LM2577N-12 National Semiconductor, LM2577N-12 Datasheet - Page 5

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

SYSTEM PARAMETERS Circuit of Figure 3 (Note 6)
V
DEVICE PARAMETERS
I
V
f
V
I
G
A
I
D
S
O
B
SS
Specifications with standard type face are for T
Range. Unless otherwise specified, V
V
V
V
I
V
V
I
V
OUT
UV
REF
VOL
Symbol
M
Electrical Characteristics — LM1577-ADJ, LM2577-ADJ
LOAD
SWITCH
OUT
IN
OUT
REF
IN
COMP
/
/
/
/
Output Voltage
Line Regulation
Load Regulation
Efficiency
Input Supply Current
Input Supply
Undervoltage Lockout
Oscillator Frequency
Reference
Voltage
Reference Voltage
Line Regulation
Error Amp
Input Bias Current
Error Amp
Transconductance
Error Amp
Voltage Gain
Error Amplifier
Output Swing
Error Amp
Output Current
Soft Start Current
Maximum Duty Cycle
Switch
Transconductance
Parameter
IN
V
I
(Note 3)
V
I
V
I
V
V
I
V
I
Measured at Switch Pin
I
Measured at Feedback Pin
V
V
V
V
I
V
V
R
Upper Limit
V
Lower Limit
V
V
V
V
V
V
I
LOAD
LOAD
LOAD
SWITCH
SWITCH
SWITCH
COMP
SWITCH
IN
IN
IN
IN
FEEDBACK
COMP
IN
COMP
IN
COMP
COMP
COMP
FEEDBACK
FEEDBACK
FEEDBACK
COMP
FEEDBACK
COMP
COMP
COMP
= 5V, V
= 5V to 10V
= 3.5V to 10V
= 5V
= 5V, I
= 3.5V to 40V
= 3.5V to 40V
= 100 mA to 800 mA
= 300 mA
= 100 mA to 800 mA
= −30 µA to +30 µA
= 2.0V (Max Duty Cycle)
= 1.0V
= 1.0V
= 1.0V
= 1.1V to 1.9V
= 1.0 M
= 1.0V
= 0V
= 1.5V
= 2.0A
= 100 mA
= 100 mA
= 100 mA
J
FEEDBACK
= 25˚C, and those in bold type face apply over full Operating Temperature
LOAD
Conditions
= 1.5V (Switch Off)
= 1.0V
= 1.5V
= 1.0V to 1.5V
= 1.0V
= 800 mA
(Note 7)
= V
REF
5
, and I
SWITCH
Typical
1.230
3700
±
12.0
2.90
12.5
100
800
7.5
0.5
2.4
0.3
5.0
20
20
80
25
52
95
200
= 0.
LM1577-ADJ LM2577-ADJ
(Notes 3, 4)
11.60/11.40
12.40/12.60
1.214/1.206
1.246/1.254
±
2400/1600
4800/5800
±
10.0/14.0
2.70/2.65
3.10/3.15
0.40/0.55
300/800
500/250
300/
50/100
50/100
2.2/2.0
130/
2.5/1.5
7.5/9.5
50/85
48/42
56/62
93/90
Limit
±
±
400
90
11.60/11.40
12.40/12.60
1.214/1.206
1.246/1.254
±
2400/1600
4800/5800
±
10.0/14.0
2.70/2.65
3.10/3.15
0.40/0.55
(Note 5)
300/800
500/250
300/
50/100
50/100
2.2/2.0
130/
2.5/1.5
7.5/9.5
50/85
48/42
56/62
93/90
Limit
±
±
400
90
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µmho(max)
µmho(min)
kHz(max)
mV(max)
mV(max)
mA(max)
mA(max)
kHz(min)
nA(max)
V/V(min)
µA(max)
µA(max)
(Limits)
µA(min)
µA(min)
V(max)
V(max)
V(max)
V(max)
%(min)
V(min)
V(min)
V(min)
V(min)
Units
µmho
kHz
V/V
A/V
mV
mV
mA
mA
mV
nA
µA
µA
%
%
V
V
V
V
V