Datasheet > RT8230B

RT8230B

更新时间： 2024-02-20 19:43:30

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
26页	310K
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中文翻译

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技术参数
数据手册

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RT8230B 技术参数

Status：	Active	Vs (typ) (V)：
Vin (min) (V)：	5	Vin (max) (V)：	25
Vout (min) (V)：	2	Vout (max) (V)：	5.5
Preset Vout (V)：		Output Adj. Method：	Resistor
Accuracy (+/- %)：	1	Freq (typ) (kHz)：	300;355
Freq (min) (kHz)：		Freq (max) (kHz)：
Iq (typ) (mA)：	0.15	Features：	Adjustable Current Limit;Adjustable Frequency;OCP;OVP;PSM;UVP;Ultrasonic Mode Control;Voltage Mode Control
Package Type：	WQFN3x3-20

RT8230B 数据手册

RT8230A/B/C/D/E

Dual-Channel Synchronous DC/DC Step-Down Controller

with 5V/3.3V LDOs

General Description

Features

^Maximum Duty Up to 96%

The RT8230A/B/C/D/E is a dual-channel step-down,

controller generating supply voltages for battery-powered

systems. It includes two Pulse-Width Modulation (PWM)

controllers adjustable from 2V to 5.5V, and two fixed 5V/

3.3V linear regulators. Each linear regulator provides up

to 100mA output current. The 5V linear regulator supplies

power to the PWM drivers. The RT8230A/B/C/D/E includes

on-board power-up sequencing, a power-good output,

internal soft-start, and soft-discharge output that prevents

negative voltage during shutdown.

^CCRCOT Control with 100ns Load Step Response

^Wide Input Voltage Range : 5V to 25V

^Dual Adjustable Output :

 CH1 : 2V to 5.5V

 CH2 : 2V to 4V

^Fixed 3.3V and 5V LDO Output : 100mA

^1% Accuracy on 3.3V LDO Output

^Frequency Adjustable Via TON Setting

^4700ppm/°C R_DS(ON)Current Sensing

^Adjustable Current Limit Combined with Enable

Control

A constant current ripple PWM control scheme operates

without sense resistors and provides 100ns response to

load transient. To eliminate noise in audio applications,

an ultrasonic mode is included, which maintains the

switching frequency above 25kHz. Moreover, the diode-

emulation mode maximizes efficiency for light load

applications. The RT8230A/B/C/D/E is available in the

WQFN-20L 3x3 package.

 Internal Soft-Start and Soft-Discharge

 Thermal Shutdown

 RoHS Compliant and Halogen Free

Applications

 Notebook and Sub-Notebook Computers

 2-Cell, 3-Cell and 4-Cell Li+ Battery-PoweredDevices

Simplified Application Circuit

RT8230A/B/C/D/E

VIN

UGATE2

BOOT2

ENLDO/ENC

PHASE2

LGATE2

OUT2

UGATE1

BOOT1

FB2

ENTRIP2

PHASE1

LGATE1

OUT1

ENTRIP1

LDO3

FB1

3.3V

TON

LDO5

BYP1

ENM/SECFB

PGOOD

GND

* : optional

is a registered trademark of Richtek Technology Corporation.

DS8230A/B/C/D/E-04 February 2014

www.richtek.com

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