LM3478MAX/NOPB National Semiconductor, LM3478MAX/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM3478MAX/NOPB
• Description: IC CTRLR SW REG N-CH 8SOIC
• Manufacturer: National Semiconductor
• Series: -r

Specifications of LM3478MAX/NOPB

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 100%
• Voltage - Supply: 2.97 V ~ 40 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: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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V
V
V
V
Gm
A
I
V
T
T
T
V
I
I
T
T
θ
EAO
SD
FB
SS
r
f
SD
sh
JA
SL
SL
OVP
OVP(HYS)
VOL
EAO
SD
Symbol
ratio
Internal Compensation Ramp
Voltage
V
Output Over-voltage
Protection (with respect to
feedback voltage)
Output Over-Voltage
Protection
Error Ampifier
Transconductance
Error Amplifier Voltage Gain
Error Amplifier Output Current
(Source/ Sink)
Error Amplifier Output Voltage
Swing
Internal Soft-Start Delay
Drive Pin Rise Time
Drive Pin Fall Time
Shutdown threshold
Shutdown Pin Current
Feedback Pin Current
Thermal Shutdown
Thermal Shutdown Hysteresis
Thermal Resistance
SL
/V
SENSE
Parameter
Hysteresis(Note
(Note
(Note
8)
5)
8)
V
V
V
V
I
V
I
Source, V
Sink, V
Upper Limit
V
COMP Pin = Floating
Lower Limit
V
V
Cgs = 3000pf, V
Cgs = 3000pf, V
Output = High
Output = Low
V
V
MM Package
EAO
EAO
IN
COMP
COMP
COMP
COMP
FB
FB
FB
SD
SD
= 5V
= 0V
= 1.4V
= 1.2V, V
= 5V
= 0V
= 100µA (Source/Sink)
= 100µA (Source/Sink)
= 1.4V
= 1.4V
= 1.4V
= 1.4V
COMP
COMP
= 1.4V, V
Conditions
COMP
= 1.4V, V
DR
DR
= Floating
= 0 to 3V
= 0 to 3V
4
FB
FB
= 1.4V
= 0V
Typical
−140
0.49
0.56
1.27
0.65
800
110
165
200
2.2
92
50
60
38
25
25
−1
+1
15
10
4
−180/ −185
1000/ 1265
−100/ −85
600/ 365
140/ 180
32/ 25
78/ 85
80/ 50
Limit
0.30
0.70
132
110
1.8
2.4
0.2
1.0
1.4
0.3
52
20
26
44
µmho (max)
µmho (min)
V/V (max)
V/V (min)
mV(max)
mV(max)
mV(max)
µA (max)
µA (max)
mV(min)
mV(min)
mV(min)
µA (min)
µA (min)
V (max)
V(max)
V(max)
V (min)
V(min)
V(min)
Units
(max)
µmho
msec
°C/W
(min)
mV
mV
mV
V/V
µA
µA
µA
nA
°C
°C
ns
ns
V
V
V
V