LM2576H National Semiconductor, LM2576H Datasheet - Page 5

• Manufacturer Part Number: LM2576H
• Description: SIMPLE SWITCHER 3A Step-Down Voltage Regulator
• Manufacturer: National Semiconductor

SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2
V
V
Symbol
DEVICE PARAMETERS
I
f
V
DC
I
I
I
I
b
O
CL
L
Q
STBY
Symbol
LM2576-ADJ, LM2576HV-ADJ
Electrical Characteristics
All Output Voltage Versions
Electrical Characteristics
JA
JA
JC
JA
Specifications with standard type face are for T
Range.
Specifications with standard type face are for T
Range. Unless otherwise specified, V
V
OUT
OUT
SAT
IN
= 30V for the 15V version. I
Feedback Bias Current
Oscillator Frequency
Saturation Voltage
Max Duty Cycle (ON)
Current Limit
Output Leakage Current
Quiescent Current
Standby Quiescent
Current
Thermal Resistance
Efficiency
Feedback Voltage
LM2576
Feedback Voltage
LM2576HV
Parameter
Parameter
LOAD
IN
= 500 mA.
= 12V for the 3.3V, 5V, and Adjustable version, V
0.5A
8V
V
0.5A
8V
V
V
OUT
OUT
IN
V
(Note 11)
I
(Note 5)
(Notes 4, 11)
(Notes 6, 7): Output = 0V
(Note 6)
ON /OFF Pin = 5V (OFF)
T Package, Junction to Ambient (Note 8)
T Package, Junction to Ambient (Note 9)
T Package, Junction to Case
S Package, Junction to Ambient (Note 10)
(Continued)
OUT
OUT
= 12V, I
V
V
= 5V, Circuit of Figure 2
= 5V, Circuit of Figure 2
J
J
IN
IN
I
I
= 3A (Note 4)
LOAD
LOAD
= 5V (Adjustable Version Only)
= 25˚C, and those with boldface type apply over full Operating Temperature
= 25˚C, and those with boldface type apply over full Operating Temperature
40V
60V
LOAD
Conditions
3A,
3A,
= 3A, V
Conditions
5
OUT
= 5V
Output = −1V
Output = −1V
1.230
1.230
Typ
77
IN
LM2576HV-ADJ
= 25V for the 12V version, and
LM2576-ADJ
Typ
1.4
5.8
7.5
50
52
98
50
65
45
50
5
2
LM2576HV-XX
LM2576-XX
1.193/1.180
1.267/1.280
1.193/1.180
1.273/1.286
(Note 2)
Limit
(Note 2)
100/500
1.8/2.0
4.2/3.5
6.9/7.5
Limit
47/42
58/63
200
93
30
10
2
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(Limits)
mA(Max)
mA(Max)
mA(Max)
V(Max)
V(Max)
V(Min)
V(Min)
µA(Max)
(Limits)
Units
V(Max)
A(Max)
%(Min)
A(Min)
Units
(Max)
%
(Min)
˚C/W
V
V
kHz
kHz
kHz
mA
mA
nA
µA
%
V
A