LM2576S-3.3 National Semiconductor, LM2576S-3.3 Datasheet - Page 5

• Manufacturer Part Number: LM2576S-3.3
• Description: IC, STEP-DOWN VOLTAGE REGULATOR, TO-263
• Manufacturer: National Semiconductor

Specifications of LM2576S-3.3

• Primary Input Voltage: 12V
• No. Of Outputs: 1
• Output Voltage: 3.3V
• Output Current: 3A
• No. Of Pins: 5
• Operating Temperature Range: -40°C To +125°C
• Supply Voltage Range: 4V To 40V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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