LM3481MMX/NOPB National Semiconductor, LM3481MMX/NOPB Datasheet - Page 17
![IC CTLR N-CH LOW SIDE HE 10MSOP](/photos/6/60/66087/pkg_mub10a_sml.jpg)
LM3481MMX/NOPB
Manufacturer Part Number
LM3481MMX/NOPB
Description
IC CTLR N-CH LOW SIDE HE 10MSOP
Manufacturer
National Semiconductor
Type
Step-Up (Boost), Flyback, Sepicr
Datasheet
1.LM3481MMNOPB.pdf
(22 pages)
Specifications of LM3481MMX/NOPB
Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
Adjustable
Current - Output
1A
Frequency - Switching
100kHz ~ 1MHz
Voltage - Input
2.97 ~ 48 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
For Use With
LM3481EVAL - BOARD EVAL FOR LM3481
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
LM3481MMX
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3481MMX/NOPB
Manufacturer:
TI
Quantity:
12 000
schematic shows the current flow during off-state. The bottom
schematic shows the currents we refer to as AC currents.
They are the most critical ones since current is changing in
very short time periods. The dotted lined traces of the bottom
schematic are the once to make as short as possible.
FIGURE 16. Current Flow In A Boost Application
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17
The PGND and AGND pins have to be connected to the same
ground very close to the IC. To avoid ground loop currents
attach all the grounds of the system only at one point.
A ceramic input capacitor should be connected as close as
possible to the Vin pin and grounded close to the GND pin.
For a layout example please see Application Note 1204. For
more information about layout in switch mode power supplies
please refer to Application Note 1229.
COMPENSATION
For detailed explanation on how to select the right compen-
sation components to attach to the compensation pin for a
boost topology please see Application Note 1286. When cal-
culating the Error Amplifier DC gain, A
the LM3481.
EA
, R
OUT
= 152 kΩ for
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