PM6670AS集成电路（IC）的电源管理-专用规格书PDF中文资料

PM6670AS属于集成电路（IC）的电源管理-专用。由意法半导体集团制造生产的PM6670AS电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。

描述 Description

The device PM6670AS is a complete DDR2/3 power supply regulator designed to meet JEDEC specifications.

It integrates a constant on-time (COT) buck controller, a 2 Apk sink/source low drop out regulator and a 15 mA low noise buffered reference.

The COT architecture assures fast transient response supporting both electrolytic and ceramic output capacitors. An embedded integrator control loop compensates the DC voltage error due to the output ripple.

特性 Features

■ Switching section (VDDQ)

– 4.5 V to 36 V input voltage range

– 0.9 V, ±1 voltage reference

– 1.8 V (DDR2) or 1.5 V (DDR3) fixed output voltages

– 0.9 V to 2.6 V adjustable output voltage

– 1.237 V ±1 reference voltage available

– Very fast load transient response using constant-on-time control loop

– No RSENSE current sensing using low side MOSFETs RDS(ON)

– Negative current limit

– Latched OVP and UVP

– Soft-start internally fixed at 3 ms

– Selectable pulse skipping at light load

– selectable no-audible (33 kHz) pulse skip mode

– Ceramic output capacitors supported

– Output voltage ripple compensation

■ VTT LDO and VTTREF

– 2 Apk LDO with foldback for VTT

– Remote VTT sensing

– High-Z VTT output in S3

– Ceramic output capacitors supported

– ±15 mA Low noise buffered reference

Applications

■ DDR2/3 memory supply

■ Digital TV system

■ SSTL18, SSTL15 and HSTL bus termination