基于MIC2166设计的自适应降压电源控制技术
时间:2023-09-29 10:35来源: 作者: 点击: 次
是同步自降压器，工作电压4.5V到28V，工作频率600kHz，输出电流高达25A，输出电压可调低至0.8V，精度±1%。主要用于STB，网关，路由器和DSL调制解调器，打印机，扫描仪，图像和视频卡，服务器，PC和处理器核以及低压分布。The Micrel is a synchronous adaptive on-time buck controller targeting high performance, cost sensitive applications such as set-top boxes, gateways, routers, computing peripherals, and telecom/networking equipment.
The operates over a supply range of 4.5V to 28V. It has an internal linear regulator which provides a regulated 5V supply to power the internal control circuitry.
MIC2166 operates at a constant 600kHz switching frequency and can be used to drive up to 25A of output current. The output voltage is adjustable down to 0.8V.
A unique Hyper Speed Control architecture enables ultra-fast transient response while reducing the output capacitance and also makes High VIN/Low VOUT operation possible.A UVLO feature is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFET from over heating. Also, a soft-start feature is provided to reduce the inrush current. Short current sensing on the bottom MOSFET with hiccup mode operation ensures protection in case of an output short circuit. Further, the MIC2166 includes an EN pin to shut down the converter and a PGOOD pin to allow simple sequencing.
The MIC2166 is available in a 10 pin MSOP ePad package with a junction operating termperature range from C40℃ to +125℃. All support documentation can be found on
Micrel’s web site at: www.micrel.com.
MIC2166主要特性：
Hyper Speed Control architecture enables
- High delta V operation (VIN=28V and VOUT=0.8V)
- Smallest output capacitance
Built-in 5V regulator for single-supply operation
Any CapacitorTM stable
- Zero ESR to high ESR
Power-Good output
Input voltage range: 4.5V to 28V
5μA typical shutdown current
25A output current drive capability
Output down to +0.8V with ±1% accuracy
600kHz switching frequency
Internal 5ms digital soft-start
Thermal shutdown and hiccup current limit protection
No external current-sense resistor required
Pre-bias output safe
10-pin MSOP ePad package
C40℃ to +125℃ junction temperature range
MIC2166应用：
Set-top box, gateways, routers and DSL modems
Printers, scanners, graphic and video cards
Servers, PCs and processor core supply
Low-Voltage Distributed Power
图1。MIC2166方框图
The operates over a supply range of 4.5V to 28V. It has an internal linear regulator which provides a regulated 5V supply to power the internal control circuitry.
MIC2166 operates at a constant 600kHz switching frequency and can be used to drive up to 25A of output current. The output voltage is adjustable down to 0.8V.
A unique Hyper Speed Control architecture enables ultra-fast transient response while reducing the output capacitance and also makes High VIN/Low VOUT operation possible.A UVLO feature is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFET from over heating. Also, a soft-start feature is provided to reduce the inrush current. Short current sensing on the bottom MOSFET with hiccup mode operation ensures protection in case of an output short circuit. Further, the MIC2166 includes an EN pin to shut down the converter and a PGOOD pin to allow simple sequencing.
The MIC2166 is available in a 10 pin MSOP ePad package with a junction operating termperature range from C40℃ to +125℃. All support documentation can be found on
Micrel’s web site at: www.micrel.com.
MIC2166主要特性：
Hyper Speed Control architecture enables
- High delta V operation (VIN=28V and VOUT=0.8V)
- Smallest output capacitance
Built-in 5V regulator for single-supply operation
Any CapacitorTM stable
- Zero ESR to high ESR
Power-Good output
Input voltage range: 4.5V to 28V
5μA typical shutdown current
25A output current drive capability
Output down to +0.8V with ±1% accuracy
600kHz switching frequency
Internal 5ms digital soft-start
Thermal shutdown and hiccup current limit protection
No external current-sense resistor required
Pre-bias output safe
10-pin MSOP ePad package
C40℃ to +125℃ junction temperature range
MIC2166应用：
Set-top box, gateways, routers and DSL modems
Printers, scanners, graphic and video cards
Servers, PCs and processor core supply
Low-Voltage Distributed Power
图1。MIC2166方框图
