LM2575 查看數據表（PDF） - HTC Korea
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LM2575 Datasheet PDF : 13 Pages
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1A, 52kHz, Step-Down Switching Regulator
LM2575
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, see the Electrical Characteristics.)
Rating
Symbol
Value
Unit
Operating Junction Temperature Range
TJ
-40 to +125
℃
Supply Voltage
Vin
40
V
ELECTRICAL CHARACTERISTICS / SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 15)
(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
Symbol Min
TYP
Max Unit
LM2575-3.3V ([Note 1] Test Circuit Figure 2)
Output Voltage (Vin = 12V, ILOAD=0.5A, TJ=25℃)
Vout 3.234 3.3 3.366 V
Output Voltage (6.0V≤Vin≤40V, 0.5A≤ILOAD≤1A
TJ=25℃
Vout 3.168 3.3 3.432 V
TJ= -40℃ ~ +125℃
Efficiency (Vin=12V, ILOAD=1A)
3.135 - 3.465
η
-
75
-
%
LM2575-5.0V ([Note 1] Test Circuit Figure 2)
Output Voltage (Vin = 12V, ILOAD=0.5A, TJ=25℃)
Output Voltage (8.0V≤Vin≤40V, 0.5A≤ILOAD≤1A
TJ=25℃
TJ= -40℃ ~ +125℃
Efficiency (Vin=12V, ILOAD=1A)
Vout 4.9 5.0
Vout 4.8 5.0
4.75
-
η
-
77
5.1 V
5.2 V
5.25
-
%
LM2575-12V ([Note 1] Test Circuit Figure 2)
Output Voltage (Vin = 25V, ILOAD=0.5A, TJ=25℃)
Output Voltage (15V≤Vin≤40V, 0.5A≤ILOAD≤1A
TJ=25℃
TJ= -40℃ ~ +125℃
Efficiency (Vin=12V, ILOAD=1A)
Vout 11.76 12 12.24 V
Vout 11.52 12 12.48 V
11.4
-
12.6
η
-
88
-
%
LM2575-ADJ ([Note 1] Test Circuit Figure 2)
Feedback Voltage (Vin=12V, ILOAD=0.5A, TJ=25℃)
Vout 1.217 1.23 1.243 V
Feedback Voltage(8.0V≤Vin≤40V, 0.5A≤ILOAD≤1A, Vout=5.0V)
TJ=25℃
Vout 1.193 1.23 1.267 V
TJ= -40℃ ~ +125℃
Efficiency (Vin=12V, ILOAD=1A, Vout=5.0V)
1.18
-
1.28
η
-
77
-
%
1. External components such as the catch diode, inductor, input and output capacitors can affect
switching regulator system performance.
When the LM2575 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 LM2575: Tlow = –40°C Thigh = +125°C
−3−
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