Datasheet > RT8241A

RT8241A

更新时间： 2024-01-19 13:00:59

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
16页	209K
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RT8241A 技术参数

Status：	Active	Vs (typ) (V)：	5
Vin (min) (V)：	4.5	Vin (max) (V)：	26
Vout (min) (V)：	0.675	Vout (max) (V)：	3.3
Preset Vout (V)：		Output Adj. Method：	Digital;Resistor
Accuracy (+/- %)：	1	Freq (typ) (kHz)：	300.0
Freq (min) (kHz)：		Freq (max) (kHz)：
Iq (typ) (mA)：	0.5	Features：	Adjustable Current Limit;Built-in Bootstrap Switch;COT Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;OVP;PSM;Power Good;SCP;UVP
Package Type：	WQFN2x2-12	Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS8241-04.pdf

RT8241A 数据手册

RT8241

High Efficiency Single Synchronous Buck PWM Controller

General Description

Features

 Meet Intel VCCSA Voltage Slew Rate

 Built-in 1% Reference Voltage

 2-Bit Programmable Output Voltage with Integrated

Transition Support

The RT8241 PWM controller provides high efficiency,

excellent transient response, and highDC output accuracy

needed for stepping down high voltage batteries to

generate low voltage CPU core, I/O, and chipset RAM

supplies in notebook computers.

 Quick Load-Step Response within 100ns

 4700ppm/°C Programmable Current Limit by Low

Side R_DS(ON)Sensing

The RT8241 supports on chip voltage programming function

between 0.675V and 0.9V by controllingGX digital inputs.

 4.5V to 26V Battery Input Range

 Internal Ramp Current Limit Soft-Start Control

 Drives Large Synchronous Rectifier FETs

 Integrated Boost Switch

The constant-on-time PWM control scheme handles wide

input/output voltage ratios with ease and provides 100ns

“instant-on” response to load transients while maintaining

a relatively constant switching frequency.

 Over/Under Voltage Protection

 Thermal Shutdown

The RT8241 achieves high efficiency at a reduced cost

by eliminating the current-sense resistor found in

traditional current-mode PWMs. Efficiency is further

enhanced by its ability to drive very large synchronous

rectifier MOSFETs and enter diode emulation mode at

light load condition. The buck conversion allows this device

to directly step down high voltage batteries at the highest

possible efficiency. The RT8241 is intended for CPU core,

chipset, DRAM, or other low voltage supplies as low as

0.675V.

 Power Good Indicator

 RoHS Compliant and Halogen Free

Applications

 Notebook Computers

 CPU/GPU Core Supply

 Chipset/RAM Supply

 GenericDC/DC Power Regulator

Pin Configuration

The RT8241 is available in a WQFN-12L 2x2 package.

(TOP VIEW)

Ordering Information

RT8241

12 11 10

Package Type

LGATE

PGOOD

QW : WQFN-12L 2x2 (W-Type)

GND

PHASE

UGATE

Lead Plating System

G : Green (Halogen Free and Pb Free)

Z : ECO (Ecological Element with

Halogen Free and Pb free)

Switching Frequency Operation

A : 300kHz

Note :

WQFN-12L 2x2

Richtek products are :

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

 Suitable for use in SnPb or Pb-free soldering processes.

is a registered trademark of Richtek Technology Corporation.

DS8241-04 October 2017

www.richtek.com

12 3 4 5 6 7...16

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