DC-DC step-down chip (Buck)
DC-DC step-down chip (Buck)
顾名思义，Buck型降压开关稳压器是指输入电压高于输出电压。在Buck电路中，只有一个功率管就是非同步式的，非同步式是靠二极管的续流来完成上图绿色区域部分。同步式整流是有两个功率管一般称之为上管和下管，这两个管由逻辑器控制，同一时刻只有一个管处于导通状态。对于同步与非同步结构来说是不同的，非同步结构中使用二极管续流可以防止电感电流方向不会降到０以下。对于同步结构，使用ＭOS管来替代二级管，MOS管可以允许电感电流反向即从负载流出电流，导致电感电流在０以下。
Part Number
TYPE
Vin(Min)
Vin(Max)
Vout
Iout(Max)
ILimit
VFB
FSW
Iq(TYP)
Mode
Efficiency
EN
Package
| Part Number | TYPE | Vin(Min) | Vin(Max) | Vout | Iout(Max) | ILimit | VFB | FSW | Iq(TYP) | Mode | Efficiency | EN | Package | Application | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (V) | (V) | (V) | (A) | (A) | (V) | (Mhz) | (μA) | ||||||||
|
FDK1620 | BUCK | 4.5 | 16 | adj | 2 | 2.3 | 0.6 | 0.6 | 400 | COT | 93% | Y | SOT23-6 | Set-top boxes / LCD,OLED Displays / IP cameras / Routers |
|
|
FDK51730 | BUCK | 4.5 | 17 | adj | 3 | - | 0.8 | 0.2 ~1.2 | 2 | COT | 93% | Y | QFN14 | / Broadband / Network and Communication Infras•tructure / Automated Test and Medical Devices / DSP and FPGA load points (12V bus) |
|
|
FDK51830 | BUCK | 4.5 | 18 | adj | 3 | - | 0.8 | 0.6 | <10 | COT | 93% | Y | HTSSOP14 | Digital TV power / Digital Set-top Boxes / Networked Home Terminals / Automation and Control Power Supplies. |
|
|
FDK51760 | BUCK | 4.5 | 17 | adj | 6 | - | 0.8 | 0.2 ~1.5 | 800 | COT | 93% | Y | QFN14 | High-density Distributed Power Systems / High-Performance Point-of-load Adjustments Embedded Systems / Network Base Station Communications Infrastructure. |
|
|
FDK51860 | BUCK | 4.5 | 18 | adj | 6 | - | 0.8 | 0.65 | 950 | COT | 93% | Y | PSOP8 | Digital TV Power / HD Blu-ray Disc™ Players / Networked Home Terminal Devices / Digital Set-top Boxes (STB). |
|
|
FDK1596 | BUCK | 4.5 | 40 | adj | 2 | 3 | 1.235 | 0.15 | 5000 | PWM | 81% | Y | SOP-8 HSOP-8 | Household Appliances / Grid Infrastructure / EPOS / Home Theater Systems. |
|
|
FDK2576_HV | BUCK | 7 | 60 | adj | 3 | 5.8 | 1.23 | 0.05 | 10000 | PWM | 88% | - | TO-220B TO-220-5 TO-263-5 SOP-8 HSOP-8 | Household Appliances / Grid infrastructure / EPOS / Home Theater Systems. |
|
|
FDK20006 | BUCK | - | 200 | adj | 0.6 | - | 2.5 | PFM | 120 | CV | - | N | SOP7 | Electric vehicle / Controllers / Vehicle devices / Power tools. |
|
|
FDK20010 | BUCK | - | 200 | adj | 1 | - | 2.5 | PFM | 120 | CV | - | N | SOP7 | Electric vehicle / Controllers / Vehicle devices / Power tools. |
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