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參數資料
| 型號： | LTC3805IDD-5#TRMPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 203K |
| 代理商： | LTC3805IDD-5#TRMPBF |
LTC3805-5
1
38055fb
FEATURES
DESCRIPTION
Adjustable Frequency
Current Mode Flyback/
Boost/SEPIC DC/DC Controller
The LTC3805-5 is a current mode DC/DC controller de-
signed to drive an N-channel MOSFET in yback, boost
and SEPIC converter applications. Operating frequency
and slope compensation can be programmed by external
resistors. Programmable overcurrent sensing protects
the converter from overload and short-circuit conditions.
Soft-start can be programmed using an external capacitor
and the soft-start capacitor also programs an automatic
restart feature.
The LTC3805-5 provides ±1.5% output voltage accuracy
and consumes only 360μA of quiescent current during
normal operation and only 40μA during micropower start-
up. Using a 9.5V internal shunt regulator, the LTC3805-5
can be powered from a high VIN through a resistor or it
can be powered directly from a low impedance DC voltage
from 4.7V to 8.8V.
The LTC3805-5 is available in the 10-lead MSOP package
and the 3mm
× 3mm DFN package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
5V to 12V/1A Boost Converter
TYPICAL APPLICATION
n VIN and VOUT Limited Only by External Components
n 4.5V Undervoltage Lockout Threshold
n Adjustable Slope Compensation
n Adjustable Overcurrent Protection With Automatic
Restart
n Adjustable Operating Frequency (70kHz to 700kHz)
With One External Resistor
n Synchronizable to an External Clock
n ±1.5% Reference Accuracy
n Only 100mV Current Sense Voltage Drop
n RUN Pin With Precision Threshold and Adjustable
Hysteresis
n Programmable Soft-Start With One External Capacitor
n Low Quiescent Current: 360μA
n Small 10-Lead MSOP and 3mm
× 3mm DFN
APPLICATIONS
n Automotive Power Supplies
n Telecom Power Supplies
n Isolated Electronic Equipment
n Auxiliary/Housekeeping Power Supplies
n Power over Ethernet
Efciency and Power Loss vs Load Current
LTC3805-5
GND
ITH
RUN
GATE
OC
ISENSE
SSFLT
FS
FB
VCC
118k
3k
8mΩ
22μF
×2
SYNC
1.33k
4.3μH
UPS840
VIN
5V
VOUT
12V
1A
13.7k
191k
100μF
38055 TA01
0.1μF
20k
470pF
LOAD CURRENT (A)
0.01
EFFICIENCY
(%)
POWER
LOSS
(W)
85
90
38055TA01b
80
75
0.1
1
10
100
95
1
1.5
0.5
0
2.5
2.0
5V EFFICIENCY
5V LOSS
8.5V LOSS
8.5V EFFICIENCY
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3805IMSE#PBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3805IMSE#TRPBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3805IMSE-5#PBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3805IMSE-5#TRPBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3805MPMSE#PBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數:1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
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