Product details

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 Rating Catalog
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 Rating Catalog
WQFN (RUK) 20 9 mm² 3 x 3
  • Complete integrated 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 × 3-mm (RUK) package
  • Complete integrated 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 × 3-mm (RUK) package

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.

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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Technical documentation

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Type Title Date
* Data sheet TPS65235 LNB Voltage Regulator With I2C Interface datasheet (Rev. D) 26 May 2021
Application note DiSEqC™ 2.x Filter Optimization 11 May 2021
Application note LNB design considerations on TPS65233, TPS65235 25 Sep 2017
Application note DiSEqC™ Protocol and LNB Voltage Regulator TPS65235 for Satellite STB/TV 14 Dec 2016
User guide TPS65235 EVM User Guide for DisEqC 2.x application 31 Dec 2015
User guide Evaluation Module for the TPS65235 LNB Voltage Regulator With I2C Interface 26 Nov 2015

Design & development

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

Evaluation board

TPS65235EVM-694 — TPS65235 LNB Voltage Regulator with I2C Interface Evaluation Module for DisEqC2.x

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 (...)
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Evaluation board

TPS65235EVM-747 — TPS65235 LNB Voltage Regulator with I2C Interface Evaluation Module for DisEqC1.x

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 (...)

In stock
Limit: 5
GUI for evaluation module (EVM)

TPS65235EVM GUI

SLVC651.ZIP (61601 KB)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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