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LNB voltage regulator with I2C interface in FCCM mode

Inventory: 6,299
Custom reel may be available

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Packaging information

Package | Pins WQFN (RUK) | 20
Operating temperature range (℃) I (-40 to 85)
Package qty | Carrier: 3,000 | LARGE T&R
Custom reel may be available
View more packaging information

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-2-260C-1 YEAR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View


  • 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 Force 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
  • 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

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Designed for analog and digital satellite receivers, the TPS65235-1 is a monolithic voltageregulator with I2C interface; specifically to provide the 13-V to 18-Vpower supply and the 22-kHz tone signal to the LNB down converter in the antenna dish or to themulti-switch box. The device offers a complete solution with minimum component count, low powerdissipation together with simple design and I2C standardinterface.

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

The TPS65235-1 hasa special design at FCCM mode to avoid the audible noise especially when VIN is higher or closer tothe VLNB output.

The TPS65235-1supports advanced DiSEqC 2.x standard with 22-kHz tone detection circuit and outputinterface.

Qty Price
1-99 $1.78
100-249 $1.56
250-999 $1.09
1,000+ $0.88

Alternative carriers

Part number TPS65235-1RUKT
Package qty | Carrier 250 | SMALL T&R
Inventory 4,703
Qty | Price (USD) 1ku | $1.01