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| 型号： | LT3510IFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 25/30页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A DL 20TSSOP |
| 标准包装： | 74 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 23.8 V |
| 输入电压： | 3.1 V ~ 25 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 250kHz ~ 1.5MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 20-TSSOP-EP |
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LT3510
APPLICATIONS INFORMATION
to the internal planes with vias can further reduce ther-
mal resistance. With these steps, the thermal resistance
from die (or junction) to ambient can be reduced to θ JA
= 45°C/W.
The power dissipation in the other power components
such as catch diodes, boost diodes and inductors, cause
additional copper heating and can further increase what
the IC sees as ambient temperature. See the LT1767 data
sheet’s Thermal Considerations section.
Single, Low Ripple 4A Output
The LT3510 can generate a single, low ripple 4A output
if the outputs of the two switching regulators are tied
together and share a single output capacitor. By tying the
two FB pins together and the two V C pins together, the
two channels will share the load current. There are several
advantages to this 2-phase buck regulator. Ripple currents
at the input and output are reduced, reducing voltage ripple
and allowing the use of smaller, less expensive capacitors.
Although two inductors are required, each will be smaller
than the inductor required for a single-phase regulator. This
may be important when there are tight height restrictions
on the circuit.
There is one special consideration regarding the 2-phase
circuit. When the difference between the input voltage and
output voltage is less than 2.5V, then the boost circuits may
prevent the two channels from properly sharing current.
If, for example, channel 1 gets started ?rst, it can supply
the load current, while channel 2 never switches enough
current to get its boost capacitor charged.
In this case, channel 1 will supply the load until it reaches
current limit, the output voltage drops, and channel 2 gets
started. Two solutions to this problem are shown in the
Typical Applications section.
The single 3.3V/4A output converter generates a boost sup-
ply from either SW that will service both switch pins.
The synchronized 3.3V/8A output converter utilizes
undervoltage lockout to prevent the start-up condition.
Other Linear Technology Publications
Application notes AN19, AN35 and AN44 contain more
detailed descriptions and design information for buck
regulators and other switching regulators. The LT1376
data sheet has a more extensive discussion of output
ripple, loop compensation and stability testing. Design
Note DN100 shows how to generate a dual (+ and –)
output supply using a buck regulator.
3510fe
25
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3510IFE-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Dual Tracking 2A Step-Down Switching Regulator |
| LT3510IFE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Dual Tracking 2A Step-Down Switching Regulator |
| LT3511 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic High Voltage Isolated Flyback Converter No External Start-Up Resistor |
| LT3511EMS#PBF | 功能描述:IC REG FLYBACK ISOLATD 16-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 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:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3511EMS#TRPBF | 功能描述:IC REG FLYBK ISO ADJ .24A 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
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