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| 型号： | LTC3872ITS8#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM CM TSOT23-8 |
| 标准包装： | 500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 650kHz |
| 电源电压： | 2.75 V ~ 9.8 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： | SOT-23-8 薄型，TSOT-23-8 |
| 包装： | 带卷 (TR) |
LTC3872
No R SENSE
Current Mode Boost
DC/DC Controller
No Current Sense Resistor Required
V OUT up to 60V
Constant Frequency 550kHz Operation
Internal Soft-Start and Optional External Soft-Start
Adjustable Current Limit
Pulse Skipping at Light Load
V IN Range: 2.75V to 9.8V
±1.5% Voltage Reference Accuracy
Current Mode Operation for Excellent Line and Load
Low Profile (1mm) SOT-23 and 2mm × 3mm DFN
Telecom Power Supplies
42V Automotive Systems
24V Industrial Controls
IP Phone Power Supplies
FEATURES
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Transient Response
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Packages
APPLICATIONS
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TYPICAL APPLICATION
High Efficiency 3.3V Input, 5V Output Boost Converter
DESCRIPTION
The LTC ? 3872 is a constant frequency current mode
boost DC/DC controller that drives an N-channel power
MOSFET and requires very few external components. The
No R SENSE TM architecture eliminates the need for a sense
resistor, improves efficiency and saves board space.
The LTC3872 provides excellent AC and DC load and line
regulation with ±1.5% output voltage accuracy. It incor-
porates an undervoltage lockout feature that shuts down
the device when the input voltage falls below 2.3V.
High switching frequency of 550kHz allows the use of a
small inductor. The LTC3872 is available in an 8-lead low
profile (1mm) ThinSOT TM package and 8-pin 2mm × 3mm
DFN package.
L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
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
1.8nF
17.4k
47pF
11k
1%
V IN
I TH V IN
IPRG
LTC3872
GND SW
V FB RUN/SS NGATE
1nF
34.8k
1%
M1
1μH
D1
100μF
× 2
10μF
V IN
3.3V
V OUT
5V
2A
100
90
80
70
60
50
40
30
20
10
10
1
0.1
0.01
3872 TA01
0
1
10
100 1000
0.001
10000
LOAD CURRENT (mA)
3872 TA01b
3872fc
For more information www.linear.com/LTC3872
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相关代理商/技术参数 |
参数描述 |
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| LTC3873EDDB#PBF | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Up 8.8V to 75V Input 8-Pin DFN EP |
| LTC3873EDDB#TRM | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Up 8.8V to 75V Input T/R |
| LTC3873EDDB#TRMPBF | 功能描述:IC REG CTRLR BST FLYBK PWM 8-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) |
| LTC3873EDDB#TRPBF | 功能描述:IC REG CTRLR BST FLYBK PWM 8-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) |
| LTC3873EDDB-5#PBF | 制造商:Linear Technology 功能描述:DP-SWREG/Isolated, CUT TAPE No Rsense Constant Frequency Current Mode Boost/Flyb |
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