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參數(shù)資料
| 型號： | LM2574M-12 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER⑩ 0.5A Step-Down Voltage Regulator |
| 中文描述： | 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | SMT-14 |
| 文件頁數(shù)： | 2/24頁 |
| 文件大小： | 397K |
| 代理商： | LM2574M-12 |
LM2574
2
MOTOROLA ANALOG IC DEVICE DATA
Figure 1. Block Diagram and Typical Application
7.0 – 40 V
Unregulated
DC Input
L1
330
μ
H
Pwr
Gnd
+Vin
5
Cin
22
μ
F
4
ON/OFF
3
Output
7
Feedback
1
D1
1N5819
Cout
220
μ
F
Typical Application
(Fixed Output Voltage Versions)
Representative Block Diagram and Typical Application
Unregulated
DC Input
+Vin
5
Cout
Feedback
1
Cin
L1
D1
R2
R1
1.0 k
Output
7
Pwr Gnd
4
ON/OFF
3
Reset
Latch
Thermal
Shutdown
52 kHz
Oscillator
1.235 V
Band–Gap
Reference
Freq
Shift
18 kHz
Comparator
Fixed Gain
Error Amplifier
Current
Limit
Driver
1.0 Amp
Switch
ON/OFF
3.1 V Internal
Regulator
Vout
Load
Output
Voltage Versions
3.3 V
5.0 V
12 V
15 V
For adjustable version
R1 = open, R2 = 0
R2
(
)
1.7 k
3.1 k
8.84 k
11.3 k
LM2574
5.0 V Regulated
Output 0.5 A Load
Sig
Gnd
2
Sig Gnd
2
ABSOLUTE MAXIMUM RATINGS
(Absolute Maximum Ratings indicate limits beyond which
damage to the device may occur).
Rating
Symbol
Value
Unit
Maximum Supply Voltage
Vin
–
45
V
ON/OFF Pin Input Voltage
–0.3 V
≤
V
≤
+Vin
–1.0
V
Output Voltage to Ground (Steady State)
–
V
DW Suffix, Plastic Package Case 751G
Max Power Dissipation
Thermal Resistance, Junction–to–Air
PD
R
θ
JA
Internally Limited
145
W
°
C/W
N Suffix, Plastic Package Case 626
Max Power Dissipation
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
PD
R
θ
JA
R
θ
JC
Tstg
–
Internally Limited
100
5.0
W
°
C/W
°
C/W
Storage Temperature Range
–65
°
C to +150
°
C
°
C
Minimum ESD Rating
(Human Body Model: C = 100 pF, R = 1.5 k
)
Lead Temperature (Soldering, 10 seconds)
2.0
kV
–
260
°
C
Maximum Junction Temperature
TJ
150
°
C
NOTE:
ESD data available upon request.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2574M-12/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2574M-12/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter IC |
| LM2574M-15 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SIMPLE SWITCHER⑩ 0.5A Step-Down Voltage Regulator |
| LM2574M-15/NOPB | 功能描述:IC REG BUCK 15V 0.5A 14SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:SIMPLE SWITCHER® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM2574M-3.3 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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