深圳市中立信电子科技有限公司

1 Features

1• Complete Integrate Solution for LNB and I

2C

Interface

• DiSEqC 2.x, and DiSEqC 1.x Compatible

• Supports 5-V, 12-V and 15-V Power Rail

• Up to 1000 mA Accurate Output Current Limit

Adjustable by External Resistor

• Boost Switch Peak Current Limit Proportional to

LDO Current Limit

• Boost Converter with 140-mΩ Low Rds(on) Internal

Power Switch

• Boost Switching Frequency 1-MHz or 500-kHz

Selectable

• Dedicated Enable Pin for Non-I2C Application

• Low Drop Output LDO With Push-pull Output

Stage for VLNB Output

• Built-in Accurate 22-kHz Tone Generator and

External Tone Input Support

• Supports Both External 44-kHz and 22-kHz Tone

Input

• Adjustable Soft-start and 13-V to 18-V Voltage

Transition Time

• 650 mV to 750-mV, 22-kHz Tone Amplitude

Selection

• I

2C Registers Accessible with EN Low

• Short Circuit Dynamic Protection

• Diagnostics for Output Voltage Level, DiSEqC

Tone Input and Output, Current Level, and Cable

Connection

• Thermal Protection Available

• 20-Lead WQFN 3-mm x 3-mm (RUK) Package

2 Applications

• Set Top Box Satellite Receiver

• TV Satellite Receiver

• PC card Satellite Receiver

• Satellite TV

3 Description

Designed for analog and digital satellite receivers, the

TPS65235 is a monolithic voltage regulator with I

2C

interface; specifically to provide the 13-V to 18-V

power supply and the 22-kHz tone signal to the LNB

down converter in the antenna dish or to the multiswitch

box. 
TPS65235RUKRTPS65235RUKRTPS65235RUKRTPS65235RUKR

1功能

•LNB和I的完整集成解决方案

2摄氏度

接口

•DiSEqC 2。x，和disqc 1。x兼容

•支持5-V、12-V和15-V电轨

输出电流限制为1000毫安

外接电阻器可调

•按比例增加开关峰值电流限制

LDO限流

•提高转换器140 - mΩ低Rds()内部

电源开关

•提高开关频率1 mhz或500 khz

可选择的

•非i2c应用程序专用的启用Pin

•低跌落输出LDO与推挽输出

VLNB输出的阶段

内置22khz音频发生器和

外音输入支架

•支持外部44-kHz和22-kHz音调

输入

•可调软启动和13-V至18 v电压

过渡时间

•650 mV到750-mV, 22 khz音调振幅

选择

•我

2C寄存器可通过EN Low访问

•短路动态保护

•诊断输出电压水平，疾病

音频输入和输出，电流水平，和电缆

连接

•可提供热保护

•20铅WQFN 3毫米x3毫米(RUK)包装

2应用程序

•设置顶盒卫星接收器

•电视卫星接收器

•PC卡卫星接收器

•卫星电视

3描述

设计用于模拟和数字卫星接收器

TPS65235是I型单片稳压器

2摄氏度

接口;专门提供13-V到18-V

电源和22khz音频信号到LNB

下变频器在天线盘或多开关

盒子。