A8499数据手册集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF

描述 Description

DISCONTINUED: These parts are discontinued.  Samples are no longer available. For new customers or new applications, please contact Allegro. Date of status change: June 2, 2015.

Recommended Substitutions: For existing customer transition, and for new customers or new applications, refer to the A4447SLJTR-T.

The A8499 is a step-down regulator that will handle a wide input of operating voltage ranges. It is a fixed off-time current-mode-controlled buck regulator. The regulator requires an external clamping diode, inductor and filter capacitor. The off time is determined by an external resistor.

It will operate in both continuous and discontinuous modes. An internal blanking circuit will be used to filter out transients due to the reverse recovery of the external clamp diode. Typical blanking time is 200 nS.

The output voltage is adjustable from 1.2 V to 24 V based on a resistor divider and the 1.2 V 3 percent reference.

Applications include:

Applications with 8 to 50 V input voltage range needing buck regulator for 1.5 A output current Consumer equipment power Uninterruptible power supplies (lead acid battery charger) Automotive: 9 to 16 V input, with higher voltage protection 12 V lighter-powered applications (portable DVD, etc.) Point of Sale (POS) applications Industrial applications with 24 V or 36 V bus  

特性 Features

• 8-50 V input range
• Integrated DMOS switch
• Flat efficiency curve across output current
• 1.5 A output in standard SOIC-8 package
• Low shutdown current
• Low cost

简介

A8499属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的A8499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。