SNOS658D – JUNE 1999 – REVISED APRIL 2013
Electrical Characteristics—LM1577-15, LM2577-15 (continued)
Specifications with standard type face are for T
J
= 25°C, and those in
bold type face
apply over full
Operating Temperature
Range.
Unless otherwise specified, V
IN
= 5V, and I
SWITCH
= 0.
Symbol
Parameter
Error Amplifier
Output Swing
Conditions
Upper Limit
V
FEEDBACK
= 12.0V
Lower Limit
V
FEEDBACK
= 18.0V
Error Amp
Output Current
V
FEEDBACK
= 12.0V to 18.0V
V
COMP
= 1.0V
Typical
2.4
2.2/2.0
0.3
0.4/0.55
±200
±130/±90
±300/±400
I
SS
Soft Start Current
V
FEEDBACK
= 12.0V
V
COMP
= 0V
5.0
2.5/1.5
7.5/9.5
D
Maximum Duty
Cycle
Switch
Transconductance
I
L
Switch Leakage
Current
Switch Saturation
Voltage
NPN Switch
Current Limit
V
SWITCH
= 65V
V
FEEDBACK
= 18.0V
(Switch Off)
I
SWITCH
= 2.0A
V
COMP
= 2.0V
(Max Duty Cycle)
V
COMP
= 2.0V
V
COMP
= 1.5V
I
SWITCH
= 100 mA
95
93/90
12.5
93/90
2.5/1.5
7.5/9.5
±130/±90
±300/±400
0.40/0.55
2.2/2.0
LM1577-15
Limit
(1) (2)
LM2577-15
Limit
(3)
Units
(Limits)
V
V(min)
V
V(max)
μA
μA(min)
μA(max)
μA
μA(min)
μA(max)
%
%(min)
A/V
10
300/600
0.5
0.7/0.9
4.3
3.7/3.0
5.3/6.0
3.7/3.0
5.3/6.0
0.7/0.9
300/600
μA
μA(max)
V
V(max)
A
A(min)
A(max)
V
SAT
6
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