PM8903A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

The PM8903A is a high efficiency monolithic step-down switching regulator designed to deliver up to 3 A continuous current. The IC operates from 2.8 V to 6 V input voltage (VIN).

The PM8903A features low-resistance integrated nMOS and proprietary pulse-skipping mode for optimum efficiency over all the loading range.

The voltage mode control loop allows the widest range of output filters. Current sense is internally thermally compensated for optimum precision.

The integrated 0.6 V reference allows the regulation of output voltages with ±1% accuracy over temperature variations. Switching frequency is typically set to 1.1 MHz and can be programmed to 0.8 MHz or 1.0 MHz. Out of phase synchronization allows the reduction of input RMS current.

The PM8903A provides precise dual-threshold overcurrent protection as well as over/undervoltage and overtemperature protection. PGOOD output easily provides real-time information on the output voltage.

The PM8903A is available in VFQFPN16 3 x 3 mm.

特性 Features

• Integrated 35 mΩ MOSFETs for high efficiency
• 3 A continuous output current
• 2.8 V to 6 V input voltage (VIN)
• 2.9 V to 5.5 V supply voltage (VCC)
• Adjustable output voltage down to 0.6 V
• 1% output voltage accuracy
• 1.1 MHz switching frequency operation
• PSKIP mode to optimize light load efficiency
• Embedded bootstrap diode
• Thermally compensated loss-less current sense across HS and LS MOSFETs
• OV/UV/OC and overtemperature protection
• Internal soft-start and soft-stop
• Interleaving synchronization (up to 2 ICs)
• Power Good output
• Shutdown function (

简介

PM8903A属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的PM8903A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。