lm3478-mdc National Semiconductor Corporation, lm3478-mdc Datasheet - Page 3

• Manufacturer Part Number: lm3478-mdc
• Description: High Efficiency Low-side N-channel Controller For Switching Regulator
• Manufacturer: National Semiconductor Corporation

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
∆V
∆V
V
V
F
R
R
V
D
T
I
I
V
Input Voltage
FB Pin Voltage
FA/SD Pin Voltage
Peak Driver Output Current (
Power Dissipation
Storage Temperature Range
Junction Temperature
ESD Susceptibilty
SUPPLY
Q
Symbol
nom
min
Specifications in Standard type face are for T
Range. Unless otherwise specified, V
FB
UVLO
UV(HYS)
DR (max)
SENSE
DS1 (ON)
DS2 (ON)
max
Human Body Model (Note 2)
LINE
LOAD
(on)
Feedback Voltage
Feedback Voltage
Line Regulation
Output Voltage Load
Regulation
Input Undervoltage
Lock-out
Input Undervoltage
Lock-out Hysteresis
Nominal Switching
Frequency
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
(switching)
Quiescent Current in
Shutdown Mode
Current Sense
Threshold Voltage
Parameter
<
10µs)
IN
-0.4V
= 12V, R
-0.4V
Internally Limited
−65˚C to +150˚C
V
2.97 ≤ V
2.97 ≤ V
I
R
I
I
V
V
(Note 9)
V
10), V
V
EAO
DR
DR
COMP
IN
IN
FA/SYNC/SD
IN
FA
(Note 1)
J
<
= 25˚C, and in bold type face apply over the full Operating Temperature
<
= 0.2A, V
= 0.2A
<
≥ 7.2V
= 5V
= 40KΩ
Source/Sink
V
FA
V
IN
7.2V
FB
Conditions
FA/SD
+150˚C
= 1.4V,
IN
IN
= 5V
= 40kΩ
<
1.0A
≤ 40V
≤ 40V
45V
2kV
7V
7V
= 5V (Note
<
IN
= 5V
3
Operating Ratings
Lead Temperature
DR Pin Voltage
I
Supply Voltage
Junction
Temperature Range
Switching Frequency
SEN
MM Package
Vapor Phase (60 sec.)
Infared (15 sec.)
Pin Voltage
Typical
0.001
1.26
±
2.85
170
400
100
325
165
4.5
V
7.2
2.0
16
0.5
5
IN
1.2416/1.228
1.2843/1.292
140/ 135
195/ 200
(Note 1)
Limit
2.97
130
210
360
430
210
600
3.0
10
100kHz ≤ F
−40˚C ≤ T
2.97V ≤ V
−0.4V ≤ VDR ≤ 8V
%/V (max)
SW
J
nsec(max)
mV (max)
nsec(min)
mA (max)
mV (max)
www.national.com
kHz(max)
mV (min)
µA (max)
mV (min)
kHz(min)
≤ +125˚C
V(max)
V(max)
V(min)
IN
Units
nsec
≤ 1MHz
%/V
kHz
mV
mA
mV
µA
%
Ω
Ω
V
V
V
≤ 40V
500mV
215˚C
220˚C