LNBP8L - LNBP9L
LNBP10L - LNBP11L
LNB supply and control voltage regulator
Preliminary data
Features
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Simplest integrated solution for LNB remote
supply and control
500 mA guaranteed output current
Dual input supply for reducing power
dissipation (DFN package)
3-state function to enable/disable and select
the output voltage level through a single pin
Fast oscillator startup for DiSEq™ encoding
(LNBP9L/11L versions)
External 22 kHz modulation input pin
(LNBP8L/10L versions)
Cable length compensation, LLC pin
(LNBP10L, LNBP11L versions)
Short-circuit and over-temperature protection
LNB overload and short-circuit dynamic
protection (LNBP10L, LNBP11L versions)
Available in DFN8 (5 x 6 mm) and IPPAK
packages
IPPAK
DFN8 (5 x 6 mm)
supplied at 22 V (min.). Additionally, the
LNBP10L/11L versions have the LLC pin to
increment the selected output voltage value by 1
V (typ.) to compensate for the excess voltage
drop along the coaxial cable (LLC pin HIGH).
An analog 22 kHz modulation input pin (EXTM) is
available in the LNBP8L and LNBP10L versions.
An appropriate DC blocking capacitor must be
used to couple the modulating signal source to
the EXTM pin. The LNBP10L/11L versions are
also equipped with over-current dynamic
protection: as soon as an overload is detected the
output is shut down for the time T
OFF,
which is
determined by the capacitor connected between
the CEXT pin and GND. After the time has
elapsed, the output is resumed for a time T
ON
=
(1/12)*T
OFF
(typ.). If the overload is still present,
the protection circuit will cycle again through T
OFF
and T
ON
until the overload is removed. A typical
T
ON
+T
OFF
value is 1100 ms when a 4.7 µF
external capacitor is used on the C
EXT
. This
dynamic operation can greatly reduce the power
dissipation in short-circuit condition, while
ensuring excellent power-on startup even with
highly capacitive loads on the LNB outputs.
The device is packaged in the IPPAK for through-
hole mounting and in the DFN8 5x6 for surface
mounting. Both package solutions are offered in
two versions: with ten pins (LNBP9L/11L) to use
with the integrated 22 kHz tone generator, or with
the EXTM pin (LNBP8L/10L) to use external 22
kHz sources. All versions have built-in thermal
protection to prevent overheating damage.
Rev 1
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www.st.com
21
Description
Intended for analog and digital satellite receivers,
the LNBP is a monolithic linear voltage regulator,
assembled in the DFN8 5x6 and IPPAK packages,
specifically designed to provide the powering
voltages and the interfacing signals to the LNB
down-converter. The regulator output can be logic
controlled for 13 V or 18 V (typ.) by means of the
EN/VSEL 3-state pin for remotely controlling the
LNB. When the IC is powered and put in standby
(EN/VSEL pin at high impedance), the regulator
output is disabled. In order to reduce power
dissipation, the LNBP10L/11L versions (on DFN
package) feature 2 supply inputs: V
CC1
and V
CC2
.
These pins must be powered, respectively, at 15
V (min.) and 22 V (min.), and an internal switch
will automatically select the appropriate supply
voltage according to the selected output voltage.
The LNBP8L/9L versions (in the IPPAK package)
have only one supply input pin, which must be
November 2008
This is preliminary information on a new product in development or undergoing evaluation. Details are subject to change
without notice.
Contents
LNBP8L - LNBP9L - LNBP10L - LNBP11L
Contents
1
2
3
4
5
6
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Detailed description and application hints . . . . . . . . . . . . . . . . . . . . . . . 9
6.1
6.2
6.3
Input voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Single supply for the DFN package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
IPPAK mounting and thermal considerations . . . . . . . . . . . . . . . . . . . . . . 11
7
8
9
10
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2/21
Pin configuration
LNBP8L - LNBP9L - LNBP10L - LNBP11L
2
Figure 2.
Pin configuration
Pin connections (top view for IPPAK, bottom view for DFN8)
IPPAK
DFN8 (5x6 mm)
Table 1.
Pin description
Pin n°
(IPPAK)
LNBP8/9L
Name
Pin function
Pin n° (DFN)
LNBP10/11L
1
-
Supply input 1:
15 V to 25 V supply. For DFN package it is
VCC1
automatically selected when V
OUT
= 13 V. For IPPAK package
(not available for
V
CC1
and V
CC2
are internally connected together to pin 1 to be
IPPAK)
supplied at 22 V min.
VCC2
(V
CC
pin for
IPPAK)
OUTPUT
GROUND
Supply input 2:
22 V to 25 V supply. For DFN package it is
automatically selected when V
OUT
= 18 V. For IPPAK package
V
CC1
and V
CC2
are internally connected together to the pin 1 to be
supplied at 22 V min.
Output:
regulator output. It is 13 V typ when EN/VSEL LOW and
18 V typ when EN/VSEL HIGH.
GROUND
Enable and output voltage selection 3-state pin:
logic control
input 3-state pin for the remote controlling of the LNB; if LOW
V
OUT
= 13 V, when HIGH V
OUT
= 18 V, if left at high impedance the
IC is set in shut down mode (V
OUT
= 0 V)
Tone enable (LNBP9-11):
logic control input to enable internal
tone generator.
External modulation (LNBP8-10):
Needs DC decoupling to the
AC source. If not used can be left floating.
LLC:
logic control input to add 1 V typ.
C
EXT
:
timing capacitor used by the dynamic overload protection.
Typical application is 4.7 µF for a 1100 ms cycle
2
1
3
4, ePAD
2
3, ePAD
6
4
EN/VSEL
5
5
EXTM/TEN
8
7
NA
NA
LLC
C
EXT
4/21
LNBP8L - LNBP9L - LNBP10L - LNBP11L
Maximum ratings
3
Table 2.
Symbol
Maximum ratings
Absolute maximum ratings
Parameter
Input voltages
VCC1 voltage with respect to OUTPUT voltage
(1)
VCC2 voltage with respect to OUTPUT voltage
(1)
Logic input voltage
External modulation input voltage
Output voltage
Storage temperature range
ESD rating with human body model (HBM) for all pins except 1, 2, 6
ESD rating with human body model (HBM) for pins 1, 2, 6
ESD rating with human body model (HBM) for all pins except 1, 4
ESD rating with human body model (HBM) for pins 1, 4
Value
-0.3 to 28
-0.3 to 25
-0.3 to 25
-0.3 to 7
-0.3 to 1
-0.3 to 25
-50 to 150
2
1.5
2
1.5
kV
Unit
V
V
V
V
V
V
°C
kV
VCC1, VCC2
VCC1-OUTPUT
VCC2-OUTPUT
EN/VSEL, TEN,
LLC
EXTM
OUTPUT
T
STG
ESD
DFN package
ESD
IPPAK package
1. Exposure beyond the VCC1 and VCC2 with respect to OUTPUT absolute-maximum-rated voltages during OUTPUT pin
overload or short-circuit to GROUND may cause permanent damage to the device.
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
These are stress ratings only and functional operation of the device at these conditions is
not implied. Exposure to absolute-maximum-rated conditions for extended periods may
affect device reliability. All voltage values are with respect to network ground terminal unless
otherwise stated.
Operating ratings
Parameter
Operating junction temperature range
Input voltage
Input voltage
Value
0 to 125
15 to 25
22 to 25
Unit
°C
V
V
Table 3.
Symbol
T
J
VCC1
VCC2
Table 4.
Symbol
R
thJA
R
thJC
Thermal data
Parameter
Thermal resistance junction-ambient
Thermal resistance junction-case
8
IPPAK
DFN8
35
(mounted on PCB 2s2p)
Unit
°C/W
°C/W
5/21
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