LM2576
OPERATING RATINGS
(Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed
specifications and test conditions, see the Electrical Characteristics.)
Rating
Operating Junction Temperature Range
Supply Voltage
Symbol
TJ
Vin
Value
–40 to +125
40
Unit
°C
V
SYSTEM PARAMETERS
([Note 1] Test Circuit Figure 15)
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin = 25 V for
the 12 V version, and Vin = 30 V for the 15 V version. ILoad = 500 mA. For typical values TJ = 25°C, for min/max values TJ is the operating
junction temperature range that applies [Note 2], unless otherwise noted.)
Characteristics
LM2576–3.3
([Note 1] Test Circuit Figure 15)
Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25°C)
Output Voltage (6.0 V
≤
Vin
≤
40 V, 0.5 A
≤
ILoad
≤
3.0 A)
TJ = 25°C
TJ = –40 to +125°C
Efficiency (Vin = 12 V, ILoad = 3.0 A)
LM2576–5
([Note 1] Test Circuit Figure 15)
Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25°C)
Output Voltage (8.0 V
≤
Vin
≤
40 V, 0.5 A
≤
ILoad
≤
3.0 A)
TJ = 25°C
TJ = –40 to +125°C
Efficiency (Vin = 12 V, ILoad = 3.0 A)
LM2576–12
([Note 1] Test Circuit Figure 15)
Output Voltage (Vin = 25 V, ILoad = 0.5 A, TJ = 25°C)
Output Voltage (15 V
≤
Vin
≤
40 V, 0.5 A
≤
ILoad
≤
3.0 A)
TJ = 25°C
TJ = –40 to +125°C
Efficiency (Vin = 15 V, ILoad = 3.0 A)
LM2576–15
([Note 1] Test Circuit Figure 15)
Output Voltage (Vin = 30 V, ILoad = 0.5 A, TJ = 25°C)
Output Voltage (18 V
≤
Vin
≤
40 V, 0.5 A
≤
ILoad
≤
3.0 A)
TJ = 25°C
TJ = –40 to +125°C
Efficiency (Vin = 18 V, ILoad = 3.0 A)
LM2576 ADJUSTABLE VERSION
([Note 1] Test Circuit Figure 15)
Feedback Voltage (Vin = 12 V, ILoad = 0.5 A, Vout = 5.0 V, TJ = 25°C)
Feedback Voltage (8.0 V
≤
Vin
≤
40 V, 0.5 A
≤
ILoad
≤
3.0 A, Vout = 5.0 V)
TJ = 25°C
TJ = –40 to +125°C
Efficiency (Vin = 12 V, ILoad = 3.0 A, Vout = 5.0 V)
Vout
Vout
1.193
1.18
η
–
1.23
–
77
1.267
1.28
–
%
1.217
1.23
1.243
V
V
Vout
Vout
14.4
14.25
η
–
15
–
88
15.6
15.75
–
%
14.7
15
15.3
V
V
Vout
Vout
11.52
11.4
η
–
12
–
88
12.48
12.6
–
%
11.76
12
12.24
V
V
Vout
Vout
4.8
4.75
η
–
5.0
–
77
5.2
5.25
–
%
4.9
5.0
5.1
V
V
Vout
Vout
3.168
3.135
η
–
3.3
–
75
3.432
3.465
–
%
3.234
3.3
3.366
V
V
Symbol
Min
Typ
Max
Unit
NOTES:
1. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the
LM2576 is used as shown in the Figure 15 test circuit, system performance will be as shown in system parameters section.
2. Tested junction temperature range for the LM2576:
Tlow = –40°C
Thigh = +125°C
MOTOROLA ANALOG IC DEVICE DATA
3
MOTOROLA [ MOTOROLA, INC ]
