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參數(shù)資料
| 型號： | LTC3805IDD |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 260K |
| 代理商： | LTC3805IDD |
LTC3805
3805fe
Features
applications
Description
Adjustable Frequency
Current Mode Flyback
DC/DC Controller
The LTC3805 is a current mode controller for flyback
DC/DCconvertersdesignedtodriveanN-channelMOSFET
in high input and output voltage converter applications.
Operating frequency and slope compensation can be pro-
grammedbyexternalresistors.Programmableovercurrent
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 360A of quiescent current during
normal operation and only 40A during micropower start-
up. Using a 9.5V internal shunt regulator, the LTC3805 can
be powered from a high VIN 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.
36V – 72V to 5V/2A Nonisolated Flyback Converter
n
VIN and VOUT Limited Only by External Components
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
Current Mode Operation for Excellent Line and Load
Transient Response
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
n
Telecom Power Supplies
n
42V and 12V Automotive Power Supplies
n
Isolated Electronic Equipment
LTC3805
GND
ITH
RUN
GATE
OC
ISENSE
SSFLT
FS
FB
VCC
118k
3k
68m
2.2F
2
22F
SYNC
1.33k
8.66k
221k
100k
VIN
36V TO
72V
VOUT
5V
AT 2A
13.7k
71.5k
100F
2
3805 TA01a
0.1F
20k
470pF
LOAD CURRENT (A)
0.01
0
EFFICIENCY
(%)
POWER
LOSS
(W)
20
30
40
50
60
70
0.1
1
3805 TA01b
80
90
100
10
1
0.1
10
VIN = 48V
LOSS
EFFICIENCY
Efficiency and Power Loss
vs Load Current; VO = 5V
typical application
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.
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參數(shù)描述 |
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| LTC3805IDD#PBF | 功能描述:IC REG CTRLR BST FLYBK PWM 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):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) |
| LTC3805IDD#TRPBF | 功能描述:IC REG CTRLR BST FLYBK PWM 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):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) |
| LTC3805IDD-5#PBF | 功能描述:IC REG CTRLR BST FLYBK PWM 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):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) |
| LTC3805IDD-5#TRPBF | 功能描述:IC REG CTRLR BST FLYBK PWM 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):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#PBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):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) |
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