The AOZ2151QI-10 is a high-efficiency, easy-to-use DC/
DC synchronous buck regulator that operates up to 28V.
The device is capable of supplying 4A of continuous
output current with an output voltage adjustable down to
0.8V ±1%.
The AOZ2151QI-10 integrates an internal linear regulator
to generate 5.3V VCC from input. If input voltage is lower
than 5.3V, the linear regulator operates at low drop
output mode, which allows the VCC voltage is equal to
input voltage minus the drop-output voltage of the
internal linear regulator.
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 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 AOZ2151QI-10 is available in a 3mm×3mm QFN-
18L package and is rated over a -40°C to +85°C ambient
temperature range.
aoz2151qi-10是一种高效、易用的DC/DC同步降压稳压器，工作电压28V。
该装置可提供4A输出电流连续可调低至0.8V±1%输出电压。
集成的aoz2151qi-10从输入产生5.3v VCC内部线性稳压器。
如果输入电压低于5.3v，线性稳压器工作在低压降输出模式，
使VCC电压等于输入电压减去内部线性稳压器输出电压的下降。
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。
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。
aoz2151qi-10可在3mm×3mm QFN - 18l封装，额定在40°C + 85°C环境温度范围
Wide input voltage range
– 6.5V to 28V
4A continuous output current
Output voltage adjustable down to 0.8V (±1.0%)
Low RDS(ON) internal NFETs
– 28m high-side
– 28m low-side
Constant On-Time with input feed-forward
Ceramic capacitor stable
Adjustable soft start
Power Good output
Integrated bootstrap diode
Cycle-by-cycle current limit
Short-circuit protection
Thermal shutdown
Thermally enhanced 3mm x 3mm QFN-18L package
Applications
Compact desktop PCs
Graphics cards
Set-top boxes
LCD TVs
Cable modems
Point-of-load DC/DC converters
Telecom/Networking/Datacom equipment
宽输入电压范围
–至6.5V至28V
4a连续输出电流
可调输出电压低至0.8V（±1%）
低RDS（ON）内部NFET
–28m高边
–28m偏低
具有输入前馈的定时常数
陶瓷电容器稳定
可调软启动
Power Good output
集成自举二极管
逐周期电流限制
短路保护
热关断
热增强3mm x 3mm qfn-18L封装
应用
小型台式个人电脑
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
