LM2576/LM2576HV
LM2576-ADJ, LM2576HV-ADJ
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
boldface type
apply over full Operating Temperature
Range.
Symbol
Parameter
Conditions
Typ
SYSTEM PARAMETERS
Test Circuit
V
OUT
Feedback Voltage
V
IN
= 12V, I
LOAD
= 0.5A
V
OUT
= 5V,
Circuit of
V
OUT
Feedback Voltage
LM2576
V
OUT
Feedback Voltage
LM2576HV
η
Efficiency
0.5A
≤
I
LOAD
≤
3A,
8V
≤
V
IN
≤
40V
V
OUT
= 5V, Circuit of
0.5A
≤
I
LOAD
≤
3A,
8V
≤
V
IN
≤
60V
V
OUT
= 5V, Circuit of
V
IN
= 12V, I
LOAD
= 3A, V
OUT
= 5V
77
1.230
1.193/1.180
1.273/1.286
1.230
1.193/1.180
1.267/1.280
1.230
1.217
1.243
V
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
%
LM2576-ADJ
LM2576HV-ADJ
Limit
Units
(Limits)
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
boldface type
apply over full Operating Temperature
Range. Unless otherwise specified, V
IN
= 12V for the 3.3V, 5V, and Adjustable version, V
IN
= 25V for the 12V version, and V
IN
= 30V for the 15V version. I
LOAD
= 500 mA.
Symbol
Parameter
Conditions
LM2576-XX
LM2576HV-XX
Typ
DEVICE PARAMETERS
I
b
f
O
Feedback Bias Current
Oscillator Frequency
V
OUT
= 5V (Adjustable Version Only)
50
52
47/42
58/63
V
SAT
DC
I
CL
Saturation Voltage
Max Duty Cycle (ON)
Current Limit
I
OUT
= 3A (Note 4)
(Notes 4, 11)
1.4
1.8/2.0
98
93
5.8
4.2/3.5
6.9/7.5
I
L
Output Leakage Current
(Notes 6, 7):
Output = 0V
Output = −1V
Output = −1V
I
Q
I
STBY
Quiescent Current
Standby Quiescent
Current
ON /OFF Pin = 5V (OFF)
5
10
50
200
7.5
30
2
100/500
nA
kHz
kHz
(Min)
kHz
(Max)
V
V(Max)
%
%(Min)
A
A(Min)
A(Max)
mA(Max)
mA
mA(Max)
mA
mA(Max)
µA
µA(Max)
Limit
Units
(Limits)
5
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