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參數(shù)資料
| 型號： | LT3502AEDC#TRM |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.1 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 2 X 2 MM, PLASTIC, DFN-10 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 457K |
| 代理商： | LT3502AEDC#TRM |
LT3502/LT3502A
14
3502f
APPLICATIONS INFORMATION
Figure 8b. Diode D4 Prevents a Shorted Input from Discharging
a Backup Battery Tied to the Output; it Also Protects the Circuit
from a Reversed Input. The LT3502/LT3502A Runs Only When
the Input is Present
VIN
3502 F08b
SHDN
BOOST
SW
LT3502A
BD
D4
GND
DA
FB
VIN
VOUT
+
Figure 8a. The LT3502A Reduces its Frequency to Below 250kHz
to Protect Against Shorted Output with 40V Input
VSW
10V/DIV
2
μs/DIV
VIN = 40V
VOUT = 0V
L = 6.8
μH
COUT = 10μF
3502 F08a
IL
500mA/DIV
RUN
VSW
10V/DIV
VIN = 12V
VOUT = 3.3V
L = 6.8
μH
COUT = 10μF
VOUT
2V/DIV
5
μs/DIV
IL
500mA/DIV
VSW
10V/DIV
VIN = 12V
VOUT = 3.3V
L = 6.8
μH
COUT = 10μF
VOUT
2V/DIV
50
μs/DIV
3502 F07
IL
500mA/DIV
SHDN
GND
3502 F07a
RUN
50k
0.1
μF
SHDN
GND
3502 F07b
Figure 7. To Soft Start the LT3502A, Add a Resistor and Capacitor to the
SHDN Pin
Application Note 88 for a complete discussion). The low
loss ceramic capacitor combined with stray inductance in
series with the power source forms an underdamped tank
circuit, and the voltage at the VINpinoftheLT3502/LT3502A
can ring to twice the nominal input voltage, possibly ex-
ceeding the LT3502/LT3502A’s rating and damaging the
part. If the input supply is poorly controlled or the user
will be plugging the LT3502/LT3502A into an energized
supply, the input network should be designed to prevent
this overshoot. Figure 9 shows the waveforms that result
when an LT3502/LT3502A circuit is connected to a 24V
supply through six feet of 24-gauge twisted pair. The rst
plot is the response with a 2.2μF ceramic capacitor at the
input. The input voltage rings as high as 35V and the input
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3502AEDCTRMPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 3-40V DFN8EP 制造商:Linear Technology 功能描述:750kHz/2.2MHz 500mA Step-Down Reg LT3502 |
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| LT3502AEMS#PBF | 功能描述:IC REG BUCK ADJ 0.5A 10MSOP 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:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 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:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3502AEMS#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.2MHZ |
| LT3502AEMS#TRPBF | 功能描述:IC REG BUCK ADJ 0.5A 10MSOP 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:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 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:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
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