|
|
PDF RT9068 Data sheet ( Hoja de datos )
| Número de pieza | RT9068 | |
| Descripción | Low Dropout Voltage Linear Regulator | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de RT9068 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
®
RT9068
60V, 30μA IQ, Low Dropout Voltage Linear Regulator
General Description
The RT9068 family are high voltage (60V operation), low
quiescent current low dropout linear regulators capable of
supplying 50mA of output current with a maximum dropout
voltage of 300mV. The low quiescent and shutdown
currents (30μA operating and 2μA shutdown) are ideal for
use in battery-powered and/or high voltage systems.
Ground current is well-controlled in all conditions, including
dropout.
The RT9068 family operates with any reasonable output
capacitors including 1μF low-ESR ceramic types and
features excellent line and load transient responses.
Internal protection circuitry includes reverse-battery
protection, current limiting, thermal shutdown, and reverse
current protection. Output voltage accuracy is ±2% over
the entire line and load range.
These devices are available in 3 fixed-output versions
(2.5V, 3.3V, 5V) as well as a version that supports an
adjustable output voltage (1.25V to 60V). All versions
come in SOP-8 and MSOP-8 packages with an exposed
pad for high power dissipation.
Features
Wide Input Voltage Range : 4.5V to 60V
Low Quiescent Current : 30μA Operating and 2μA
Shutdown
Low Dropout Voltage : 300mV maximum at 50mA
Fixed (2.5V, 3.3V, 5V) and adjustable (1.25V to 60V)
versions
±2% Output Tolerance Over Line and Load
Stable with 1μF Output Capacitor (Aluminum,
Tantalum or Ceramic)
Inherent Reverse-Current Protection (No diode
needed)
−60V Reverse-Battery Protection
Applications
Low Current, High Voltage Regulators
Battery Powered Applications
Telecom and Datacom Applications
Automotive Application
Typical Application Circuit
VIN
4.5V to 60V
VOUT
2.5V/3.3V/5V
RT9068
CIN
0.18µF
VIN VOUT
SENSE
SHDN
COUT
1µF
GND
VIN
4.5V to 60V
CIN
0.18µF
RT9068
VIN VOUT
SENSE
SHDN
FB
GND
VOUT
1.25V to 25V
R1 COUT
1µF
R2
VIN
4.5V to 60V
RT9068
CIN
0.18µF
VIN VOUT
SENSE
SHDN
FB
GND
VOUT
1.25V to 60V
CCOMP R1
COUT
1µF
R2
RT9068-25/33/50
RT9068 (Adjustable Up to 25V Output) RT9068 (Adjustable Up to 60V Output)
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS9068-04 May 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT9068
Absolute Maximum Ratings (Note 1)
VIN to GND ------------------------------------------------------------------------------------------------------------------- −60V to 80V
SHDN to GND --------------------------------------------------------------------------------------------------------------- −60V to 80V
VOUT to GND --------------------------------------------------------------------------------------------------------------- −40V to 80V
SENSE to GND ------------------------------------------------------------------------------------------------------------- −30V to 35V
VIN to VOUT/SENSE when |VIN| ≥ |VOUT| (Normal Operation or Reverse-Battery Condition) -------- −60V to 80V
VIN to VOUT/SENSE when VOUT ≥ VIN ≥ 0 (Reverse-VOUT Condition) ------------------------------------ −35V
FB ------------------------------------------------------------------------------------------------------------------------------ −0.3V to 10V
FB Current ------------------------------------------------------------------------------------------------------------------- −6mA to 6mA
Power Dissipation, PD @ TA = 25°C
MSOP-8 ---------------------------------------------------------------------------------------------------------------------- 2.1W
SOP-8 ------------------------------------------------------------------------------------------------------------------------- 3.26W
Package Thermal Resistance (Note 2)
MSOP-8, θJA ----------------------------------------------------------------------------------------------------------------- 47.4°C/W
MSOP-8, θJC ---------------------------------------------------------------------------------------------------------------- 11.9°C/W
SOP-8, θJA ------------------------------------------------------------------------------------------------------------------- 30.6°C/W
SOP-8, θJC ------------------------------------------------------------------------------------------------------------------- 3.4°C/W
Junction Temperature ------------------------------------------------------------------------------------------------------ 150°C
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260°C
Storage Temperature Range --------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ----------------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Supply Input Voltage ------------------------------------------------------------------------------------------------------- 4.5V to 60V
Junction Temperature Range --------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(4.5V < VIN < 60V, VSHDN = 0V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Input Supply
Operational VIN
Quiescent Current
Shutdown Current
Input Reverse Leakage
Current
VIN
IQ
ISHDN
IVINr
0 < IOUT < 50mA
VIN = 24V, VSHDN = 0V
VIN = 24V, VSHDN = 2.5V, VOUT = 0
VIN = 60V, VOUT = 0V
Output Voltage and Current
Output Current Limit
ILIM
Line Regulation
VLINE
Load Regulation
VLOAD
5.5V < VIN < 60V, IOUT = 50mA
0.1mA < IOUT < 50mA
Min Typ Max Unit
4.5 -- 60 V
-- 30 40 A
-- 2 15 A
-- -- 0.1 mA
120 -- 300 mA
-- 0.5 --
%
-- 0.7 --
%
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS9068-04 May 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
RT9068
Applications Information
The RT9068 is a high input-voltage linear regulator
specifically designed to minimize external components.
The input voltage range is from 4.5V to 60V. The device
supplies 50mA of output current with a maximum dropout
voltage of 300mV.
Fixed VOUT Applications
The fixed output versions are equipped with internal
resistive dividers to set the output voltage to 2.5V, 3.3V,
or 5V, respectively. The total resistance of the each internal
feedback divider is about 1MΩ The internal dividers connect
between SENSE and GND, with the midpoint connecting
to the input of the error amplifier. These versions are all
internally compensated.
Adjustable Output Voltage and Compensation
RT9068
The adjustable output versions may be set to provide from
1.25V to 60V, using external feedback voltage divider
resistors (Figure 1). These included an internal feed-
forward compensation capacitor, connected between
SENSE and FB, which may be used when regulating at
output voltages up to 25V. To achieve the correct
compensation (together with your external FB divider, use
an upper divider resistor (R1) value between 500kΩ and
1MΩ. Calculate R2 according to the following formula :
R2 = R1 / (VOUT / 1.25V − 1).
For output voltages greater than 25V an external feed-
forward capacitor (Figure 2) should be used and SENSE
should be left unconnected. Choose a lower divider resistor
(R2) at least 10kΩ and calculate R1 according to the
following formula : R1 = R2 x (VOUT / 1.25V − 1), Then,
calculate the compensation capacitor (CCOMP) value
according to the following formula : CCOMP = 25μs / R1.
VIN
4.5V to 60V
CIN
0.18µF
RT9068
VIN VOUT
SENSE
SHDN
FB
GND
VOUT
1.25V to 25V
R1 COUT
1µF
R2
Figure 1. RT9068 Adjustable Output Up to 25V
VIN
4.5V to 60V
CIN
0.18µF
RT9068
VIN VOUT
SENSE
SHDN
FB
GND
CCOMP R1
COUT
1µF
VOUT
1.25V to 60V
R2
Figure 2. RT9068 Adjustable Output Above 25V
Remote-Sense Applications
Since VOUT and SENSE (and FB) are separate pins, it is
possible to connect SENSE to the output voltage remotely
at the load (as long as the output voltage is 25V or less).
FB can also be connected remotely, with SENSE
unconnected if the output exceeds 25V. Remote sensing
eliminates output voltage errors due to any resistive voltage
drop between VOUT and the load. (Voltage drops in the
ground connection cannot be compensated.)
Added External NPN for High-Current Applications
Higher output currents and/or increased power dissipation
are possible using an external NPN output transistor. VOUT
drives the base of the transistor and SENSE and/or FB
monitors the actual output voltage, as in normal
applications. The fixed-output versions (Figure 3) or
adjustable-output version (Figure 4) can be used.
Figure 3 and Figure 4 have no current limit and should be
used with care. If a crude current limit is desired, add the
two diodes and resistor shown in Figure 5. The approximate
current limit is 0.7V/R3. Any small switching diodes can
be used and size R3 for the power dissipated in R3, which
is typically 0.7V x 0.7V / R3.
VIN
4.5V to 60V
CIN
0.18µF
RT9068
VIN VOUT
SHDN SENSE
GND
MJD31C
100
COUT
10µF
VOUT
2.5V/3.3V/5V
Figure 3. RT9068-25/33/50 External Transistor
Application
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS9068-04 May 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet RT9068.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| RT9068 | Low Dropout Voltage Linear Regulator | Richtek Technology |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |