Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 20 Vout (Min) (V) 13.25 Vout (Max) (V) 18.4 Switch current limit (Typ) (A) 3 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 977 Switching frequency (Max) (kHz) 1134 Iq (Typ) (mA) 0.12 Features Adjustable Current Limit, I2C, Power Good Operating temperature range (C) -40 to 125 Rating Catalog
Vin (Min) (V) 4.5 Vin (Max) (V) 20 Vout (Min) (V) 13.25 Vout (Max) (V) 18.4 Switch current limit (Typ) (A) 3 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 977 Switching frequency (Max) (kHz) 1134 Iq (Typ) (mA) 0.12 Features Adjustable Current Limit, I2C, Power Good Operating temperature range (C) -40 to 125 Rating Catalog
WQFN (RUK) 20 9 mm² 3 x 3
  • 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
  • Audible noise avoided at Forced PWM mode
  • Dedicated enable pin for non-I2C application
  • Low-dropout (LDO) regulator 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
  • Selectable over current time 29 ms / 58 ms
  • 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-Pin WQFN 3 mm × 3 mm (RUK) package
  • 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
  • Audible noise avoided at Forced PWM mode
  • Dedicated enable pin for non-I2C application
  • Low-dropout (LDO) regulator 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
  • Selectable over current time 29 ms / 58 ms
  • 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-Pin WQFN 3 mm × 3 mm (RUK) package

Designed for analog and digital satellite receivers, the TPS652353 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. The device offers a complete solution with minimum component count, low power dissipation together with simple design and I2C standard interface.

The TPS652353 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. The TPS652353 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.

The TPS652353 has a special design at Forced PWM mode to avoid the audible noise especially when VIN is higher or closer to the VLNB output.

The TPS652353 supports advanced DiSEqC 2.x standard with 22-kHz tone detection circuit and output interface.

Designed for analog and digital satellite receivers, the TPS652353 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. The device offers a complete solution with minimum component count, low power dissipation together with simple design and I2C standard interface.

The TPS652353 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. The TPS652353 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.

The TPS652353 has a special design at Forced PWM mode to avoid the audible noise especially when VIN is higher or closer to the VLNB output.

The TPS652353 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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* Data sheet TPS652353 LNB Voltage Regulator With I2C Interface datasheet (Rev. B) 26 May 2021
Application note DiSEqC™ 2.x Filter Optimization 11 May 2021

Design & development

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

Evaluation board

TPS65235-1EVM-694 — TPS65235-1 LNB Voltage Regulator With I2C Interface Evaluation Module

The TPS65235-1EVM-694 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65235-1 for DisEqC2.x applications. The EVM contains input and output connectors as well as control jumpers to easily evaluate the device features. Compared with TPS65235-1EVM-747, the (...)
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Limit: 5
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 (...)
In stock
Limit: 5
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
Simulation model

TPS65235-3 EVM Design Files

SLVMD80.ZIP (584 KB) - TINA-TI Reference Design
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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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