PM6670S Complete DDR 2/3 memory power supply controller

The device PM6670S 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.

The 2 Apk sink/source linear regulator provides the memory termination voltage with fast load transient response.

The device is fully compliant with system sleep states S3 and S4/S5, providing LDO output high impedance in suspend-to-RAM and tracking discharge of all outputs in suspend-to-disk

技术特性

Switching section (VDDQ)
- 4.5 V to 28 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 MOSFET’s 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

功能框图

PM6670S 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
PM6670STR	Active		1000	VFQFPN 24 4x4x1.0	Tape And Reel
PM6670S	Active		1000	VFQFPN 24 4x4x1.0	Tube

DATASHEET

描述	版本	大小
PM6670S : Complete DDR2/3 memory power supply controller	4	743KB

APPLICATION NOTES

描述	版本	大小
AN2808: Complete DDR2/3 memory power supply controller	1	3034KB

BOARDS AND TOOLS

型号	描述
STEVAL-ISA051V1	Complete DDR2/3 memory power supply controller evaluation board based on the PM6670S