LM3478 MDC National Semiconductor, LM3478 MDC Datasheet - Page 4

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

www.national.com
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
OVP
OVP(HYS)
VOL
EAO
SD
Symbol
Internal Compensation Ramp
Voltage
Output Over-voltage
Protection (with respect to
feedback voltage) (Note 8)
Output Over-Voltage
Protection Hysteresis(Note 8)
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 (Note 5)
Shutdown Pin Current
Feedback Pin Current
Thermal Shutdown
Thermal Shutdown Hysteresis
Thermal Resistance
Parameter
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
0.56
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
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
µmho
msec
°C/W
mV
mV
mV
V/V
µA
µA
µA
nA
°C
°C
ns
ns
V
V
V
V