PM8903中文资料3 A step-down monolithic switching regulator数据手册ST规格书

描述 Description

The PM8903 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 PM8903 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 filter. 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 PM8903 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 PM8903 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 (<15 μA quiescent current)
VFQFPN16 3 x 3 mm compact package

简介

PM8903属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的PM8903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。