3A, 52kHz, Step-Down Switching Regulator
LM2576
ELECTRICAL CHARACTERISTICS / SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 15)
(Unless otherwise specified, Vin = 12V for the 3.3V, 5.0V, and Adjustable version, Vin = 25V for the 12V 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
Symbol
Min
TYP
3.3
Max
Unit
LM2576-3.3V ([Note 1] Test Circuit Figure 2)
Output Voltage (Vin = 12V, ILOAD=0.5A, TJ=25℃)
Output Voltage (6.0V≤Vin≤40V, 0.5A≤ILOAD≤3.0A
TJ=25℃
Vout
Vout
η
3.234
3.366
V
V
3.168
3.135
-
3.3
-
3.432
3.465
-
TJ= -40℃ ~ +125℃
Efficiency (Vin=12V, ILOAD=3.0A)
75
%
LM2576-5.0V ([Note 1] Test Circuit Figure 2)
Output Voltage (Vin = 12V, ILOAD=0.5A, TJ=25℃)
Output Voltage (8.0V≤Vin≤40V, 0.5A≤ILOAD≤3.0A
TJ=25℃
Vout
Vout
η
4.9
5.0
5.1
V
V
4.8
4.75
-
5.0
-
5.2
5.25
-
TJ= -40℃ ~ +125℃
Efficiency (Vin=12V, ILOAD=3.0A)
77
%
LM2576-12V ([Note 1] Test Circuit Figure 2)
Output Voltage (Vin = 25V, ILOAD=0.5A, TJ=25℃)
Output Voltage (15V≤Vin≤40V, 0.5A≤ILOAD≤3.0A
TJ=25℃
Vout
Vout
η
11.76
12
12.24
V
V
11.52
11.4
-
12
-
12.48
12.6
-
TJ= -40℃ ~ +125℃
Efficiency (Vin=25V, ILOAD=3.0A)
88
%
LM2576-ADJ ([Note 1] Test Circuit Figure 2)
Feedback Voltage (Vin=12V, ILOAD=0.5A, TJ=25℃)
Feedback Voltage (8.0V≤Vin≤40V, 0.5A≤ILOAD≤3.0A, Vout=5.0V)
TJ=25℃
Vout
Vout
η
1.217
1.23
1.243
V
V
1.193
1.18
-
1.23
-
1.267
1.28
-
TJ= -40℃ ~ +125℃
Efficiency (Vin=12V, ILOAD=3.0A, Vout=5.0V)
77
%
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
Dec 2011 – Rev. 1.3
- 6 -
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
