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參數資料
| 型號： | MC33375ST-3.3T3 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | LOW DROPOUT MICROPOWER VOLTAGE REGULATOR |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PDSO4 |
| 封裝： | TO-261, SOT-223, 4 PIN |
| 文件頁數： | 9/12頁 |
| 文件大小： | 213K |
| 代理商： | MC33375ST-3.3T3 |
MC33375
http://onsemi.com
9
THERMAL PROTECTION
Internal thermal limiting circuitry is provided to protect
the integrated circuit in the event that the maximum junction
temperature is exceeded. When activated, typically at
150
°
C, the output is disabled. There is no hysteresis built
into the thermal protection. As a result the output will appear
to be oscillating during thermal limit. The output will turn
off until the temperature drops below the 150
°
C then the
output turns on again. The process will repeat if the junction
increases above the threshold. This will continue until the
existing conditions allow the junction to operate below the
temperature threshold.
Thermal limit is not a substitute for proper
heatsinking.
The internal current limit will typically limit current to
450 mA. If during current limit the junction exceeds 150
°
C,
the thermal protection will protect the device also.
Current
limit is not a substitute for proper heatsinking.
OUTPUT NOISE
In many applications it is desirable to reduce the noise
present at the output. Reducing the regulator bandwidth by
increasing the size of the output capacitor will reduce the
noise on the MC33375.
ON/OFF PIN
When this pin is pulled low, the MC33375 is off. This pin
should not be left floating. The pin should be pulled high for
the MC33375 to operate.
Figure 24. SOT–223 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
R
θ
,
J
J
°
40
80
120
160
200
280
0.35
0.42
0.50
0.63
0.83
2.50
0
10
20
30
25
15
5.0
L, LENGTH OF COPPER (mm
P
D(max)
for T
A
= 50
°
C
Mnimum
Size Pad
2.0 oz. Copper
L
L
Free Air
Mounted
Vertically
PD
R
θ
JA
240
1.25
Figure 25. SOP–8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
170
R
θ
,
J
J
°
30
50
70
90
110
0.4
0.8
1.2
1.6
3.2
0
20
40
50
30
10
L, LENGTH OF COPPER (mm
P
D(max)
for T
A
= 50
°
C
L
L
R
θ
JA
130
2.0
150
2.4
2.8
Graph Represents Symmetrical Layout
Copper
3.0 mm
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| MC33375ST-5.0T3G | 功能描述:低壓差穩壓器 - LDO 5.0V 300mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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| MC33385VW | 功能描述:功率驅動器IC QUID+OSINE FUNCTION RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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