參數(shù)資料
型號： LT3579EFE-1#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, PDSO20
封裝： 4.40 MM, LEAD FREE, PLASTIC, TSSOP-20
文件頁數(shù)： 16/40頁
文件大?。?/td> 503K
代理商： LT3579EFE-1#TRPBF
LT3579/LT3579-1
23
35791f
applicaTions inForMaTion
VIN
12V
VOUT2
100V
200mA
VOUT1
67V
100mA
10H
4.7F
6.8F
4.7F
6.8F
100k
10F
SW1 SW2
VIN
FB
CLKOUT
VC
SS
GND
GATE
FAULT
SYNC
RT
SHDN
LT3579
35791 F16
383k
6.5k
34k
470pF
2.2F
27pF
86.6k
536k
VIN
Figure 16. High VOUT Charge Pump Topology
VIN
CIN
CSS
CF
CC
RC
–VOUT
SW1
SW2
VIN
FB
CLKOUT
VC
SS
GND
GATE
SHDN
FAULT
SYNC
RT
LT3579
COUT
100k
L1
D1
D2
D3
C1
RFB
35791 F15
RT
HOT PLUG
The high inrush current associated with hot-plugging VIN
can be largely rejected with the use of an external PMOS. A
simple hot-plug controller can be designed by connecting
an external PMOS in series with VIN, with the gate of the
PMOS being driven by the GATE pin of the LT3579. Since
the GATE pin pull-down current is linearly proportional to
theSSvoltage,andtheSSchargeuptimeisrelativelyslow,
the GATE pin pull-down current will increase gradually,
thereby turning on the external PMOS slowly. Controlled
in this manner, the PMOS acts as an input current limiter
when VIN hot-plugs or ramps up sharply.
Likewise, when the PMOS is connected in series with the
output, inrush currents into the output capacitor can be
limitedduringahot-plugevent.Toillustratethis,thecircuit
in Figure 6 was re-configured by adding a large 1500F
capacitor to the output. An 18Ω resistive load was used
and a 2.2F capacitor was placed on SS. Figure 14 shows
the result of hot-plugging this re-configured circuit. The
inductor current is well behaved and VOUT comes up once
VIN settles out.
Figure 15. Single Inductor Inverting Topology
Figure 14. VIN Hot-Plug Control. Inrush Current is Well Controlled
1s/DIV
VIN
5V/DIV
VOUT
10V/DIV
IL
5A/DIV
SS
1V/DIV
35791 F14
相關(guān)PDF資料
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LT3579IFE-1#PBF SWITCHING REGULATOR, PDSO20
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT3579EFE-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:6A Boost/Inverting DC/DC Converter with Fault Protection
LT3579EFE-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:6A Boost/Inverting DC/DC Converter with Fault Protection
LT3579EUFD#PBF 功能描述:IC REG MULTI CONFIG SYNC 20QFN 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:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤
LT3579EUFD#TRPBF 功能描述:IC REG MULTI CONFIG SYNC 20QFN 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:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤
LT3579EUFD-1#PBF 功能描述:IC REG MULTI CONFIG SYNC 20QFN 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:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤
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