參數(shù)資料
型號： LT3740EDHC
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 0.14 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 5 X 3 MM, PLASTIC, MO-229WJED-1, DFN-16
文件頁數(shù)： 1/20頁
文件大?。?/td> 234K
代理商： LT3740EDHC
LT3740
1
3740fc
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Wide Operating Range,
Valley Mode, No RSENSE
Synchronous Step-Down Controller
The LT3740 is a synchronous step-down switching
regulator controller that drives N-channel power MOSFET
stages. The controller uses valley current mode architecture
to achieve very low duty cycles with excellent transient
response without requiring a sense resistor.
The LT3740 includes an internal step-up converter to
provide a bias 7.8V higher than the input voltage for the
drive. This enables the part to work from an input voltage
as low as 2.2V.
The XREF pin is an external reference input that allows the
user to override the internal 0.8V feedback reference with
any lower value, allowing full control of the output voltage
during operation, output voltage tracking or soft-start.
The LT3740 has three current limit levels that can be
chosen by connecting the RANGE pin to ground, open,
and input respectively.
High Efciency Step-Down Converter
n Wide VIN Range: 2.2V to 22V
n Internal Boost Provides 6V Gate Drive
For VIN Down to 2.2V
n No Sensing Resistor Required
n Dual N-Channel MOSFET Synchronous Drive
n Valley Current Mode Control
n Optimized for High Step-Down Ratio
n Power Good Output Voltage Monitor
n 0.8V Reference
n Three Pin-Selected Current Limit Levels
n Constant Switching Frequency: 300kHz
n Programmable Soft-Start
n Output Voltage Tracking
n Available in 16-Pin 5mm
× 3mm DFN
n Notebook and Palmtop Computers, PDA
n Portable Instruments
n Distributed Power Systems
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Efciency vs Load Current
SWB
VIN
SHDN
XREF
RANGE
VC
BGDP
BIAS
TGATE
SW
SN
+
BGATE
GND
LT3740
SN
–
PGND
FB
3740 TA01a
0.9μH
1μF
0.22μF
VOUT
1.8V
10A
VIN
3V to 12V
M1
HAT2168H
M2
HAT2165H
100μF
3
10μF
39pF
22μH
20k
15k
1nF
22pF
80.6k
105k
15k
1Ω
D1
B320A
1Ω
LOAD CURRENT (A)
0
EFFICIENCY
(%)
86
92
88
90
94
3740 TA01b
84
82
80
46
2
8
10
VIN = 3V
VIN = 5V
VIN = 12V
VOUT = 1.8V
相關(guān)PDF資料
PDF描述
LT3741EFE#PBF SWITCHING CONTROLLER, 1070 kHz SWITCHING FREQ-MAX, PDSO20
LT3741IFE#TRPBF SWITCHING CONTROLLER, 1070 kHz SWITCHING FREQ-MAX, PDSO20
LT3741EUF#PBF SWITCHING CONTROLLER, 1070 kHz SWITCHING FREQ-MAX, PQCC20
LT3741EUF#TRPBF SWITCHING CONTROLLER, 1070 kHz SWITCHING FREQ-MAX, PQCC20
LT3741IUF#PBF SWITCHING CONTROLLER, 1070 kHz SWITCHING FREQ-MAX, PQCC20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT3740EDHC#PBF 功能描述:IC REG CTRLR BUCK PWM CM 16-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
LT3740EDHC#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 16-DFN 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)
LT3740EDHC-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide Operating Range, Valley Mode, No RSENSE? Synchronous Step-Down Controller
LT3740EDHC-TR 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide Operating Range, Valley Mode, No RSENSE? Synchronous Step-Down Controller
LT3740EDHC-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide Operating Range, Valley Mode, No RSENSE? Synchronous Step-Down Controller
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