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LM2576 Fiches technique(PDF) 3 Page - Motorola, Inc

No de pièce LM2576
Description  Easy Switcher 3.0A Step-Down Voltage Regulator
Download  28 Pages
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Fabricant  MOTOROLA [Motorola, Inc]
Site Internet  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

LM2576 Fiches technique(HTML) 3 Page - Motorola, Inc

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LM2576
3
MOTOROLA ANALOG IC DEVICE DATA
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 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
Symbol
Min
Typ
Max
Unit
LM2576–3.3 ([Note 1] Test Circuit Figure 15)
Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25°C)
Vout
3.234
3.3
3.366
V
Output Voltage (6.0 V
≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)
Vout
V
TJ = 25°C
3.168
3.3
3.432
TJ = –40 to +125°C
3.135
3.465
Efficiency (Vin = 12 V, ILoad = 3.0 A)
η
75
%
LM2576–5 ([Note 1] Test Circuit Figure 15)
Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25°C)
Vout
4.9
5.0
5.1
V
Output Voltage (8.0 V
≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)
Vout
V
TJ = 25°C
4.8
5.0
5.2
TJ = –40 to +125°C
4.75
5.25
Efficiency (Vin = 12 V, ILoad = 3.0 A)
η
77
%
LM2576–12 ([Note 1] Test Circuit Figure 15)
Output Voltage (Vin = 25 V, ILoad = 0.5 A, TJ = 25°C)
Vout
11.76
12
12.24
V
Output Voltage (15 V
≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)
Vout
V
TJ = 25°C
11.52
12
12.48
TJ = –40 to +125°C
11.4
12.6
Efficiency (Vin = 15 V, ILoad = 3.0 A)
η
88
%
LM2576–15 ([Note 1] Test Circuit Figure 15)
Output Voltage (Vin = 30 V, ILoad = 0.5 A, TJ = 25°C)
Vout
14.7
15
15.3
V
Output Voltage (18 V
≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A)
Vout
V
TJ = 25°C
14.4
15
15.6
TJ = –40 to +125°C
14.25
15.75
Efficiency (Vin = 18 V, ILoad = 3.0 A)
η
88
%
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)
Vout
1.217
1.23
1.243
V
Feedback Voltage (8.0 V
≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A, Vout = 5.0 V)
Vout
V
TJ = 25°C
1.193
1.23
1.267
TJ = –40 to +125°C
1.18
1.28
Efficiency (Vin = 12 V, ILoad = 3.0 A, Vout = 5.0 V)
η
77
%
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


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