LM3478 MDC National Semiconductor, LM3478 MDC Datasheet - Page 3

• Manufacturer Part Number: LM3478 MDC
• Description: LM3478/LM3478Q High Efficiency Low-Side N-Channel Controller for Switching Regulator; ; Container: Tray
• Manufacturer: National Semiconductor

V
ΔV
ΔV
V
V
F
R
R
V
D
T
I
I
V
V
SUPPLY
Q
nom
min
FB
UVLO
UV(HYS)
DR (max)
SENSE
SC
DS1 (ON)
DS2 (ON)
max
Input Voltage
FB Pin Voltage
FA/SD Pin Voltage
Peak Driver Output Current (<10µs)
Power Dissipation
Storage Temperature Range
Junction Temperature
ESD Susceptibilty
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Specifications in Standard type face are for T
Range. Unless otherwise specified, V
Symbol
LINE
LOAD
(on)
Human Body Model (Note 2)
Feedback Voltage
Feedback Voltage Line
Regulation
Output Voltage Load
Regulation
Input Undervoltage Lock-out
Input Undervoltage Lock-out
Hysteresis
Nominal Switching Frequency R
Driver Switch On Resistance
(top)
Driver Switch On Resistance
(bottom)
Maximum Drive Voltage
Swing(Note 6)
Maximum Duty Cycle(Note 7)
Minimum On Time
Supply Current (non-
switching)
Quiescent Current in
Shutdown Mode
Current Sense Threshold
Voltage
Short-Circuit Current Limit
Sense Voltage
Parameter
IN
= 12V, R
-0.4V < V
Internally Limited
−65°C to +150°C
-0.4V < V
V
2.97
2.97
I
I
I
V
V
(Note 9)
V
V
V
V
EAO
DR
DR
J
COMP
FA
IN
IN
FA/SD
IN
IN
IN
= 25°C, and in bold type face apply over the full Operating Temperature
(Note 1)
= 0.2A, V
= 0.2A
< 7.2V
≥
= 5V
= 5V
= 5V
= 40KΩ
Source/Sink
FA
≤
≤
7.2V
FA/SD
= 5V (Note 10),
= 1.4V,
V
V
= 40kΩ
+150°C
IN
IN
FB
≤
≤
< 7V
< 7V
1.0A
45V
2kV
IN
Conditions
40V
40V
= 5V
3
Lead Temperature
DR Pin Voltage
I
Operating Ratings
SEN
Supply Voltage
Junction Temperature
Range
Switching Frequency
MM Package
Vapor Phase (60 sec.)
Infared (15 sec.)
Pin Voltage
Typical
0.001
1.26
±0.5
2.85
170
400
100
325
156
343
4.5
V
7.2
2.7
16
5
IN
1.2416/1.228
1.2843/1.292
(Note 1)
135/ 125
180/ 190
100kHz
Limit
2.97
130
210
350
440
210
600
250
415
3.3
−40°C
10
2.97V
−0.4V
≤
≤
F
T
≤
≤
SW
J
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V
≤
VDR
%/V (max)
nsec(max)
nsec(min)
mV (max)
kHz(max)
mA (max)
mV (max)
mV (max)
IN
mV (min)
kHz(min)
µA (max)
mV (min)
mV (min)
≤
+125°C
V(max)
V(max)
V(min)
Units
nsec
500mV
≤
%/V
kHz
1MHz
mV
mA
mV
mV
215°C
260°C
µA
%
Ω
Ω
V
V
V
≤
40V
8V