lm2577sx-adj National Semiconductor Corporation, lm2577sx-adj Datasheet - Page 5

• Manufacturer Part Number: lm2577sx-adj
• Description: Simple Switcher Step-up Voltage Regulator
• Manufacturer: National Semiconductor Corporation

DEVICE PARAMETERS
A
I
D
I
V
SYSTEM PARAMETERS Circuit of Figure 2 (Note 6)
V
η
SS
L
VOL
SAT
OUT
Electrical Characteristics—LM1577-12, LM2577-12
Specifications with standard type face are for T
Range. Unless otherwise specified, V
Electrical Characteristics—LM1577-15, LM2577-15
Specifications with standard type face are for T
Range. Unless otherwise specified, V
Symbol
Symbol
Error Amp
Voltage Gain
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
Parameter
Parameter
IN
IN
V
R
(Note 7)
Upper Limit
V
Lower Limit
V
V
V
V
V
V
I
V
V
I
V
SWITCH
SWITCH
= 5V, and I
= 5V, and I
COMP
FEEDBACK
FEEDBACK
FEEDBACK
COMP
FEEDBACK
COMP
COMP
SWITCH
FEEDBACK
COMP
COMP
V
I
(Note 3)
V
I
V
I
V
LOAD
LOAD
LOAD
IN
IN
IN
IN
= 1.1V to 1.9V
= 1.0V
= 0V
= 1.5V
= 2.0V (Max Duty Cycle)
= 5V to 12V
= 3.5V to 12V
= 5V
= 5V, I
= 1.0 MΩ
J
= 100 mA
= 2.0A
J
= 65V
= 100 mA to 600 mA
= 300 mA
= 100 mA to 600 mA
= 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
= 10.0V
= 15.0V
= 10.0V to 15.0V
= 10.0V
= 15V (Switch Off)
Conditions
SWITCH
SWITCH
Conditions
LOAD
= 600 mA
= 0.
= 0.
5
Typical
Typical
±
15.0
12.5
20
20
80
2.4
0.3
5.0
0.5
4.5
80
95
10
200
(Continued)
(Notes 3, 4)
14.50/14.25
15.50/15.75
LM1577-15
(Notes 3, 4)
LM1577-12
±
±
0.40/0.55
50/100
50/100
300/
300/600
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
Limit
50/25
93/90
±
±
400
90
14.50/14.25
15.50/15.75
LM2577-15
LM2577-12
±
(Note 5)
±
0.40/0.55
50/100
50/100
(Note 5)
300/
300/600
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
50/25
93/90
Limit
±
±
400
90
www.national.com
mV(max)
mV(max)
V/V(min)
(Limits)
µA(max)
µA(max)
µA(max)
(Limits)
µA(min)
µA(min)
V(max)
V(max)
%(min)
V(max)
A(max)
V(min)
V(min)
A(min)
Units
Units
mV
mV
V/V
A/V
µA
µA
µA
%
V
%
V
V
V
A