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参数资料
| 型号： | LTC3805MPMSE-5#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件页数： | 1/20页 |
| 文件大小： | 254K |
| 代理商： | LTC3805MPMSE-5#PBF |
LTC3805-5
1
38055fe
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 flyback, 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 360A of quiescent current during
normal operation and only 40A 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, LTM, Burst Mode, Linear Technology and the Linear logo are registered
trademarks, No RSENSE and ThinSOT are 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: 360A
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
Efficiency and Power Loss vs Load Current
LTC3805-5
GND
ITH
RUN
GATE
OC
ISENSE
SSFLT
FS
FB
VCC
118k
3k
8m
22F
×2
SYNC
1.33k
4.3H
UPS840
VIN
5V
VOUT
12V
1A
13.7k
191k
100F
38055 TA01a
0.1F
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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相关代理商/技术参数 |
参数描述 |
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| LTC3806EDE | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3806EDE#PBF | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3806EDE#TR | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3806EDE#TRPBF | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3808EDE | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Sync Step Down 2.75V to 9.8V Input 14-Pin DFN EP |
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