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TheAOZ2261QI-15isahigh-efficiency,easy-to-useDC/DCsynchronousbuckregulatorthatoperatesupto28V
The AOZ2261QI-15 is a high-efficiency, easy-to-use DC/
DC synchronous buck regulator that operates up to 28V.
The device is capable of supplying 8A of continuous
output current with an output voltage adjustable down to
0.8V (±1.0%).
A proprietary constant on-time PWM control with input
feed-forward results in ultra-fast transient response while
maintaining relatively constant switching frequency over
the entire input voltage range. The on-time can be
externally programmed up to 2.6μs.
The device features multiple protection functions such as
VCC under-voltage lockout, cycle-by-cycle current limit,
output over-voltage protection, short-circuit protection,
and thermal shutdown.
The AOZ2261QI-15 is available in a 4mm x 4mm QFN-
22L package and is rated over a -40°C to +85°C ambient
temperature range.
AOZ2261QI-15是一种高效、易用的DC/DC同步降压稳压器,工作电压28V。
该装置能够提供8A输出电流连续可调输出电压低至0.8V(±1%)。
一个专有的恒定时PWM控制与输入前馈的结果在超快速瞬态响应,
同时保持相对恒定的开关频率在整个输入电压范围内。
定时可以在外部编程到2.6微米。
该器件具有多种保护功能,
如VCC欠压锁定,逐周期电流限制,输出过压保护,短路保护和热关机。
AOZ2261QI-15可在一个4mm x 4mm QFN - 22l封装,额定在40°C + 85°C环境温度范围。
Wide input voltage range
– 2.7V to 28V
8A continuous output current
Output voltage adjustable down to 0.8V (±1.0%)
Low RDS(ON) internal NFETs
– 26mΩ high-side
– 12mΩ low-side
Constant On-Time with input feed-forward
Programmable on-time up to 2.6μs
Selectable PFM light load operation
Ceramic capacitor stable
Adjustable soft start
Ripple reduction
Power Good output
Integrated bootstrap diode
Cycle-by-cycle current limit
Short-circuit protection
Over-voltage protection
Thermal shutdown
Thermally enhanced 4mm x 4mm QFN-22L package
Applications
Portable computers
Compact desktop PCs
Servers
Graphics cards
Set-top boxes
LCD TVs
Cable modems
Point-of-load DC/DC converters
Telecom/Networking/Datacom equipment
输入电压范围
–2.7V至28V
8a连续输出电流
可调输出电压低至0.8V(±1%)
低RDS(ON)内部NFET
–26mΩ高边
–12mΩ偏低
具有输入前馈的定时常数
可编程时高达2.6微米
可选择PFM轻负载操作
陶瓷电容器稳定
可调软启动
脉动
电源输出良好
集成自举二极管
逐周期电流限制
短路保护
过压保护
热关断
热增强的4mm x 4mm qfn-22l包
应用
便携式计算机
小型台式个人电脑
服务器
显卡
设置机顶盒
液晶电视
电缆调制解调器
负载点DC/DC转换器
电信/网络/数据通信设备
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