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參數(shù)資料
| 型號： | LTC3873EDDB#TRM |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 240 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 3 X 2 MM, 0.75 MM HEIGHT, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 185K |
| 代理商： | LTC3873EDDB#TRM |
LTC3873
1
3873fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
No RSENSETM Constant
Frequency Current Mode
Boost/Flyback/SEPIC
DC/DC Controller
The LTC
3873 is a constant frequency current mode,
boost, yback or SEPIC DC/DC controller that drives an
N-channel power MOSFET in high input and output volt-
age converter applications. Soft-start can be programmed
using an external capacitor.
The LTC3873 provides ±1.5% output voltage accuracy and
consumes only 300μA quiescent current during normal
operation and only 55μA during micropower start-up.
Using a 9.3V internal shunt regulator, the LTC3873 can
be powered from a high input voltage through a resistor
or it can be powered directly from a low impedance DC
voltage of 9V or less.
The LTC3873 is available in 8-lead ThinSOT and 2mm
×
3mm DFN packages.
n VIN and VOUT Limited Only by External Components
n Internal or Programmable External Soft-Start
n Constant Frequency 200kHz Operation
n Adjustable Current Limit
n Current Sense Resistor Optional
n Maximum 60V on SW Node with RDS(ON) Sensing
n ±1.5% Voltage Reference Accuracy
n Current Mode Operation for Excellent Line and Load
Transient Response
n Low Quiescent Current: 300μA
n Low Prole (1mm) ThinSOT
TM and (0.75mm)
2mm
× 3mm DFN Package
n Telecom Power Supplies
n 42V and 12V Automotive Power Supplies
n Portable Electronic Equipment
Efciency and Power Loss vs Load Current
5V Output Nonisolated Telecom Power Supply
PARAMETER
LTC3873
LTC3873-5
VCC UV+
8.4V
3.9V
VCC UV–
4V
2.9V
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
No RSENSE and ThinSOT are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
VCC
ITH
NGATE
LTC3873
RUN/SS
GND
0.1μF
100μF
6.3V
X5R
3
VOUT
5V
2A MAX
2.2nF
10μF
10V
X5R
4.7μF
100V
X5R
7.5k
221k
D1
T1
D2
VIN
36V TO 72V
68mΩ
3873 TA01a
M1
SW
IPRG
VFB
12.1k
38.3k
LOAD CURRENT (mA)
10
40
EFFICIENCY
(%)
POWER
LOSS
(mW)
50
60
70
80
1000
3873 TA01b
30
20
10
0
90
100
EFFICIENCY
1000
500
2000
1500
2500
10
3000
POWER LOSS
VIN = 72V
VIN = 60V
VIN = 48V
VIN = 36V
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參數(shù)描述 |
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| LTC3873ETS8#PBF | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Up 8.8V to 75V Input 8-Pin TSOT-23 |
| LTC3873ETS8#TRMPBF | 功能描述:IC REG CTRLR BST FLYBK TSOT23-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)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(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) |
| LTC3873ETS8#TRPBF | 功能描述:IC REG CTRLR BST FLYBK TSOT23-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)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(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) |
| LTC3873ETS8-5#PBF | 制造商:Linear Technology 功能描述:DP-SWREG/Isolated, CUT TAPE No Rsense Constant Frequency Current Mode Boost/Flyb |
| LTC3873ETS8-5#TRM | 制造商:Linear Technology 功能描述: |
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