Power Management IC for SSD

RT9991

The RT9991 is a 3-CH PMIC for SSD (Solid-State Drive). It integrates 3 synchronous buck converters and one voltage detector.The RT9991 provides 3 independent enable pins for sequence control and auto discharge when powered off on the power line of a NAND Flash.The frequency can be up to 1.5MHz for Buck 1and Buck 2, and up to 2MHz for Buck 3, hence allowing the use of smaller sized inductors to meet the space and height limit in handheld applications.To maximize power utilization, the RT9991 is designed with extremely low quiescent current. The buck converter can consume down to 70μA when operating in standby mode. The RT9991 is available in a VQFN-32L 5x5 package.

Applications

1.8/2.5 inch Solid-State Drives
Portable Devices
USB-Based Hand-Held Products

Key Spec.

	RT9991
Status	EOL
Vin (min) (V)	2.8
Vin (max) (V)	5.5
Number of Channels	3
Number of Buck Converters	3
Number of Boost Converters	0
Number of Negative Outputs	0
Number of LED Drivers	0
Number of LDO Regulators	0
Application	Portable Device
Features	Enable Input;OCP
Package Type	VQFN5x5-32

Features

Supply Input Voltage Range : 2.8V to 5.5V
Buck 1 / Buck 2
   ► Adjustable Output Voltage for V_CORE or DRAM Cache
   ► Output Current up to 1A
   ► Switching Frequency : 1.5MHz
Buck 3
   ► Adjustable Output Version for NAND Flash
   ► Output Current up to 3A
   ► Switching Frequency : 2MHz
   ► Auto Discharge Function
Voltage Detector
► Programmable Threshold Voltage
► Open-Drain Reset Output
RoHS Compliant and Halogen Free