Datasheet > RT4805A

RT4805A

更新时间： 2024-01-04 01:39:00

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
22页	1412K
描述
暂无描述

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

RT4805A 技术参数

Status：	Active	Vin (min) (V)：	1.8
Vin (max) (V)：	5	Vout (min) (V)：	2.85
Vout (max) (V)：	4.4	Output Adj. Method：	Digital
Iq (typ) (mA)：	0.055	SW Current Limit (typ) (A)：	4
Freq (typ) (kHz)：	2500	Freq (min) (kHz)：	2000
Freq (max) (kHz)：	3000	Ron (typ) (Ohm)：	0.04;0.06
Features：	Adjustable Current Limit;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Internal Compensation;OCP;OVP;Power Good;UVP	Package Type：	WL-CSP1.67x1.67-16(BSC)
Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS4805A-02.pdf

RT4805A 数据手册

RT4805A

2.5MHz, Synchronous Boost Regulator with Bypass Mode

Features

General Description

 4 Few External Components : 0.47H Inductor

and 0603 Case Size Input and Output Capacitors

 Input Voltage Range : 1.8V to 5V

 Output Range from 2.85V to 4.4V

 VSEL = L 3.6V

The RT4805A allows systems to take advantage of

new battery chemistries that can supply significant

energy when the battery voltage is lower than the

required voltage for system power ICs. By combining

built-in power transistors, synchronous rectification,

and low supply current; this IC provides a compact

solution for systems using advanced Li-Ion battery

chemistries.

 VSEL = H 3.7V

 Maximum Continuous Load Current : 2A at V_IN

2.65V Boosting V_OUTto 3.35V

 Up to 96% Efficient

The RT4805A is a boost regulator designed to provide

a minimum output voltage from a single-cell Li-Ion

battery, even when the battery voltage is below system

minimum. In boost mode, output voltage regulation is

guaranteed to a maximum load current of 2A.

Quiescent current in Shutdown Mode is less than 1A,

which maximizes battery life. The regulator transitions

smoothly between Bypass and normal Boost Mode.

The device can be forced into Bypass Mode to reduce

quiescent current.

 True Bypass Operation when V_IN> Target V_OUT

 Internal Synchronous Rectifier

 True Load Disconnect when Shut Down

 Forced Bypass Mode

 V_SELControl to Optimize Target V_OUT

 Short-Circuit Protection

 I²C Controlled Interface

 Ultra low Operating Quiescent Current

 Small WL-CSP 16B Package

The RT4805A is available in the WL-CSP-16B

1.67x1.67 (BSC) package.

Applications

 Single-Cell Li-Ion, LiFePO4 Smart-Phones or Tablet

 2.5G/3G/4G Mini-Module Data Cards

Simplified Application Circuit

RT4805A

VOUT

VIN

OUT

To pull high voltage

VSEL

nBYP

PGOOD

SDA

SCL

AGND PGND

is a registered trademark of Richtek Technology Corporation.

DS4805A-02 April 2017

www.richtek.com

12 3 4 5 6 7...22

下载PDF

与RT4805A相关器件

型号	品牌	描述	获取价格	数据表
RT4805B	RICHTEK	暂无描述	获取价格
RT4805WSC	RICHTEK	IC BOOST 2.5MHZ WL-CSP-16	获取价格
RT4809	RICHTEK	DC-DC Boost Converter for PWM Controller	获取价格
RT4812	RICHTEK	暂无描述	获取价格
RT4813	RICHTEK	暂无描述	获取价格
RT4813A	RICHTEK	暂无描述	获取价格