TPS65233-1 Datasheet, PDF (1/31 Pages) Texas Instruments – LNB Voltage Regulator

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TPS65233-1
SLVSD66 – SEPTEMBER 2015
TPS65233-1 LNB Voltage Regulator With I²C Interface
1 Features
•1 Complete Integration Solution for LNB and I²C
• DiSEqC 1.x Compatible
• Supports 9-V and 12-V Power Bus
• Up to 1000-mA Accurate Output Current Limit
Adjustable by External Resistor and I²C
• Boost Converter With Low R_dson Internal Power
Switch
• Dedicated Enable Pin for Non-I²C Application
• Low Noise, Low Drop Output With Push-Pull
Output Stage
• Built-In Accurate 22-kHz Tone Generator or
External Pin
• Adjustable Soft-Start and 13-V/18-V Voltage
Transition Time
• Compliant With Main Satellite Receiver Systems
Specifications
• LNB Short Circuit Dynamic Protection
• Diagnostics for Output Voltage Level, Input Supply
UVLO, and DiSEqC Tone Output
• Cable Disconnect Diagnostic
• Available in a 16-Pin WQFN 3.00-mm × 3.00-mm
(RTE) Package
2 Applications
• Set-Top Box Satellite Receiver
• TV Satellite Receiver
• PC Card Satellite Receiver
3 Description
Designed for analog and digital satellite receivers, the
TPS65233-1 is a monolithic voltage regulator with I²C
interface, specifically to provide the 13-V/18-V power
supply and the 22-kHz tone signaling to the LNB
down-converter in the antenna dish or to the multi-
switch box. It offers a complete solution with very low
component count, low power dissipation together with
simple design and I²C standard interfacing.
TPS65233-1 features high power efficiency. The
boost converter integrates a 120-mΩ power MOSFET
running at 1-MHz switching frequency. Drop out
voltage at the linear regulator is 0.8 V to minimize
power loss. TPS65233-1 provides multiple ways to
generate the 22-kHz signal. Integrated linear
regulator with push-pull output stage generates clean
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 part is available in a 16-pin WQFN 3.00-mm ×
3.00-mm (RTE) package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS65233-1
WQFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
12
11
10
9
VOUT
100 nF
2 × 22 µF
(35 V)
13 VLNB
14 VCP
1 µF
15 BOOST
16 PGND
FAULT 8
100 k
TPS65233-1
EN/ADDR 7
ISEL 6
130 k
TCAP 5
22 nF
VIN
22 µF
(25 V)
4.7 µH
1
2
3
4
1 µF
1 µF
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.