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參數(shù)資料
| 型號： | LM2574-3.3YN |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | LEAD FREE, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 187K |
| 代理商： | LM2574-3.3YN |
July 2005
3
M9999-072805
LM2574
Micrel, Inc.
Absolute Maximum Ratings(1)
Maximum Supply Voltage
LM2574...................................................................... 45V
OFF Pin Input Voltage ................................ –0.3V ≤ V ≤ VIN
Output Voltage to Ground (Steady State)...................... –1V
Power Dissipation..................................... Internally Limited
Storage Temperature Range (TS)............. –65°C to +150°C
Minimum ESD Rating
C = 100pF, R = 1.5kΩ................................................ 2kV
FB Pin........................................................................ 1kV
Lead Temperature (soldering, 10 sec.)...................... 260°C
Operating Ratings(1)
Supply Voltage
LM2574...................................................................... 40V
Temperature Range
LM2574...........................................–40°C ≤ TJ ≤ +125°C
Maximum Junction Temperature (TJ.......................... 150°C
Electrical Characteristics(2)
Specications with standard typeface are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range.
Unless otherwise specied, VIN = 12V, and ILOAD = 100mA.
Symbol
Parameter
Condition
Min
Typ
Max
Units
System Parameters, Adjustable Regulators(3), Test Circuit Figure 2
VOUT
Feedback Voltage
VIN = 12V, ILOAD = 0.1A, VOUT = 5V
1.217
1.230
1.243
V
VOUT
Feedback Voltage
0.1A ≤ ILOAD ≤ 0.5A, 7V≤ VIN ≤ 40V,
1.193
1.230
1.267
V
(LM2574)
VOUT = 5V
1.180
1.280
V
η
Efciency
VIN = 12V, ILOAD = 0.1A, VOUT = 5V
78
%
System Parameters, 3.3V Regulators(3), Test Circuit Figure 3
VOUT
Output Voltage
VIN = 12V, ILOAD = 0.1A, VOUT = 3.3V
3.234
3.3
3.366
V
VOUT
Output Voltage
0.1A ≤ ILOAD ≤ 0.5A, 4.75V ≤ VIN ≤ 40V,
3.168
3.3
3.432
V
(LM2574-3.3)
VOUT = 3.3V
3.135
3.465
V
η
Efciency
VIN = 12V, ILOAD = 0.1A
73
%
System Parameters, 5V Regulators(3), Test Circuit Figure 3
VOUT
Output Voltage
VIN = 12V, ILOAD = 0.1A, VOUT = 5V
4.900
5.0
5.100
V
VOUT
Output Voltage
0.1A ≤ ILOAD ≤ 0.5A, 7V≤ VIN ≤ 40V,
4.800
5.0
5.200
V
(LM2574-5.0)
VOUT = 5V
4.750
5.250
V
η
Efciency
VIN = 12V, ILOAD = 0.1A, VOUT = 5V
78
%
Notes:
1. “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. “Operating Ratings” indicate for which the device is
intended to be functional, but do not guarantee specic performance limits. For guaranteed specications and test conditions, see “Electrical Charac-
teristics.”
2. All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via testing.
3. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.
When the LM2574 is used as shown in Figure 1 test circuit, system performance will be shown in system parameters section of “Electrical Charac-
teristics.”
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相關(guān)代理商/技術(shù)參數(shù) |
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| LM2574-5 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:EASY SWITCHERE⑩ 0.5 A STEP-DOWN VOLTAGE REGULATOR |
| LM2574-5.0 WAF | 制造商:Texas Instruments 功能描述: |
| LM2574-5.0BN | 功能描述:IC REG BUCK 5V 0.5A 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LM2574-5.0BWM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM2574-5.0YN | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 0.5A Step-Down SMPS Regulator (Lead Free) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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