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PDF FR8018 Data sheet ( Hoja de datos )
| Número de pieza | FR8018 | |
| Descripción | 500KHz Synchronous Step-Down DC/DC Converter | |
| Fabricantes | Fiti | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FR8018 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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fitipower integrated technology lnc.
FR8018
23V, 4A, 500KHz Synchronous Step-Dow85nT
DC/DC Converter
Description
The FR8018 is a synchronous step-down DC/DC
converter that provides wide 4.5V to 23V input
voltage range and 4A continuous load current
capability. At light load condition, the FR8018 can
operate at PSM mode to support high efficiency and
reduce power loss.
The FR8018 fault protection includes cycle-by-cycle
current limit, UVLO and thermal shutdown.
Besides, adjustable soft-start or internal soft-start
function prevents inrush current at turn-on. This
device uses current mode control scheme which
provides fast transient response.
Internal
compensation function reduces external
compensator components and simplifies the design
process. In shutdown mode, the supply current is
about 1μA.
The FR8018 is offered in SOP-8 (Exposed Pad)
package and provides good thermal conductance.
Features
Low RDS(ON) Integrated Power MOSFET
Internal Compensation Function
Wide Input Voltage Range: 4.5V to 23V
Adjustable Output Voltage Down to 0.765V
4A Output Current
Fixed 500kHz Switching Frequency
External Programmable Soft-Start or Internal 1ms
Soft-Start
PSM (High Efficiency at Light Load)
Cycle-by-Cycle Current Limit
Over-Temperature Protection with Auto Recovery
Under Voltage Lockout
<1μA Shutdown Current
Hiccup Short Circuit Protection
FB pin Floating Protection
SOP-8 Exposed Pad Package
RoHS Compliant
Applications
LCD Display, TV
STB (Set-Top-Box)
Distributed Power System
Networking, XDSL Modem
Pin Assignments
SP Package (SOP-8 Exposed Pad)
BST
VIN
LX
GND
18
297
3 GND 6
45
SS
SHDN
NC
FB
Ordering Information
FR8018□□□
TR: Tape/Reel
C: Green
Package Type
SP: SOP-8 (Exposed Pad)
Figure 1. Pin Assignments of FR8018
FR8018-Preliminary 0.1-SEP-2013
1
1 page  
fitipower integrated technology lnc.
FR8018
Electrical Characteristics
(VIN=12V, TA=25°C, unless otherwise specified.)
Parameter
Symbol
Conditions
VIN Quiescent Current
VIN Shutdown Supply Current
Feedback Voltage
IDDQ H =1.8V, VFB=1.0V
ISD H =0V
VFB 4.5V≦VIN≦23V
High-Side MOSFET RDS(ON) (Note3)
RDS(ON)
Low-Side MOSFET RDS(ON) (Note3)
High-Side MOSFET Leakage Current
High-Side MOSFET Current Limit (Note3)
RDS(ON)
ILX(leak)
ILIMIT(HS)
H =0V, VLX=0V
Minimum Duty
Oscillation Frequency
FOSC
Short Circuit Oscillation Frequency
FOSC(short) VFB=0.2V
Maximum Duty Cycle
DMAX
VFB=0.7V
Minimum On Time (Note3)
TMIN
Input Supply Voltage UVLO Threshold
Input Supply Voltage UVLO Threshold
Hysteresis
Soft-Start Current
VUVLO(VTH)
VUVLO(HYS)
ISS
VIN Rising
VSS=0V
External Soft-Start Period
TSS CSS=0.1μF
Internal Soft-Start Period
TSS SS pin floating
H Input Low Voltage
H (L
H Input High Voltage
H Input Current
Thermal Shutdown Threshold (Note3)
H (H
H
TSD
H =2V
Note 3：Not production tested.
Min Typ Max
2
1 10
0.753 0.765 0.777
95
55
10
5.5
375 500 625
150
88
100
4.2
400
6
13
1
0.4
2
2
165
85T
Unit
mA
μA
V
mΩ
mΩ
μA
A
kHz
kHz
%
ns
V
mV
μA
ms
ms
V
V
μA
°C
FR8018-Preliminary 0.1-SEP-2013
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet FR8018.PDF ] | |
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