The AOZ2151EQI-30 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 AOZ2151EQI-30 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 AOZ2151EQI-30 is available in a 3mm×3mm QFN-
18L package and is rated over a -40°C to +85°C ambient
temperature range.
aoz2151eqi-30是一種高效、易用的DC/DC同步降壓穩壓器，工作電壓28V。
該裝置可提供4A輸出電流連續可調低至0.8V±1%輸出電壓。
集成的aoz2151eqi-30從輸入產生5.3v VCC內部線性穩壓器。
如果輸入電壓低于5.3v，線性穩壓器工作在低壓降輸出模式，
使VCC電壓等于輸入電壓減去內部線性穩壓器輸出電壓的下降。
一個專有的恒定時PWM控制與輸入前饋的結果在超快速瞬態響應，
同時保持相對恒定的開關頻率在整個輸入電壓范圍內。
該器件具有多種保護功能，
如VCC欠壓鎖定，逐周期電流限制，輸出過壓保護，短路保護和熱關機。
的aoz2151eqi-30可在3mm×3mm QFN - 18l封裝，
額定在40°C + 85°C環境溫度范圍。
? 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
寬輸入電壓范圍
–至6.5V至28V
4a連續輸出電流
可調輸出電壓低至0.8V（±1%）
低RDS（ON）內部NFET
–28m?高邊
–28m?偏低
具有輸入前饋的定時常數
陶瓷電容器穩定
可調軟啟動
Power Good output
集成自舉二極管
逐周期電流限制
短路保護
熱關斷
熱增強3mm x 3mm qfn-18l包
應用
小型臺式個人電腦
顯卡
設置機頂盒
液晶電視
電纜調制解調器
負載點DC/DC轉換器
電信/網絡/數據通信設備
