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参数资料
| 型号： | LTC3805MPMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK CM 10MSOP |
| 标准包装： | 50 |
| 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： | -55°C ~ 150°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
LTC3805
V IN and V OUT Limited Only by External Components
Adjustable Slope Compensation
Adjustable Overcurrent Protection with Automatic
Adjustable Operating Frequency (70kHz to 700kHz)
Synchronizable to an External Clock
±1.5% Reference Accuracy
Current Mode Operation for Excellent Line and Load
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
Telecom Power Supplies
42V and 12V Automotive Power Supplies
Isolated Electronic Equipment
FEATURES
n
n
n
Restart
n
with One External Resistor
n
n
n
Transient Response
n
Hysteresis
n
n
n
APPLICATIONS
n
n
n
TYPICAL APPLICATION
Adjustable Frequency
Current Mode Flyback
DC/DC Controller
DESCRIPTION
The LTC ? 3805 is a current mode controller for flyback
DC/DC converters designed to drive an N-channel MOSFET
in high input and output voltage converter applications.
Operating frequency and slope compensation can be
programmed by external resistors. Programmable overcur-
rent sensing protects the converter from short-circuits.
Soft-start can be programmed using an external capacitor
and the soft-start capacitor also programs an automatic
restart feature.
The LTC3805 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
can be powered from a high V IN through a resistor or it
can be powered directly from a low impedance DC voltage
of 9V or less.
The LTC3805 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.
V IN
36V TO
72V
2.2μF
× 2
36V – 72V to 5V/2A Nonisolated Flyback Converter
221k 100k
V OUT
5V
AT 2A
100μF
× 2
100
90
80
Efficiency and Power Loss
vs Load Current; V O = 5V
V IN = 48V
10
70
EFFICIENCY
22μF
60
I TH
8.66k
20k
470pF
0.1μF
118k
FS FB
V CC
RUN GATE
LTC3805
OC
SSFLT I SENSE
SYNC GND
1.33k
3k
68m
71.5k
13.7k
50
40
30
20
10
0
0.01
LOSS
0.1 1
LOAD CURRENT (A)
1
0.1
10
3805 TA01b
3805 TA01a
3805fg
1
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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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