The AOZ1267-01 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%).
The AOZ1267-01 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 dropoutput
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 switching frequency
can be externally programmed up to 1MHz.
The device features multiple protection functions such as
VCC under-voltage lockout, cycle-by-cycle current limit,
output over-voltage protection, short-circuit protection, as
well as thermal shutdown.
The AOZ1267-01 is available in a 4mm x 4mm QFN-23L
package and is rated over a -40°C to +85°C ambient
temperature range.
aoz1267-01是一種高效、易用的DC/DC同步降壓穩壓器，工作電壓28V。
該裝置能提供8A輸出電流連續可調輸出電壓低至0.8V（±1%）。
集成的aoz1267-01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，線性穩壓器在低dropoutput模式，
它允許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。
開關頻率高達1MHz可外部程序。
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，以及熱關機。
aoz1267-01可在一個4mm x 4mm qfn-23l封裝，額定在40°C + 85°C環境溫度范圍。
制造商零件編號：AOZ1267QI-01
制造商：Alpha & Omega Semiconductor Inc
描述：IC REG BUCK SYNC ADJ 8A QFN
系列：EZBuck?
類型：降壓（降壓）
輸出類型：可調式
輸出數：1
電壓 - 輸出：0.8 V ~ 23.8 V
電壓 - 輸入：2.7 V ~ 28 V
頻率 - 開關：200kHz ~ 1MHz
電流 - 輸出：8A
同步整流器：是
工作溫度：-40°C ~ 85°C
安裝類型：表面貼裝
封裝/外殼：23-VFQFN 裸露焊盤
供應商器件封裝：23-QFN （4x4）
? 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
– 35m? high-side
– 12m? low-side
? Constant On-Time with input feed-forward
? Programmable frequency up to 1MHz
? Selectable PFM light load operation
? Ceramic capacitor stable
? Adjustable soft start
? Power Good output
? Integrated bootstrap diode
? Cycle-by-cycle current limit
? Short-circuit protection
? Thermal shutdown
? Thermally enhanced 4mm x 4mm QFN-23L 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
寬輸入電壓范圍
–2.7V至28V
8a連續輸出電流
可調輸出電壓低至0.8V（±1%）
低RDS（ON）內部NFET
–35m?高邊
–12m?偏低
具有輸入前饋的定時常數
可編程頻率高達1MHz
可選擇PFM輕負載操作
陶瓷電容器穩定
可調軟啟動
電源輸出良好
集成自舉二極管
逐周期電流限制
短路保護
熱關斷
熱增強的4mm x 4mm qfn-23l包
應用
便攜式計算機
小型臺式個人電腦
服務器
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
