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参数资料
| 型号： | LM2575D2T-ADJR4G |
| 厂商： | ON Semiconductor |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1A D2PAK |
| 标准包装： | 1 |
| 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： | 1A |
| 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： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 包装： | 标准包装 |
| 供应商设备封装： | D2PAK-5 |
| 其它名称： | LM2575D2T-ADJR4GOSDKR |
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LM2575, NCV2575
DEVICE PARAMETERS
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, and V in = 30 V for the 15 V version. I Load = 200 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.)
Characteristics
Symbol
Min
Typ
Max
Unit
ALL OUTPUT VOLTAGE VERSIONS
Feedback Bias Current (V out = 5.0 V Adjustable Version Only)
T J = 25 ° C
T J = ? 40 to +125 ° C
Oscillator Frequency Note 3
T J = 25 ° C
T J = 0 to +125 ° C
T J = ? 40 to +125 ° C
Saturation Voltage (I out = 1.0 A Note 4)
T J = 25 ° C
T J = ? 40 to +125 ° C
Max Duty Cycle (“on”) Note 5
Current Limit (Peak Current Notes 4 and 3)
T J = 25 ° C
T J = ? 40 to +125 ° C
Output Leakage Current Notes 6 and 7, T J = 25 ° C
Output = 0 V
Output = ? 1.0 V
Quiescent Current Note 6
T J = 25 ° C
T J = ? 40 to +125 ° C
Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”))
T J = 25 ° C
T J = ? 40 to +125 ° C
I b
f osc
V sat
DC
I CL
I L
I Q
I stby
?
?
?
47
42
?
?
94
1.7
1.4
?
?
?
?
15
?
25
?
52
?
?
1.0
?
98
2.3
?
0.8
6.0
5.0
?
80
?
100
200
?
58
63
1.2
1.3
?
3.0
3.2
2.0
20
9.0
11
200
400
nA
kHz
V
%
A
mA
mA
m A
ON/OFF Pin Logic Input Level (Test Circuit Figure 14)
V
V out = 0 V
T J = 25 ° C
T J = ? 40 to +125 ° C
V out = Nominal Output Voltage
T J = 25 ° C
T J = ? 40 to +125 ° C
V IH
V IL
2.2
2.4
?
?
1.4
?
1.2
?
?
?
1.0
0.8
ON/OFF Pin Input Current (Test Circuit Figure 14)
ON/OFF Pin = 5.0 V (“off”), T J = 25 ° C
ON/OFF Pin = 0 V (“on”), T J = 25 ° C
I IH
I IL
?
?
15
0
30
5.0
m A
3. The oscillator frequency reduces to approximately 18 kHz in the event of an output short or an overload which causes the regulated output
voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the average dissipation of the IC by
lowering the minimum duty cycle from 5% down to approximately 2%.
4. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to output pin.
5. Feedback (Pin 4) removed from output and connected to 0 V.
6. Feedback (Pin 4) removed from output and connected to +12 V for the Adjustable, 3.3 V, and 5.0 V versions, and +25 V for the 12 V and
15 V versions, to force the output transistor “off”.
7. V in = 40 V.
http://onsemi.com
4
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