LM3488MM National Semiconductor, LM3488MM Datasheet - Page 11
![IC, N-CH CONTROLLER, MSOP-8](/photos/18/97/189768/3778330_sml.jpg)
LM3488MM
Manufacturer Part Number
LM3488MM
Description
IC, N-CH CONTROLLER, MSOP-8
Manufacturer
National Semiconductor
Datasheet
1.LM3488MM.pdf
(24 pages)
Specifications of LM3488MM
Primary Input Voltage
40V
No. Of Outputs
1
Output Current
1A
No. Of Pins
8
Operating Temperature Range
-40°C To +125°C
Termination Type
SMD
Input Voltage Primary Min
2.95V
Output Voltage Min
1.26V
Rohs Compliant
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM3488MM
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM3488MM/NOPB
Manufacturer:
TI
Quantity:
15 540
Part Number:
LM3488MMX
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM3488MMX/NOPB
Manufacturer:
ATMEL
Quantity:
3 410
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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