LM2577S-12 National Semiconductor, LM2577S-12 Datasheet - Page 6

• Manufacturer Part Number: LM2577S-12
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,BIPOLAR,SIP,5PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LM2577S-12

• Rohs Compliant: NO

www.national.com
DEVICE PARAMETERS
I
V
f
V
R
G
A
I
D
I
V
S
O
SS
L
UV
REF
FB
VOL
SAT
M
Electrical Characteristics—LM1577-15, LM2577-15
Specifications with standard type face are for T
Range. Unless otherwise specified, V
Symbol
Input Supply Current
Input Supply
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
Parameter
IN
= 5V, and I
V
(Switch Off)
I
V
(Max Duty Cycle)
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)
SWITCH
SWITCH
SWITCH
COMP
SWITCH
SWITCH
FEEDBACK
COMP
IN
COMP
IN
COMP
COMP
FEEDBACK
FEEDBACK
FEEDBACK
COMP
FEEDBACK
COMP
COMP
SWITCH
FEEDBACK
COMP
COMP
= 3.5V to 40V
= 3.5V to 40V
J
= 25˚C, and those in bold type face apply over full Operating Temperature
= −30 µA to +30 µA
= 2.0V
= 1.0V
= 1.0V
= 1.1V to 1.9V
= 1.0V
= 0V
= 1.5V
= 2.0V
= 1.0 MΩ
= 2.0A
= 100 mA
= 100 mA
= 100 mA
= 2.0A
SWITCH
= 65V
Conditions
= 18.0V
= 12.0V
= 18.0V
= 12.0V to 18.0V
= 12.0V
= 18.0V
= 0.
6
Typical
±
2.90
12.2
12.5
300
7.5
2.4
0.3
5.0
0.5
25
52
15
10
65
95
10
200
(Continued)
(Notes 3, 4)
14.70/14.55
15.30/15.45
LM1577-15
±
±
10.0/14.0
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
50/85
48/42
56/62
40/20
93/90
Limit
±
±
400
90
14.70/14.55
15.30/15.45
LM2577-15
±
±
10.0/14.0
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
50/85
48/42
56/62
40/20
93/90
Limit
±
±
400
90
µmho(max)
µmho(min)
kHz(max)
mA(max)
mA(max)
kHz(min)
V/V(min)
µA(max)
µA(max)
µA(max)
(Limits)
µA(min)
µA(min)
V(max)
V(max)
V(max)
V(max)
%(min)
V(min)
V(min)
V(min)
Units
µmho
kHz
mA
mA
mV
V/V
A/V
kΩ
µA
µA
µA
%
V
V
V
V
V