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參數(shù)資料
| 型號： | LTC4227CUFD-2#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| 封裝： | 4 X 5 MM, PLASTIC, MO-220, QFN-20 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 307K |
| 代理商： | LTC4227CUFD-2#TRPBF |
LTC4227-1/LTC4227-2
17
422712f
applicaTions inForMaTion
It is also important to place the bypass capacitor, C1, for
the INTVCC pin, as close as possible between INTVCC and
GND. Also place CCP1 near the CPO1 and IN1 pins, and
CCP2 near the CPO2 and IN2 pins. The transient voltage
suppressors, Z1 and Z2, when used, should be mounted
close to the LTC4227 using short lead lengths.
Prioritizing Supplies with D2ON
Figure 8 shows a diode-OR application where a resistive
divider connected from IN1 at the D2ON pin controls the
turn-on of the ideal diode MOSFET, MD2, in the IN2 supply
path. When the IN1 supply voltage falls below 2.8V, it turns
on the ideal diode MOSFET, MD2, causing the diode-OR
output to be switched from the main 3.3V supply at IN1
to the auxiliary 3.3V supply at IN2. This configuration
permits the load to be supplied from a lower IN1 supply
as compared to IN2 until IN1 falls below the MD2 turn-on
threshold. The threshold value used should not allow the
IN1 supply to be operated at more than one diode voltage
belowIN2.Otherwise,MD2conductsthroughtheMOSFET’s
body diode. The resistive divider connected from SENSE+
at the ON pin provides the undervoltage threshold of 2.6V
for the diode-OR output supply.
D
G
D
S
D
S
D
S
D
S
D
S
D
G
D
S
D
S
D
S
D
G
D
Z2
Z1
RS
MH
PowerPAK SO-8
MD1
PowerPAK SO-8
MD2
PowerPAK SO-8
W
IN1
VIA TO IN1
CURRENT FLOW
TO LOAD
CCP2
422712 F07
20 19 18 17
7
1
2
3
4
5
6
16
15
14
13
12
11
8
9 10
LTC4227UFD
CCP1
RH
C1
OUT
W
IN2
CURRENT FLOW
TO LOAD
TRACK WIDTH W:
0.03" PER AMPERE
ON 1oz Cu FOIL
VIA TO CPO1
VIA TO DGATE2
VIA TO GND PLANE
VIA TO DGATE1
Figure 7. Recommended PCB Layout for Power MOSFETs and Sense Resistor
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4227IGN-1#TRPBF | POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| LTC4227CUFD-1#PBF | POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| LTC4227IUFD-2#PBF | POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| LTC4227CUFD-2#PBF | POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| LTC4227IGN-2#TRPBF | POWER SUPPLY MANAGEMENT CKT, PDSO16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4227CUFD-3#PBF | 制造商:Linear Technology 功能描述:IC CTRLR HOT SWAP 20QFN 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER 2.9-18V 制造商:Linear Technology 功能描述:DIODE-OR/HOT SWAP CTRL, 18V, QFN-20, IC Function:Diode-OR and Hot Swap Controlle |
| LTC4227CUFD-3#TRPBF | 制造商:Linear Technology 功能描述:IC CTRLR HOT SWAP 20QFN 制造商:Linear Technology 功能描述:DIODE-OR/HOT SWAP CTRL, 18V, QFN-20, IC Function:Diode-OR and Hot Swap Controlle |
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| LTC4227CUFD-4#TRPBF | 制造商:Linear Technology 功能描述:IC CTRLR HOT SWAP 20QFN 制造商:Linear Technology 功能描述:DIODE-OR/HOT SWAP CTRL, 18V, QFN-20, IC Function:Diode-OR and Hot Swap Controlle |
| LTC4227IGN-1#PBF | 功能描述:IC CONTROLLER HOT SWAP 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
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