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参数资料
| 型号： | LTC3425EUH#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ 5A 32QFN |
| 标准包装： | 73 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.4 V ~ 5.25 V |
| 输入电压： | 0.5 V ~ 4.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 100kHz ~ 2MHz |
| 电流 - 输出： | 5A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
LTC3425
OPERATIO
SWITCH A
VOLTAGE
SWITCH B
VOLTAGE
SWITCH C
VOLTAGE
SWITCH D
VOLTAGE
INDUCTOR A
CURRENT
INDUCTOR B
CURRENT
INDUCTOR C
CURRENT
INDUCTOR D
CURRENT
INPUT CURRENT
RECTIFIER A
CURRENT
RECTIFIER B
CURRENT
RECTIFIER C
CURRENT
RECTIFIER D
CURRENT
OUTPUT RIPPLE
CURRENT
3425 F02
Figure 2. Simplified Voltage and Current Waveforms
for 4-Phase Operation at 50% Duty Cycle
This approach can be used to reduce solution cost and
board area in applications not requiring the full power
capability of the LTC3425, or where peak efficiency may
not be as important as cost and size. In this case, phase A
should always be used, since this is the only phase active
in Burst Mode operation and phase C is recommended as
the second phase for the lowest output ripple, since it is
180 ° out of phase with phase A. Figure 4 illustrates the
efficiency differences with two, three and four phases in a
typical 2-cell to 3.3V boost application. In this example,
you can see that for maximum loads less than 1A, the
efficiency penalty for using only two or three phases is
fairly small. Keep in mind, however, that this penalty will
grow larger as the input voltage drops. Output ripple will
also increase with each phase that is eliminated.
Low Voltage Start-Up
The LTC3425 includes an independent start-up oscillator
designed to start up at input voltages as low as 0.88V. The
frequency and peak current limit during start-up are
3425f
12
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| LTC3426 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2MHz Step-Up DC/DC Converter in SOT-23 |
| LTC3426ES6 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 1.6V to 4.3V 6-Pin TSOT-23 |
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| LTC3426ES6#TRMPBF | 功能描述:IC REG BOOST ADJ 2A TSOT23-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色产品:BD91x Series Step-Down Regulators 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:2 输出电压:3.3V，0.8 V ~ 2.5 V 输入电压:4.5 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:1MHz 电流 - 输出:1.5A 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:VQFN020V4040 产品目录页面:1373 (CN2011-ZH PDF) 其它名称:BD9152MUV-E2TR |
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