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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 20 Vout (Min) (V) 11 Vout (Max) (V) 20 Switch current limit (Typ) (A) 3 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 0.12 Features Adjustable Current Limit, I2C, Power Good Duty cycle (Max) (%) 78 Operating temperature range (C) -40 to 85 Type Converter Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

WQFN (RUK) 20 9 mm² 3 x 3 open-in-new Find other Boost converters (integrated switch)

Features

  • Complete Integrate Solution for LNB and I2C 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
  • I2C 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

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Description

Designed for analog and digital satellite receivers, the TPS65235 is a monolithic voltage regulator with I2C 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 multi-switch box. It offers a complete solution with minimum component count, low power dissipation together with simple design and I2C standard interface.

TPS65235 features high power efficiency. The boost converter integrates a 140-mΩ power MOSFET running at 1 MHz or 500 kHz selectable switching frequency. Drop out voltage at the linear regulator is 0.8 V to minimize power loss. TPS65235 provides multiple ways to generate the 22 kHz signal. Integrated linear regulator with push-pull output stage generates 22-kHz tone signal superimposed at the output even at zero loading. Current limit of linear regulator can be programmed by external resistor with ±10% accuracy. Full range of diagnostic read by I2C is available for system monitoring.

TPS65235 supports advanced DiSEqC 2.x standard with 22-kHz tone detection circuit and output interface.

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Download

Technical documentation

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Type Title Date
* Datasheet TPS65235 LNB Voltage Regulator With I2C Interface datasheet (Rev. C) Jul. 23, 2019
Application notes LNB design considerations on TPS65233, TPS65235 Sep. 25, 2017
Application notes DiSEqC™ Protocol and LNB Voltage Regulator TPS65235 for Satellite STB/TV Dec. 14, 2016
User guides TPS65235 EVM User Guide for DisEqC 2.x application Dec. 31, 2015
User guides Evaluation Module for the TPS65235 LNB Voltage Regulator With I2C Interface Nov. 26, 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
The TPS65235EVM-694 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65235 for DisEqC2.x application. The EVM contains input and output connectors as well as control jumpers to easily evaluate the device features. Compared with TPS65235EVM-747, the (...)
Features
  • Supports  5 V, 12 V and 15 V  power bus
  • Up to 1000 mA accurate output current limit adjustable by external resistor
  • Boost switch peak current limit proportional to LDO current limit
  • Dedicated Enable Pin for Non-I2C Application
  • Boost switching frequency 1MHz/500KHz selectable
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

The TPS65235EVM-PWR747 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65235 for DisEqC1.x application. The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features. The TPS65235 is a monolithic voltage regulator (...)

Features
  • Supports 5 V, 12 V and 15 V power bus
  • Up to 1000 mA accurate output current limit adjustable by external resistor
  • Boost switch peak current limit proportional to LDO current limit
  • Dedicated Enable Pin for Non-I2C Application
  • Boost switching frequency 1MHz/500KHz selectable
GUIS FOR EVALUATION MODULES (EVM) Download
SLVC651.ZIP (61601 KB)

CAD/CAE symbols

Package Pins Download
WQFN (RUK) 20 View options

Ordering & quality

Support & training

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Videos

Power Tips: Layout for a Boost Power Stage

This video shows a simplified schematic and PCB layout for a boost converter

Posted: 21-Jan-2016
Duration: 04:31

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