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| 型号： | LM2574DW-ADJR2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 3/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.5A 16SOICW |
| 产品变化通告： | LTB Notification 03/Jan/2008 |
| 标准包装： | 1,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 37 V |
| 输入电压： | 4.75 V ~ 40 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 52kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-SOIC W |
LM2574, NCV2574
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
T J
V in
Value
?40 to +125
40
Unit
° C
V
SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 16)
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, V in = 12 V for the 3.3 V, 5.0 V, and Adjustable
version, V in = 25 V for the 12 V version, V in = 30 V for the 15 V version. I Load = 100 mA. For typical values T J = 25 ° C, for min/max values
T J 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 (V in = 12 V, I Load = 100 mA, T J = 25 ° C)
Output Voltage (4.75 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A)
T J = 25 ° C
T J = ?40 to +125 ° C
Efficiency (V in = 12 V, I Load = 0.5 A)
V out
V out
η
3.234
3.168
3.135
?
3.3
3.3
?
72
3.366
3.432
3.465
?
V
V
%
LM2574?5 ([Note 1] Test Circuit Figure 16)
Output Voltage (V in = 12 V, I Load = 100 mA, T J = 25 ° C)
V out
4.9
5.0
5.1
V
Output Voltage (7.0 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A)
V out
V
T J = 25 ° C
T J = ?40 to +125 ° C
4.8
4.75
5.0
5.2
5.25
Efficiency (V in = 12 V, I Load = 0.5 A)
η
?
77
?
%
LM2574?12 ([Note 1] Test Circuit Figure 16)
Output Voltage (V in = 25 V, I Load = 100 mA, T J = 25 ° C)
V out
11.76
10
12.24
V
Output Voltage (15 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A)
V out
V
T J = 25 ° C
T J = ?40 to +125 ° C
11.52
11.4
12
?
12.48
12.6
Efficiency (V in = 15 V, I Load = 0.5 A)
η
?
88
?
%
LM2574?15 ([Note 1] Test Circuit Figure 16)
Output Voltage (V in = 30 V, I Load = 100 mA, T J = 25 ° C)
Output Voltage (18 V < V in < 40 V, 0.1 A < I Load < 0.5 A)
T J = 25 ° C
T J = ?40 to +125 ° C
Efficiency (V in = 18 V, I Load = 0.5 A)
V out
V out
η
14.7
14.4
14.25
?
15
15
88
15.3
15.6
15.75
?
V
V
%
LM2574 ADJUSTABLE VERSION ([Note 1] Test Circuit Figure 16)
Feedback Voltage V in = 12 V, I Load = 100 mA, V out = 5.0 V, T J = 25 ° C
V FB
1.217
1.23
1.243
V
Feedback Voltage 7.0 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A, V out = 5.0
V
V FBT
V
T J = 25 ° C
T J = ?40 to +125 ° C
1.193
1.18
1.23
1.267
1.28
Efficiency (V in = 12 V, I Load = 0.5 A, V out = 5.0 V)
η
?
77
?
%
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, NCV2574: T low = ?40 ° C T high = +125 ° C.
http://onsemi.com
3
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