LM2574 데이터 시트보기 (PDF) - Motorola => Freescale
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LM2574 Datasheet PDF : 24 Pages
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LM2574
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
Symbol
Value
Unit
Operating Junction Temperature Range
TJ
–40 to +125 °C
Supply Voltage
Vin
40
V
SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 16)
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, Vin = 30 V for the 15 V version. ILoad = 100 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).
Characteristic
Symbol
Min
Typ
Max
Unit
LM2574–3.3 ([Note 1] Test Circuit Figure 16)
Output Voltage (Vin = 12 V, ILoad = 100 mA, TJ = 25°C)
Vout
3.234
3.3
3.366
V
Output Voltage (4.75 V ≤ Vin ≤ 40 V, 0.1 A ≤ ILoad ≤ 0.5 A)
TJ = 25°C
TJ = –40 to +125°C
Efficiency (Vin = 12 V, ILoad = 0.5 A)
Vout
η
V
3.168
3.3
3.432
3.135
–
3.465
–
72
–
%
LM2574–5 ([Note 1] Test Circuit Figure 16)
Output Voltage (Vin = 12 V, ILoad = 100 mA, TJ = 25°C)
Vout
4.9
5.0
5.1
V
Output Voltage (7.0 V ≤ Vin ≤ 40 V, 0.1 A ≤ ILoad ≤ 0.5 A)
TJ = 25°C
TJ = –40 to +125°C
Vout
V
4.8
5.0
5.2
4.75
5.25
Efficiency (Vin = 12 V, ILoad = 0.5 A)
η
–
77
–
%
LM2574–12 ([Note 1] Test Circuit Figure 16)
Output Voltage (Vin = 25 V, ILoad = 100 mA, TJ = 25°C)
Vout
11.76
10
12.24
V
Output Voltage (15 V ≤ Vin ≤ 40 V, 0.1 A ≤ ILoad ≤ 0.5 A)
TJ = 25°C
TJ = –40 to +125°C
Vout
V
11.52
12
12.48
11.4
–
12.6
Efficiency (Vin = 15 V, ILoad = 0.5 A)
η
–
88
–
%
LM2574–15 ([Note 1] Test Circuit Figure 16)
Output Voltage (Vin = 30 V, ILoad = 100 mA, TJ = 25°C)
Vout
14.7
15
15.3
V
Output Voltage (18 V < Vin < 40 V, 0.1 A < ILoad < 0.5 A)
TJ = 25°C
TJ = –40 to +125°C
Efficiency (Vin = 18 V, ILoad = 0.5 A)
Vout
η
V
14.4
15
15.6
14.25
15.75
–
88
–
%
LM2574 ADJUSTABLE VERSION ([Note 1] Test Circuit Figure 16)
Feedback Voltage Vin = 12 V, ILoad = 100 mA, Vout = 5.0 V, TJ = 25°C
VFB
1.217
1.23
1.243
V
Feedback Voltage 7.0 V ≤ Vin ≤ 40 V, 0.1 A ≤ ILoad ≤ 0.5 A, Vout = 5.0 V
TJ = 25°C
TJ = –40 to +125°C
Efficiency (Vin = 12 V, ILoad = 0.5 A, Vout = 5.0 V)
VFBT
η
V
1.193
1.23
1.267
1.18
1.28
–
77
–
%
NOTES: 1. External components such as the catch diode, inductor, input and output capacitors can affect the switching regulator system
performance. When the LM2574 is used as shown in the Figure 16 test circuit, the system performance will be as
shown in the system parameters section of the Electrical Characteristics.
2. Tested junction temperature range for the LM2574: Tlow = –40°C Thigh = +125°C
MOTOROLA ANALOG IC DEVICE DATA
3
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