|
|
PDF RT8078A Data sheet ( Hoja de datos )
| Número de pieza | RT8078A | |
| Descripción | Synchronous Step-Down Converter | |
| Fabricantes | Richtek | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de RT8078A (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
RT8078A
4A, 1MHz, Synchronous Step-Down Converter
General Description
The RT8078A is a high efficiency synchronous, step-down
DC/DC converter. It's input voltage range from 2.7V to 5.5V
that provides an adjustable regulated output voltage from
0.6V to VIN while delivering up to 4A of output current.
The internal synchronous low on-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. The switching frequency is
fixed internally at 1MHz. The 100% duty cycle provides
low dropout operation, hence extending battery life in
portable systems. Current mode operation with internal
compensation allows the transient response to be
optimized over a wide range of loads and output capacitors.
The RT8078A is operated in PWM mode to achieve high
efficiency for a wide load range. The RT8078A is available
in WDFN-10L 3x3 and SOP-8 (Exposed Pad) packages.
Ordering Information
RT8078A
Package Type
QW : WDFN-10L 3x3 (W-Type)
SP : SOP-8 (Exposed Pad-Option 2)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
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.
Features
z High Efficiency : Up to 95%
z Fixed Frequency : 1MHz
z No Schottky Diode Required
z Internal Compensation
z 0.6V Reference Allows Low Output Voltage
z PWM Mode Operation
z Low Dropout Operation : 100% Duty Cycle
z OCP, UVP, OVP, OTP
z RoHS Compliant and Halogen Free
Applications
z Portable Instruments
z Battery Powered Equipment
z Notebook Computers
z Distributed Power Systems
z IP Phones
z Digital Cameras
Pin Configurations
(TOP VIEW)
LX 1
LX 2
LX 3
PGOOD 4
EN 5
10 PVIN
9 PVIN
8 SVIN
7 NC
11 6 FB
WDFN-10L 3x3
LX
LX
PGOOD
EN
8
27
GND
3 96
45
PVIN
PVIN
SVIN
FB
SOP-8 (Exposed Pad)
DS8078A-01 June 2011
www.richtek.com
1
1 page  
RT8078A
Parameter
S ymbol
Test Conditions
Min Typ Max Unit
EN Pull Low Resistance
-- 500 -- kΩ
Over Temperature Protection
Over Temperature Protection
Hysteresis
Soft-Start Time
VOUT Discharge Resistance
VOUT Over Voltage Protection
(Latch-Off, Delay Time = 10μs)
VOUT Under Voltage Lock Out
(Latch-Off)
TS D
ΔTSD
tS S
Power Good
Power Good Hysteresis
--
--
500
--
--
Measured FB, With Respect to
VREF
--
--
--
150
20
--
100
120
33
90
5
--
--
--
--
--
--
--
--
°C
°C
μs
Ω
%
%
%
%
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. θJA is measured in natural convection at TA = 25°C on a high effective thermal conductivity four-layer test board of
JEDEC 51-7 thermal measurement standard. The measurement case position of θJC is on the exposed pad of the
packages.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
DS8078A-01 June 2011
www.richtek.com
5
5 Page 
Outline Dimension
RT8078A
D2
D
L
E E2
SEE DETAIL A
1
eb
A
A3
A1
21
21
DETAIL A
Pin #1 ID and Tie Bar Mark Options
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Symbol
A
A1
A3
b
D
D2
E
E2
e
L
Dimensions In Millimeters
Min Max
0.700
0.800
0.000
0.050
0.175
0.250
0.180
0.300
2.950
3.050
2.300
2.650
2.950
3.050
1.500
1.750
0.500
0.350
0.450
Dimensions In Inches
Min Max
0.028
0.031
0.000
0.002
0.007
0.007
0.010
0.012
0.116
0.120
0.091
0.104
0.116
0.120
0.059
0.069
0.020
0.014
0.018
W-Type 10L DFN 3x3 Package
DS8078A-01 June 2011
www.richtek.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet RT8078A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| RT8078A | Synchronous Step-Down Converter | Richtek |
| 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 |