LM1575/LM2575/LM2575HV
LM1575-ADJ, LM2575-ADJ, LM2575HV-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
LM1575-ADJ
Limit
(Note 2)
SYSTEM PARAMETERS
(Note 4) Test Circuit
V
OUT
Feedback Voltage
V
IN
= 12V, I
LOAD
= 0.2A
V
OUT
= 5V
Circuit of
V
OUT
Feedback Voltage
LM1575/LM2575
V
OUT
Feedback Voltage
LM2575HV
η
Efficiency
0.2A
≤
I
LOAD
≤
1A,
8V
≤
V
IN
≤
40V
V
OUT
= 5V, Circuit of
0.2A
≤
I
LOAD
≤
1A,
8V
≤
V
IN
≤
60V
V
OUT
= 5V, Circuit of
V
IN
= 12V, I
LOAD
= 1A, V
OUT
= 5V
77
1.230
1.205/1.193
1.261/1.273
1.193/1.180
1.273/1.286
1.230
1.205/1.193
1.255/1.267
1.193/1.180
1.267/1.280
1.230
1.217
1.243
1.217
1.243
V
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
%
LM2575-ADJ
LM2575HV-ADJ
Limit
(Note 3)
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
= 200 mA.
Symbol
Parameter
Conditions
Typ
LM1575-XX
Limit
(Note 2)
DEVICE PARAMETERS
I
b
f
O
Feedback Bias Current
Oscillator Frequency
V
OUT
= 5V (Adjustable Version Only)
(Note 13)
50
52
47/43
58/62
V
SAT
DC
I
CL
Saturation Voltage
Max Duty Cycle (ON)
Current Limit
I
OUT
= 1A (Note 5)
(Note 6)
Peak Current (Notes 5, 13)
0.9
1.2/1.4
98
93
2.2
1.7/1.3
3.0/3.2
I
L
Output Leakage
Current
I
Q
I
STBY
Quiescent Current
Standby Quiescent
Current
1.7/1.3
3.0/3.2
2
30
10
200
93
1.2/1.4
47/42
58/63
100/500
100/500
nA
kHz
kHz(Min)
kHz(Max)
V
V(Max)
%
%(Min)
A
A(Min)
A(Max)
mA(Max)
mA
30
5
10/12
ON /OFF Pin = 5V (OFF)
50
200/500
mA(Max)
mA
mA(Max)
μA
μA(Max)
LM2575-XX
LM2575HV-XX
Limit
(Note 3)
Units
(Limits)
Output = 0V
Output = −1V
Output = −1V
(Notes 7, 8)
(Note 7)
2
7.5
7
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
