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参数资料
| 型号： | LTC3805EDD-5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK PWM 10DFN |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 700kHz |
| 占空比： | 95% |
| 电源电压： | 3.95 V ~ 75 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 相关产品： | 732-2264-6-ND - TRANS FLYBACK LTC3805 36.3UH 732-2264-1-ND - TRANS FLYBACK LTC3805 36.3UH 732-2264-2-ND - TRANS FLYBACK LTC3805 36.3UH |
LTC3805-5
FEATURES
Adjustable Frequency
Current Mode Flyback/
Boost/SEPIC DC/DC Controller
DESCRIPTION
V IN and V OUT Limited Only by External Components
4.5V Undervoltage Lockout Threshold
Adjustable Slope Compensation
Adjustable Overcurrent Protection with Automatic
Adjustable Operating Frequency (70kHz to 700kHz)
Synchronizable to an External Clock
±1.5% Reference Accuracy
Only 100mV Current Sense Voltage Drop
RUN Pin with Precision Threshold and Adjustable
Programmable Soft-Start with One External Capacitor
Low Quiescent Current: 360μA
Small 10-Lead MSOP and 3mm × 3mm DFN
Automotive Power Supplies
Telecom Power Supplies
Isolated Electronic Equipment
Auxiliary/Housekeeping Power Supplies
Power over Ethernet
n
n
n
n
Restart
n
With One External Resistor
n
n
n
n
Hysteresis
n
n
n
APPLICATIONS
n
n
n
n
n
TYPICAL APPLICATION
5V to 12V/1A Boost Converter
The LTC ? 3805-5 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 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 V IN 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 R SENSE and ThinSOT are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Efficiency and Power Loss vs Load Current
100
2.5
V IN
5V
22μF
×2
RUN
V CC
4.3μH
GATE
UPS840
100μF
V OUT
12V
1A
95
90
5V EFFICIENCY
8.5V EFFICIENCY
2.0
1.5
20k
470pF
0.1μF
118k
FS FB
LTC3805-5
I TH OC
SSFLT I SENSE
SYNC
GND
1.33k
3k
8m
191k
13.7k
85
80
8.5V LOSS
5V LOSS
1
0.5
38055 TA01a
75
0.01
0.1
1
10
0
LOAD CURRENT (A)
38055TA01b
38055fe
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3805EMSE | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Sync Flyback 8.8V to 75V Input 10-Pin MSOP EP |
| LTC3805EMSE#PBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP 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) |
| LTC3805EMSE#TRPBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP 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) |
| LTC3805EMSE-5#PBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP 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) |
| LTC3805EMSE-5#PBF | 制造商:Linear Technology 功能描述:IC, FLYBACK/ BOOST/SEPIC CTRL, MSOP-10 |
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