LM2577N-12 National Semiconductor, LM2577N-12 Datasheet - Page 3

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

DEVICE PARAMETERS
I
D
I
V
SYSTEM PARAMETERS Circuit of Figure 2 (Note 6)
V
DEVICE PARAMETERS
I
V
SS
L
S
Specifications with standard type face are for T
Range. Unless otherwise specified, V
Specifications with standard type face are for T
Range. Unless otherwise specified, V
SAT
OUT
UV
Electrical Characteristics — LM1577-12, LM2577-12
Electrical Characteristics — LM1577-15, LM2577-15
Symbol
Symbol
Error Amplifier
Output Swing
Error Amplifier
Output Current
Soft Start Current
Maximum Duty Cycle
Switch
Transconductance
Switch Leakage
Current
Switch Saturation
Voltage
NPN Switch
Current Limit
Output Voltage
Line Regulation
Load Regulation
Efficiency
Input Supply Current
Input Supply
Parameter
Parameter
IN
IN
Upper Limit
V
Lower Limit
V
V
V
V
V
V
I
V
V
I
V
= 5V, and I
= 5V, and I
SWITCH
SWITCH
FEEDBACK
FEEDBACK
FEEDBACK
COMP
FEEDBACK
COMP
COMP
SWITCH
FEEDBACK
COMP
V
I
(Note 3)
V
I
V
I
V
V
(Switch Off)
I
V
(Max Duty Cycle)
I
LOAD
LOAD
LOAD
SWITCH
SWITCH
IN
IN
IN
IN
FEEDBACK
COMP
J
J
= 1.0V
= 0V
= 1.5V
= 2.0V (Max Duty Cycle)
= 5V to 12V
= 3.5V to 12V
= 5V
= 5V, I
= 100 mA
= 2.0A
= 25˚C, and those in bold type face apply over full Operating Temperature
= 25˚C, and those in bold type face apply over full Operating Temperature
= 65V
= 100 mA to 600 mA
= 300 mA
= 100 mA to 600 mA
= 2.0V
Conditions
SWITCH
SWITCH
= 10.0V
= 15.0V
= 10.0V to 15.0V
= 10.0V
= 15V (Switch Off)
= 2.0A
= 100 mA
Conditions
LOAD
= 18.0V
= 0.
= 0.
= 600 mA
3
Typical
Typical
±
15.0
2.90
12.5
7.5
20
20
80
25
2.4
0.3
5.0
0.5
4.5
95
10
200
(Continued)
(Notes 3, 4)
14.50/14.25
15.50/15.75
LM1577-15
(Notes 3, 4)
10.0/14.0
LM1577-12
±
±
50/100
50/100
0.40/0.55
300/
300/600
50/85
Limit
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
93/90
Limit
±
±
400
90
14.50/14.25
15.50/15.75
LM2577-15
LM2577-12
±
10.0/14.0
(Note 5)
±
0.40/0.55
50/100
50/100
300/
(Note 5)
300/600
50/85
Limit
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
93/90
Limit
±
±
400
90
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mV(max)
mV(max)
mA(max)
mA(max)
µA(max)
µA(max)
µA(max)
(Limits)
(Limits)
µA(min)
µA(min)
V(max)
V(max)
%(min)
V(max)
A(max)
V(min)
V(min)
A(min)
Units
Units
mV
mV
mA
mA
A/V
µA
µA
µA
%
%
V
V
V
V
V
A