LM3481QMM/NOPB National Semiconductor, LM3481QMM/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM3481QMM/NOPB
• Description: Low Side NFET Controller
• Manufacturer: National Semiconductor
• Series: -r

Specifications of LM3481QMM/NOPB

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 85%
• Voltage - Supply: 2.97 V ~ 48 V
• Buck: No
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

V
ΔV
ΔV
V
I
V
I
V
f
V
V
R
R
V
D
t
I
I
UVLO
COMP
nom
min
SUPPLY
Q
FB
UVLOSEN
UVLOSD
COMP
sync-HI
sync-LOW
DR (max)
DS1 (ON)
DS2 (ON)
max
Symbol
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
V
for T
min/max specification limits are guaranteed by design, test, or statistical analysis.
V
FB Pin Voltage
FA/SYNC/SD Pin Voltage
COMP Pin Voltage
UVLO Pin Voltage
V
DR Pin Voltage
I
Peak Driver Output Current
Power Dissipation
LINE
LOAD
SEN
IN
(on)
IN
CC
=12V, R
pin Voltage
J
Pin Voltage
Pin Voltage
= 25°C. Limits appearing in boldface type apply over the full Operating Temperature Range (-40°C to 125°C). Datasheet
Feedback Voltage
Feedback Voltage Line
Regulation
Output Voltage Load
Regulation
Undervoltage Lockout
Reference Voltage
UVLO Source Current
UVLO Shutdown Voltage
COMP pin Current Sink
Nominal Switching
Frequency
Threshold for
Synchronization on
FA/SYNC/SD pin
Threshold for
Synchronization on
FA/SYNC/SD pin
Driver Switch On
Resistance (top)
Driver Switch On
Resistance (bottom)
Maximum Drive Voltage
Swing(Note
Maximum Duty Cycle
Minimum On Time
Supply Current (switching)
Quiescent Current in
Shutdown Mode
FA
=40 kΩ unless otherwise indicated under the Conditions column. Typicals and limits appearing in plain type apply
Parameter
6)
V
2.97
2.97
I
V
Enabled
V
V
R
Synchronization Voltage
Rising
Synchronization Voltage
Falling
I
I
V
V
(Note
V
V
V
V
EAO
DR
DR
COMP
UVLO
FB
FB
IN
IN
FA/SYNC/SD
IN
FA/SYNC/SD
IN
FA
= 0.2A, V
= 0.2A
< 6V
≥
= 12V
= 5V
Internally Limited
= 0V
= 1.275V
–0.4V to 600 mV
= 40 kΩ
Source/Sink
≤
≤
6V
8)
Ramping Down
= 1.4V,
V
V
-0.4V to 50V
(Note
IN
IN
Conditions
-0.4V to 6V
-0.4V to 6V
-0.4V to 6V
-0.4V to 6V
-0.4V to 6V
-0.4V to 6V
≤
≤
=
=
IN
48V
48V
3V(Note
3V(Note
= 5V
1)
1.0A
9),
9),
3
Operating Ratings
Storage Temperature Range
Junction Temperature
ESD Susceptibilty
Lead Temperature
Supply Voltage
Junction Temperature Range
Switching Frequency
Range
Human Body Model
MM Package
Vapor Phase (60 sec.)
Infared (15 sec.)
1.256
1.345
Min
406
3
(Note
3,
Typical
1.275
0.003
1.430
±0.5
640
475
250
(Note
0.7
1.4
0.7
V
3.7
Note
85
5
1
4
2
6
9
5
IN
4)
2)
(Note
1.294
1.517
Max
550
5.0
15
10
6
1)
100 kHz to 1 MHz
−40°C to +125°C
−65°C to +150°C
2.97V to 48V
www.national.com
+150°C
Units
%/V
%/A
kHz
mA
215°C
220°C
µA
µA
µA
ns
%
Ω
Ω
V
V
V
V
V
V
V
2 kV