
No. Of Outputs
1
Output Voltage
37V
Output Current
1A
No. Of Pins
8
Operating Temperature Range
-40°C To +125°C
Filter Terminals
SMD
Input Voltage Primary Max
40V
Rohs Compliant
Yes
For Use With
LM2675-5.0EVAL - EVALUATION BOARD FOR LM2675-5.0
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2675MX-ADJ
*LM2675MX-ADJ/NOPB
LM2675MX-ADJ
*LM2675MX-ADJ/NOPB
LM2675MX-ADJ
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2675MX-ADJ/NOPB
Manufacturer:
MURATA
Quantity:
400 000
Part Number:
LM2675MX-ADJ/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
To simplify the buck regulator design procedure, National
Semiconductor is making available computer design software to
be used with the SIMPLE SWITCHER line of switching
regulators. LM267X Made Simple version 6.0 is available for
use on Windows 3.1, NT, or 95 operating systems.
Given:
1. Programming Output Voltage (Selecting R
shown in Figure 3)
Use the following formula to select the appropriate resistor
values.
Select a value for R
resistor values minimize noise pickup in the sensitive feedback
pin. (For the lowest temperature coefficient and the best stability
with time, use 1% metal film resistors.)
where V
LM2675 Series Buck Regulator Design Procedure (Fixed Output)
LM2675 Series Buck Regulator Design Procedure (Adjustable Output)
V
V
I
F = Switching Frequency (Fixed at a nominal 260 kHz).
LOAD
OUT
IN
(max) = Maximum Input Voltage
PROCEDURE (Adjustable Output Voltage Version)
(max) = Maximum Load Current
= Regulated Output Voltage
REF
= 1.21V
1
between 240Ω and 1.5 kΩ. The lower
Recommended
Application Voltage
Recommended
Application Voltage
1
and R
2
3.3
2.5
3.3
10
12
15
12
18
24
29
, as
5
5
8
Sprague 594D
+85˚C Rating
+85˚C Rating
FIGURE 15.
AVX TPS
17
Given:
1. Programming Output Voltage (Selecting R
shown in Figure 3)
Select R
R
R
2
2
V
V
I
F = Switching Frequency (Fixed at a nominal 260 kHz).
LOAD
= 1k (16.53 − 1) = 15.53 kΩ, closest 1% value is 15.4 kΩ.
= 15.4 kΩ.
OUT
IN
Voltage
Rating
Voltage
Rating
(max) = 28V
EXAMPLE (Adjustable Output Voltage Version)
(max) = 1A
= 20V
1
to be 1 kΩ, 1%. Solve for R
6.3
6.3
10
20
25
35
10
16
20
25
35
50
4
2
.
1
(Continued)
and R
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2
, as