lm2577sx-adj

Manufacturer Part Numberlm2577sx-adj
DescriptionSimple Switcher Step-up Voltage Regulator
ManufacturerNational Semiconductor Corporation
lm2577sx-adj datasheet
 
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Electrical Characteristics—LM1577-15, LM2577-15
Specifications with standard type face are for T
Range. Unless otherwise specified, V
Symbol
Parameter
DEVICE PARAMETERS
NPN Switch
Current Limit
Electrical Characteristics—LM1577-ADJ, LM2577-ADJ
Specifications with standard type face are for T
Range. Unless otherwise specified, V
Symbol
Parameter
SYSTEM PARAMETERS Circuit of Figure 3 (Note 6)
V
Output Voltage
OUT
∆V
/
Line Regulation
OUT
∆V
IN
∆V
/
Load Regulation
OUT
∆I
LOAD
η
Efficiency
DEVICE PARAMETERS
I
Input Supply Current
S
V
Input Supply
UV
Undervoltage Lockout
f
Oscillator Frequency
O
V
Reference
REF
Voltage
∆V
/
Reference Voltage
REF
∆V
Line Regulation
IN
I
Error Amp
B
Input Bias Current
G
Error Amp
M
Transconductance
A
Error Amp
VOL
Voltage Gain
= 25˚C, and those in bold type face apply over full Operating Temperature
J
= 5V, and I
= 0.
IN
SWITCH
Conditions
V
= 2.0V
COMP
= 25˚C, and those in bold type face apply over full Operating Temperature
J
= 5V, V
= V
, and I
IN
FEEDBACK
REF
SWITCH
Conditions
Typical
V
= 5V to 10V
IN
I
= 100 mA to 800 mA
LOAD
(Note 3)
V
= 3.5V to 10V
IN
I
= 300 mA
LOAD
V
= 5V
IN
I
= 100 mA to 800 mA
LOAD
V
= 5V, I
= 800 mA
IN
LOAD
V
= 1.5V (Switch Off)
FEEDBACK
I
= 2.0A
SWITCH
V
= 2.0V (Max Duty Cycle)
COMP
I
= 100 mA
SWITCH
Measured at Switch Pin
I
= 100 mA
SWITCH
Measured at Feedback Pin
V
= 3.5V to 40V
IN
V
= 1.0V
COMP
V
= 3.5V to 40V
IN
V
= 1.0V
COMP
I
= −30 µA to +30 µA
COMP
V
= 1.0V
COMP
V
= 1.1V to 1.9V
COMP
R
= 1.0 MΩ (Note 7)
COMP
7
(Continued)
LM1577-15
LM2577-15
Typical
Limit
Limit
(Notes 3, 4)
(Note 5)
4.3
3.7/3.0
3.7/3.0
5.3/6.0
5.3/6.0
= 0.
LM1577-ADJ LM2577-ADJ
Limit
Limit
(Notes 3, 4)
(Note 5)
12.0
11.60/11.40
11.60/11.40
12.40/12.60
12.40/12.60
20
50/100
50/100
20
50/100
50/100
80
7.5
10.0/14.0
10.0/14.0
25
50/85
50/85
2.90
2.70/2.65
2.70/2.65
3.10/3.15
3.10/3.15
52
48/42
48/42
56/62
56/62
1.230
1.214/1.206
1.214/1.206
1.246/1.254
1.246/1.254
0.5
100
300/800
300/800
3700
2400/1600
2400/1600
4800/5800
4800/5800
800
500/250
500/250
Units
(Limits)
A
A(min)
A(max)
Units
(Limits)
V
V(min)
V(max)
mV
mV(max)
mV
mV(max)
%
mA
mA(max)
mA
mA(max)
V
V(min)
V(max)
kHz
kHz(min)
kHz(max)
V
V(min)
V(max)
mV
nA
nA(max)
µmho
µmho(min)
µmho(max)
V/V
V/V(min)
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