LM2577N-12 National Semiconductor, LM2577N-12 Datasheet - Page 4

• Manufacturer Part Number: LM2577N-12
• Description: SIMPLE SWITCHER Step-Up Voltage Regulator
• Manufacturer: National Semiconductor

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DEVICE PARAMETERS
f
V
R
G
A
I
D
I
V
O
SS
L
Specifications with standard type face are for T
Range. Unless otherwise specified, V
REF
VOL
SAT
FB
Electrical Characteristics — LM1577-15, LM2577-15
M
Symbol
Undervoltage
Lockout
Oscillator Frequency
Output Reference
Voltage
Output Reference
Voltage Line Regulation
Feedback Pin Input
Voltage Line Regulator
Error Amp
Transconductance
Error Amp
Voltage Gain
Error Amplifier
Output Swing
Error Amp
Output Current
Soft Start Current
Maximum Duty
Cycle
Switch
Transconductance
Switch Leakage
Current
Switch Saturation
Voltage
NPN Switch
Current Limit
Parameter
IN
= 5V, and I
Measured at Switch Pin
I
Measured at Feedback Pin
V
V
V
I
V
V
R
(Note 7)
Upper Limit
V
Lower Limit
V
V
V
V
V
V
I
V
V
(Switch Off)
I
V
(Max Duty Cycle)
V
SWITCH
COMP
SWITCH
SWITCH
IN
COMP
IN
COMP
COMP
FEEDBACK
FEEDBACK
FEEDBACK
COMP
FEEDBACK
COMP
COMP
SWITCH
FEEDBACK
COMP
COMP
COMP
J
= 3.5V to 40V
= 3.5V to 40V
= 25˚C, and those in bold type face apply over full Operating Temperature
= −30 µA to +30 µA
= 1.0V
= 1.0V
= 1.1V to 1.9V
= 1.0 M
= 1.0V
= 0V
= 1.5V
= 2.0V
= 2.0V
SWITCH
= 100 mA
= 100 mA
= 2.0A
= 65V
Conditions
= 12.0V
= 18.0V
= 12.0V to 18.0V
= 12.0V
= 18.0V
= 0.
4
Typical
±
12.2
12.5
300
2.4
0.3
5.0
0.5
4.3
52
15
10
65
95
10
200
(Continued)
(Notes 3, 4)
14.70/14.55
15.30/15.45
LM1577-15
±
±
2.70/2.65
3.10/3.15
170/110
420/500
0.4/0.55
300/
300/600
2.2/2.0
130/
2.5/1.5
7.5/9.5
0.7/0.9
3.7/3.0
5.3/6.0
Limit
48/42
56/62
40/20
93/90
±
±
400
90
14.70/14.55
15.30/15.45
LM2577-15
±
±
2.70/2.65
3.10/3.15
0.40/0.55
(Note 5)
170/110
420/500
300/
300/600
2.2/2.0
130/
2.5/1.5
7.5/9.5
0.7/0.9
3.7/3.0
5.3/6.0
48/42
56/62
40/20
93/90
Limit
±
±
400
90
µmho(max)
µmho(min)
kHz(max)
kHz(min)
V/V(min)
µA(max)
µA(max)
µA(max)
(Limits)
µA(min)
µA(min)
V(max)
V(max)
V(max)
%(min)
V(max)
A(max)
V(min)
V(min)
V(min)
A(min)
Units
µmho
kHz
V/V
A/V
mV
k
µA
µA
µA
%
V
V
V
V
A