Datasheet > RT9641AGS

RT9641AGS

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
立锜 - RICHTEK		控制器
页数	文件大小	规格书
11页	231K
描述
Triple Linear Regulator Controller Support ACPI Control Interface

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RT9641AGS 数据手册

RT9641A/B

this pin to the gate of a suitable N-MOS transistor or the

base of a suitable NPN transistor.

Operational Truth Tables

The EN3VDL and EN5VDL pins offer a host of choices in

terms of the overall system architecture and supported

features. Tables 1~3 describe the truth combinations

pertaining to each of the three outputs.

VSEN2 (Pin 16)

Connect this pin to the memory output (V_OUT2). In sleep

states, this pin is regulated to 2.5V(2.6V) or 3.3V(3.43V)

(based on R_SEL) through an internal pass transistor

capable of delivering 300mA (Typically). The active-state

voltage at this pin is regulated through an external NPN

or NMOS transistor connected at the DRV2 pin for both

2.5V(2.6V) and 3.3V(3.43V) setting. During all operating

states, the voltage at this pin is monitored for under-voltage

events.

Table 1. 3.3V_DUALOutput (V_OUT1) Truth Table

EN3VDL S5 S3 3V3DL

Comments

3.3V S0, S1 States (Active)

3.3V S3

Note Maintains Previous State

3.3V S4/S5

Application Information

3.3V S0, S1 States (Active)

3.3V S3

Operation

The RT9641A/B controls 3 output voltages. It is designed

for microprocessor computer applications with 3.3V, 5V,

5VSB, and 12V outputs from anATX power supply. The IC

is composed of two linear controllers supplying the PCI

slots' 3.3V_AUXpower (3.3V_DUAL, V_OUT1) and the 2.5V

RDRAM or 3.3V SDRAM memory power (2.5V/3.3V

(2.6V/3.43V) V_MEM, V_OUT2), and a dual switch controller

supplying the 5V_DUALvoltage (V_OUT3). In addition, all the

control and monitoring functions necessary for complete

ACPI implementation are integrated into the RT9641A/B.

Note Maintains Previous State

S4/S5

Note: Combination not allowed.

As seen in Table 1, EN3VDLsimply controls whether the

3.3V_DUALplane remains powered up during S4/S5 sleep

state.

Table 2. 5VDUAL Output (V_OUT3) Truth Table

EN5VDL S5 S3 5VDL

Comments

S0, S1 States(Active)

Initialization

The RT9641A/B automatically initializes upon receipt of

input power. The Power-On Reset (POR) function

continually monitors the 5VSB input supply voltage,

initiating soft-start operation after it exceeds its POR

threshold (in S4/S5 states). The 5VSB POR trip event is

also used to lock in the memory voltage setting based on

Note Maintains Previous State

S4/S5

S0, S1 States(Active)

Note Maintains Previous State

5V S4/S5

R_SEL

The RT9641A/B forces the operation mode to start from

S4/S5 states at POR releasing with 3.3V_DUALand 5V_DUAL

voltages under control of EN3VDL and EN5VDL input

signals.

Note: Combination not allowed.

Very similarly, Table 2 details the fact that EN5VDL status

controls whether the 5V_DUALplane supports sleeps states.

DS9641A/B-11 March 2007

www.richtek.com

1...4 5 678 9 10 11

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与RT9641AGS相关器件

型号	品牌	描述	获取价格	数据表
RT9641APS	RICHTEK	Triple Linear Regulator Controller Support ACPI Control Interface	获取价格
RT9641B	ETC	Triple Linear Regulator Controller Support ACPI Control Interface	获取价格
RT9641BCS2	RICHTEK	TRIPLE LINEAR REGULATOR CONTROLLER SUPPORT	获取价格
RT9641BGS	RICHTEK	Triple Linear Regulator Controller Support ACPI Control Interface	获取价格
RT9641BPS	RICHTEK	Triple Linear Regulator Controller Support ACPI Control Interface	获取价格
RT9643	RICHTEK	5 Channel ACPI Regulator with Step-Down DC/DC Controller	获取价格

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