LM3488MM/NOPB National Semiconductor, LM3488MM/NOPB Datasheet - Page 11
![IC CTRLR SWITCH REG N-CH 8-MSOP](/photos/6/57/65756/pkg_mua08a_sml.jpg)
LM3488MM/NOPB
Manufacturer Part Number
LM3488MM/NOPB
Description
IC CTRLR SWITCH REG N-CH 8-MSOP
Manufacturer
National Semiconductor
Type
Step-Up (Boost), Flyback, Sepicr
Datasheet
1.LM3488MMNOPB.pdf
(24 pages)
Specifications of LM3488MM/NOPB
Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
Adj to 1.26V
Current - Output
1A
Frequency - Switching
100kHz ~ 1MHz
Voltage - Input
2.97 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
LM3488MM
LM3488MM
LM3488MMTR
LM3488MM
LM3488MMTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3488MM/NOPB
Manufacturer:
TI
Quantity:
15 540
The compensation ramp has been added internally in
LM3488. The slope of this compensation ramp has been se-
lected to satisfy most of the applications. The slope of the
internal compensation ramp depends on the frequency. This
slope can be calculated using the formula:
In the above equation, V
compensation ramp. Limits for V
electrical characteristics.
In order to provide the user additional flexibility, a patented
scheme has been implemented inside the IC to increase the
slope of the compensation ramp externally, if the need arises.
Adding a single external resistor, R
increases the slope of the compensation ramp, M
M
C
= V
SL
SL
.F
S
is the amplitude of the internal
FIGURE 3. Compensation Ramp Avoids Sub-Harmonic Oscillation
Volts/second
SL
FIGURE 4. Increasing the Slope of the Compensation Ramp
have been specified in the
SL
(as shown in
C
Figure
by :
4)
11
In this equation, ΔV
ΔV
quencies.
SL
versus R
SL
has been plotted in
SL
is equal to 40.10
10138813
Figure 5
-6
R
SL
. Hence,
for different fre-
10138811
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