The A8651 is an adjustable-frequency, high-output current PWM regulator that integrates a high-end P-channel MOSFET with a low-end N-channel MOSFET. The A8651 integrates current-mode control to provide simple compensation, excellent loop stability, and fast transient response. The A8651 utilizes external compensation to be compatible with a wide range of power components to optimize transient response without compromising stability. The A8651 is adjustable from 2.5 to 5.5 V input voltage, providing output voltages as low as 0.8 V and load currents of at least 2 A.
A8651 features include externally adjustable and synchronized switching frequencies, an externally set soft-start time to minimize ingress current, independent EN inputs, and independent NPOR outputs with a delay of 7.5 ms. The A8651 control circuit operates below 5 μA in sleep mode.
Protection features include VIN Undervoltage Lockout (UVLO), Pulse-by-Pulse Overcurrent Protection (OCP), Hiccup Mode Short Circuit Protection (HIC), Overvoltage Protection (OVP), and Overtemperature Shutdown (TSD). In addition, the A8651 offers open and adjacent pin short-circuit protection, ground short-circuit protection for each pin, to meet the most demanding automotive applications.
The A8651 is available in a 20-pin TSSOP package (suffix LP) and is fitted with an exposed heatsink for improved thermal functionality. The package is a lead-free (Pb) package with 100% matte tin plating on the pin frame.
apply
-
GPS/车用资讯娱乐系统
-
汽车音频
-
家庭音频
-
网络和电信
-
-
AEC-Q100 标准认证
-
工作电压范围：2.5 至 5.5 V
-
UVLO 停止阈值：2.25 V （最大值）
-
每调节器有两路输出，每路的输出电流高达 2 A
-
可调输出电压低至 0.8 V
-
内部 80 mΩ 高端开关 MOSFET
-
内部 55 mΩ 低端开关 MOSFET
-
可调开关频率 (fSW)：0.35 至 2.2 MHz
-
同步到外部时钟：1.2 × 至 1.5 × fOSC
-
180° 相移（开关稳压器时）
-
睡眠模式的供给电流低于 5 μA
-
通过 SS 针脚从外部设置软启动时间
-
能够实现预偏置启动
-
外部可调补偿
-
兼容陶瓷输出电容器
-
独立启动输入和 NPOR 输出针脚
-
针对每个稳压器的可调电流限制 (OCP)
-
打嗝模式短路保护 (HIC)
-
过压和过温保护
-
开路和相邻针脚短路耐受
-
每个针脚的接地短路耐受