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)： 5/20頁
文件大?。?/td> 457K
代理商： LT3502AEDC#TRM
LT3502/LT3502A
13
3502f
APPLICATIONS INFORMATION
Short and Reverse Protection
If the inductor is chosen so that it won’t saturate excessively,
the LT3502/LT3502A will tolerate a shorted output. When
operating in short-circuit condition, the LT3502/LT3502A
will reduce their frequency until the valley current is 650mA
(Figure 8a). There is another situation to consider in sys-
tems where the output will be held high when the input to
the LT3502/LT3502A is absent. This may occur in battery
charging applications or in battery backup systems where
a battery or some other supply is diode OR-ed with the
LT3502/LT3502A’s output. If the VIN pin is allowed to oat
and the
SHDN pin is held high (either by a logic signal
or because it is tied to VIN), then the LT3502/LT3502A’s
internal circuitry will pull its quiescent current through
its SW pin. This is ne if your system can tolerate a few
mA in this state. If you ground the
SHDN pin, the SW
pin current will drop to essentially zero. However, if the
VIN pin is grounded while the output is held high, then
parasitic diodes inside the LT3502/LT3502A can pull large
currents from the output through the SW pin and the VIN
pin. Figure 8b shows a circuit that will run only when the
input voltage is present and that protects against a shorted
or reversed input.
Hot Plugging Safely
The small size, robustness and low impedance of ceramic
capacitors make them an attractive option for the input by-
pass capacitor of LT3502/LT3502A circuits. However, these
capacitors can cause problems if the LT3502/LT3502A
are plugged into a live supply (see Linear Technology
Figure 6
(6a) LT3502A Typical Minimum Input Voltage, VOUT = 3.3V
LOAD CURRENT (A)
0.001
7
6
5
4
3
2
1
0
3502 G19
0.01
0.1
1
V
IN
(V)
RUN
START
LOAD CURRENT (A)
0.001
4
V
IN
(V)
6
8
0.01
0.1
1
3502 G20
2
3
5
7
1
0
START
RUN
LOAD CURRENT (A)
0.001
7
6
5
4
3
2
1
0
3502 G21
0.01
0.1
1
V
IN
(V)
RUN
START
LOAD CURRENT (A)
0.001
4
V
IN
(V)
6
8
0.01
0.1
1
3502 G22
2
3
5
7
1
0
START
RUN
(6b) LT3502A Typical Minimum Input Voltage, VOUT = 5V
(6c) LT3502 Typical Minimum Input Voltage, VOUT = 3.3V
(6d) LT3502 Typical Minimum Input Voltage, VOUT = 5V
相關(guān)PDF資料
PDF描述
LT3502IDC#TR 1.1 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10
LT3502IDC#TRM 1.1 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10
LT3502AIDC 1.1 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO10
LT3502IDC 1.1 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10
LT3502EDC 1.1 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10
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
LT3502AEDC-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.1MHz/2.2MHz, 500mA Step-Down Regulators in 2mm × 2mm DFN and MS10
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:- 標準包裝: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:- 標準包裝: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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