Supply Controller. RT5007 Datasheet

RT5007 Controller. Datasheet pdf. Equivalent

RT5007 Datasheet
Recommendation RT5007 Datasheet
Part RT5007
Description Single Output LNB Power Supply Controller
Feature RT5007; ® RT5007 Single Output LNB Power Supply Controller with I2C Interface General Description The RT50.
Manufacture Richtek
Datasheet
Download RT5007 Datasheet




Richtek RT5007
®
RT5007
Single Output LNB Power Supply Controller with I2C Interface
General Description
The RT5007 is a highly integrated voltage regulator and
interface IC, specifically designed for supplying power and
control signals from advanced satellite Set-Top Box (STB)
modules to the Low Noise Block (LNB) down converter in
the antenna dish or to the multi-switch box.
The device consists of an independent current-mode Boost
controller and low a dropout linear regulator and the circuitry
required for 22kHz tone generation to support one-way
DiSEqCTM communications.
All the functions and the LNB output voltages (8
programmable levels) can be controlled via the I2C bus.
The RT5007 has fault signal to serve as an interrupt for
the processor when any condition turns off the LNB
controller (over current, over temperature and under voltage
lockout). The states of these flags to the faults can be
thoroughly examined through the I2C registers.
Features
Wide Input Supply Voltage Range : 8V to 16V
Wide Output Supply Current Range : 0mA to 500mA
Adjustable Output Current Limit Up to 500mA with
5ms Timer
LNB Voltages (8 Programmable Levels)
±4.5% High Accuracy of LNB Voltage for 0mA to
500mA Current Output
Fault Latch for OTP, OCP, UVLO
Built-in 22kHz Tone Generator One-Way DiSEqCTM
Communication
Adjustable Rising/Falling Time via External
Capacitor
2-Wire Serial I2C Compatible Interface
RoHS Compliant and Halogen Free
Applications
LNB Power Supply and Control for Satellite Set-Top Box
Analog and Digital Satellite Receivers/ Satellite TV,
Satellite PC cards
Simplified Application Circuit
VIN
VDD
From
MCU
L1
C1
C2
C3
VA
R1 R2 R3
D1
LX
VIN
VREG
BOOST
ISET
RT5007
ADD
LNB
EXTM
SDA
SCL
IRQ
PGND
TCAP
GND
L2
C4
D3
C5
R4
LNB
Power
D2 C7 D4
C6
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS5007-00 July 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT5007
RT5007
Ordering Information
RT5007
Package Type
QW : WQFN-16L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
0M= : Product Code
0M=YM
DNN
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
16 15 14 13
NC
NC
LNB
IRQ
1
2
3
4
GND
17
12 GND
11 VREG
10 ISET
9 TCAP
5 678
WQFN-16L 3x3
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS5007-00 July 2014



Richtek RT5007
RT5007
Functional Pin Description
Pin No.
Pin Name
Pin Function
1, 2 NC No Internal Connection.
Linear Regulator Output Provides the LNB Power. It can supply a 13V to 18V,
3
LNB
500mA and transmit a 600mVpp Tone signal to LNB. It can diagnose the OCP,
PNG, CAD and DIS status by I2C.
Interrupt Request (Active High). IRQ is an open drain output that connects to
VDD (typ. 3.3V to 5V) via a pull high resistor (typ. 4.7k). The voltage level
4 IRQ would be pulled low and latched when the faults (UVLO, OCP, TSD) occur.
The release condition is fault removing, as I2C enables reading the status
register.
Serial Interface Clock Input. Connect to VDD (typ. 3.3V to 5V) via a pull high
5 SCL resistor (typ. 4.7k). Connect to MCU for I2C communication. Support I2C fast
mode (typ. 400kHz) communication.
Serial Interface Data Input/Output. Connect to VDD (typ. 3.3V to 5V) via a pull
6
SDA
high resistor (typ. 4.7k). Connect to MCU for I2C communication. Support I2C
fast mode (typ. 400kHz) communication.
Address Select. Supply by VA for different slave address selection. Several
7
ADD
devices can connect to the same I2C bus by different VA and slave address.
Slave address is 0x10 for VA = 0 to 0.7V, Slave address is 0x12 for VA = 1.3V
to 1.7V, 0x14 for VA = 2.3V to 2.7V, 0x16 for VA = 3.3V to 5V.
External Modulation Input. Used for Tone generation control. Supply (by MCU)
8
EXTM
high level to apply a DiSEqCTM modulation envelope that modulates an
internal tone and then transfers it symmetrically.
9 TCAP
10 ISET
11 VREG
12,
17 (Exposed Pad)
GND
13 VIN
14 LX
15 PGND
16 BOOST
Capacitor (typ. 39nF) for Setting the Rise and Fall Time of the LNB Output. The
capacitor should not be too small to avoid inrush current.
Output Current Limit set Via External Resister. Minimum is 50kfor the
500mA OCP setting.
Internal Reference Output Typically. Connecting a capacitor (typ. 0.22F) from
this pin to GND.
Analog Ground. The Exposed pad should be soldered to a large PCB and
connected to GND for maximum thermal dissipation.
Power Supply Input. A capacitor (typ. 0.1F) should be connected to this pin.
The operating voltage is 8V to 16V. Under Voltage Lockout (UVLO) is 7.35V.
Switch Node. Connect an inductor (typ. 33H) to input and a schottky diode to
output. A RC snubber should be connected to this pin to reduce the voltage
spike.
Power Ground.
Track Supply Voltage to Linear Regulator. Connect to the converter output.
Use a low ESR capacitor to ensure low voltage ripple.
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS5007-00 July 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







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