Datasheet > RT8127

RT8127

更新时间： 2024-09-23 19:52:31

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
22页	372K
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RT8127 技术参数

Status：	Active	Vs (typ) (V)：	5
Vin (min) (V)：	4.5	Vin (max) (V)：	26
Vout (min) (V)：	0.8	Vout (max) (V)：	5
Preset Vout (V)：		Output Adj. Method：	Resistor
Accuracy (+/- %)：	1	Freq (typ) (kHz)：	300;350;400;600
Freq (min) (kHz)：		Freq (max) (kHz)：
Iq (typ) (mA)：	2	Features：	Adjustable Frequency;Adjustable Soft-Start;Built-in Bootstrap Switch;DCR Current Sense;Diode Emulation Mode;OCP;OVP;Power Good;SCP;Selectable (PSM or PWM);UVP;Ultrasonic Mode Control;Voltage Mode Control
Package Type：	WQFN4x4-28

RT8127 数据手册

RT8127

High Efficiency Dual-Channel Output Synchronous Buck PWM

Controller with Phase Interleaving and Two LDO Regulators

General Description

Features

z Green Voltage Mode (GVM^TM) Control

The RT8127 is a high efficiency Dual-Channel output

synchronous Buck PWM controller with integrated

MOSFET drivers and two LDOs. This part featuresGreen

Voltage Mode (GVM^TM) control, which is specifically

designed to improve efficiency at light load condition. At

light load condition, the RT8127 is pin configurable to

automatically operate in diode emulation mode with

constant on-time PFM to reduce switching frequency so

as to improve conversion efficiency. As the load current

increases, the RT8127 leaves the diode emulation mode

and operates in Continuous Conduction Mode (CCM) with

fixed-frequency, 180° out of phase interleaved PWM to

reduce input capacitance. The RT8127 supports 4.5V to

26V input voltage range and has integrated 5V LDO which

supplies the internal gate drivers as well as the controller.

When channel 1 Buck regulator output voltage is higher

than 5V, the supply voltage will be automatically switched

to the Buck regulator output from the integrated 5V LDO.

The RT8127 supports enable/disable function for each

channel and also features external soft-start, adjustable

switching frequency and power good indication. This device

utilizes lossless inductor DCR current sensing for over

current protection. Other protections include over voltage,

under voltage, thermal shutdown and under voltage

lockout.

z High Light Load Efficiency

z Audio-Skip Mode (ASM) at Light Load

z Pin Configurable CCM/DEM Operation

z 180° Interleaving PWM in CCM Operation

z Support 4.5V to 26V Input Voltage Range

z Integrated 5V MOSFET Driver and Bootstrap Circuit

z Integrated 5V and 12V LDO

z Enable Control for Each Channel

z External/Internal Soft-Start

z Programmable LGATE PWM Frequency Setting

(LGFS)

z Automatic Switchable 5V Regulator

z Power Good Indication

z VIN Feed-Forward in Control Loop

z Lossless DCR Current Sensing

z OVP, UVP, OCP, Thermal Shutdown and UVLO

z Small 28-Lead WQFN Package

z RoHS Compliant and Halogen Free

Applications

z Motherboard, Server,Graphic Card

z System Power Supplies

z Power Module

Marking Information

The RT8127 is available in a WQFN-28L4x4 small footprint

package.

0H= : Product Code

YMDNN : Date Code

0H=YM

DNN

Simplified Application Circuit

RT8127

VIN

UGATE2

PHASE2

LGATE2

UGATE1

PHASE1

LGATE1

1.4µH

OUT2

OUT1

942µF

CSP2

CSN2

CSP1

CSN1

EN1/SS1

EN2/SS2

12VLDO

12V/3.3V

GND

is a registered trademark of Richtek Technology Corporation.

DS8127-05 June 2014

www.richtek.com

12 3 4 5 6 7...22

中文翻译

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与RT8127相关器件

型号	品牌	获取价格	描述	数据表
RT8127A	RICHTEK	获取价格	暂无描述
RT8128A	RICHTEK	获取价格	暂无描述
RT8128AGSP	RICHTEK	获取价格	High Efficiency Synchronous Buck PWM Controller
RT8128C	RICHTEK	获取价格	暂无描述
RT8128CGSP	RICHTEK	获取价格	High Efficiency Synchronous Buck PWM Controller
RT8129A	RICHTEK	获取价格	暂无描述
RT8129AG	RICHTEK	获取价格	High Efficiency Single Synchronous Buck PWM Controller
RT8129AQW	RICHTEK	获取价格	High Efficiency Single Synchronous Buck PWM Controller
RT8129B	RICHTEK	获取价格	High Efficiency Single Synchronous Buck PWM Controller
RT8130A	RICHTEK	获取价格	暂无描述

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