A8654中文资料Wide Input Voltage, Adjustable Frequency, 3A 2MHz Synchronous Buck Regulator数据手册Allegro规格书

描述 Description

The A8654 is a high output current synchronous buck regulator that integrates low RDSON high-side and low-side N-channel MOSFETs. The A8654 incorporates PWM current mode control to provide simple compensation, excellent loop stability and fast transient response. The A8654 utilizes external compensation to accommodate a wide range of power components to achieve both excellent loop stability and desirable transient response.

The A8654 regulates nominal input voltages from 4.0 V to 36 V and remains operational when VIN drops as low as 2.6 V. When the input voltage approaches the output voltage, the duty cycle is maximized to maintain the output voltage. The A8654 is able to provide 3 A steady state load current. The A8654’s features include externally set soft-start time, external compensation network, an EN input to enable VOUT, a SYNC/FSET input to synchronize or set the PWM switching frequency, and a NPOR output validated by the output voltage.

Protection features include VIN Undervoltage Lockout (UVLO), cycle-by-cycle Over Current protection, hiccup mode short-circuit protection, Overvoltage protection, and thermal shutdown. A8654 provides open-circuit, adjacent pin short-circuit, and short-to-ground protection at every pin to satisfy the most demanding automotive and non-automotive applications.

The maximum junction temperature is 150°C. The A8654 device is available in a 16-pin eTSSOP package with exposed pads for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin lead frame plating.

Applications

Automotive Infotainment SystemsAudio, Video Navigation Systems Rear Seat Media Display Instrument Clusters TelematicsAdvanced Driver Assistance SystemsRADAR, LIDAR, mmWave Systems Vision and Detection Systems IndustrialGeneral 24 V / 36 V Applications

特性 Features

• UVLO STOP threshold is at 2.6 VTYP
• Withstands surge voltages up to 40 V
• Integrated high-side and low-side switching MOSFETs
• Synchronization capability to external clock: 100 kHz to 2.2 MHz
• External adjustable compensation network
• Pre-bias startup compatible
• Over voltage protection, cycle-by-cycle current limit, hiccup mode short circuit, and thermal protections
• Short-to-ground tolerant at every pin
• Stable with ceramic output capacitors

简介

A8654属于集成电路（IC）的稳压器-DC-DC开关稳压器。由Allegro制造生产的A8654稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。