LM3477MM National Semiconductor, LM3477MM Datasheet - Page 3

• Manufacturer Part Number: LM3477MM
• Description: Pulse Width Modulation (PWM) Controller IC
• Manufacturer: National Semiconductor

Specifications of LM3477MM

• Input Voltage Primary Min: 2.95V
• Mounting Type: Surface Mount
• Topology: Buck (Step Down)
• Control Mode: Current
• Duty Cycle Max: 93%
• Input Voltage Primary Max: 35V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

V
∆V
∆V
V
V
F
R
R
(V
D
T
I
I
SUPPLY
Q
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
SW
min
Specifications in Standard type face are for T
Range. Unless otherwise specified, V
FB
UVLO
UV(HYS)
Input Voltage
Peak Driver Output Current (
CB Pin Voltage (Note 2)
I
Power Dissipation
Storage Temperature Range
Junction Temperature
ESD Susceptibilty (Note 3)
DS1 (ON)
DS2 (ON)
max
SEN
Symbol
CB
LINE
LOAD
Human Body Model
Machine Model
−V
(on)
Pin Voltage
SW
)
max
Feedback Voltage
Feedback Voltage Line
Regulation
Output Voltage Load Regulation
Input Undervoltage Lock-out
Input Undervoltage Lock-out
Hysteresis
Switching Frequency
Driver Switch On Resistance
(top)
Driver Switch On Resistance
(bottom)
Maximum Boot Voltage
Maximum Duty Cycle
Minimum On Time
Supply Current (switching)
Quiescent Current in Shutdown
Mode
Parameter
<
10µs)
IN
= 12V.
(Note 4)
Internally Limited
−65˚C to +150˚C
J
= 25˚C, and in bold type face apply over the full Operating Temperature
(Note 1)
V
2.97V ≤ V
2.97V ≤ V
I
I
V
V
(Note 5)
(Note 6), V
+150˚C
500mV
DR
DR
COMP
IN
IN
200V
1.0A
36V
43V
2kV
≥ 7.2V
= 0.2A, V
= 0.2A
<
7.2V
Conditions
= 1.4V,
IN
IN
3
IN
≤ 36V
≤ 36V
IN
= 5V
Operating Ratings
Lead Temperature for MSOP Package
Supply Voltage
Junction
Temperature Range
= 5V
Vapor Phase (60 sec.)
Infared (15 sec.)
Typical
1.270
0.001
±
2.87
180
500
330
V
7.2
2.0
93
0.5
7
4
5
IN
1.260/1.252
1.288/1.290
(Note 1)
Limit
2.97
130
225
435
575
230
495
3.0
88
8
−40˚C ≤ T
2.97V ≤ V
%/V (max)
J
www.national.com
nsec(max)
mV (max)
nsec(min)
mA (max)
kHz(max)
mV (min)
µA (max)
kHz(min)
≤ +125˚C
V(max)
V(max)
%(min)
IN
V(min)
Units
nsec
%/V
kHz
mV
mA
µA
%
Ω
Ω
≤ 35V
V
V
V
215˚C
220˚C