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Número de pieza | FR9888 | |
Descripción | 340KHz Synchronous Step-Down DC/DC Converter | |
Fabricantes | Fiti | |
Logotipo | ||
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FR9888
23V, 3A, 340KHz Synchronous Step-Down
DC/DC Converter
Description
The FR9888 is a synchronous step-down DC/DC
converter that provides wide 4.5V to 23V input
voltage range and 3A continuous load current
capability.
Fault protection includes cycle-by-cycle current limit,
input UVLO, output over voltage protection and
thermal shutdown. Besides, adjustable soft-start
function prevents inrush current at turn-on. This
device uses current mode control scheme that
provides fast transient response. In shutdown mode,
the supply current is about 1uA.
The FR9888 is available in an 8-pin SOIC package,
provides a very compact system solution and good
thermal conductance.
Features
● Wide Input Voltage from 4.5V to 23V
● 3A Output Current
● Adjustable Output Voltage from 0.925V to 14V
● Low Rds(on) integrated Power MOSFET
● High Efficiency Up to 93%
● Fixed 340KHz Switching Frequency
● Current Mode Operation
● Adjustable Soft-Start
● Cycle-by-Cycle current limit
● Input Under Voltage Lockout
● Over-Temperature Protection With Auto
Recovery
● 1uA Shutdown Current
● Internal Compensation Function
● SOP-8 and Thermal Enhanced SOP-8P
Packages
● RoHS Compliant
Applications
● Set-Top-Box
● DVD,LCD Displays
● OLPC, Netbook
● Datacom, XDSL
Pin Assignments
SP Package (SOP- 8 Expose pad )
Figure 1. Pin Assignment of FR9888
Ordering Information
FR9888□□□
TR: Tape / Reel
G: Green
Package Type
SP: SOP-8(Exposed Pad)
FR9888-0.1-OCT-2010
1
Free Datasheet http://www.datasheet4u.net/
1 page fitipower integrated technology lnc.
FR9888
Electrical Characteristics
(VIN=12V, TA=25℃, unless otherwise specified.)
Parameter
Conditions
VIN Input Supply Voltage (Note2)
VIN Supply Current
VIN Shutdown Supply Current
Feedback Voltage
Feedback OVP Threshold Voltage
High-Side MOSFET RDS(ON) (Note3)
Low-Side MOSFET RDS(ON) (Note3)
High-Side MOSFET Leakage Current
High-Side MOSFET Current Limit (Note3)
Low-Side MOSFET Current Limit (Note3)
Error Amplifier Voltage Gain (Note3)
Oscillation frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time (Note3)
Input UVLO Threshold
VEN = 1.8V
VEN = 0V
4.5V≦VIN≦18V
VEN = 0V, VSW = 0V
Minimum Duty
VFB = 0V
VFB = 0.8V
VIN Rising
Under Voltage Lockout Threshold Hysteresis
Soft-Start Current
Soft-Start Period
CSS = 0.1uF
EN Input Low Voltage
EN Input High Voltage
EN Input Current
Thermal Shutdown Threshold (Note3)
VEN = 2V
Note2:When VIN = 4.5V, VOUT = 3.3V, maximum load current is about 1A.
Note3:Not production tested.
Min Typ Max
4.5 23
1.1
1
0.9 0.925 0.95
1.5
130
100
10
45
3
400
280 340 380
110
90
220
4.4
300
6
15
0.4
2
2
160
Unit
V
mA
µA
V
V
mΩ
mΩ
uA
A
A
V/V
KHz
KHz
%
ns
V
mV
uA
ms
V
V
uA
℃
Function Description
FR9888-0.1-OCT-2010
5
Free Datasheet http://www.datasheet4u.net/
5 Page fitipower integrated technology lnc.
FR9888
Outline Information (Continued)
SOP- 8 (Exposed Pad) Package (Unit: mm)
SYMBOLS
UNIT
A
A1
A2
B
D
D1
E
E1
e
H
L
DIMENSION IN MILLIMETER
MIN MAX
1.25
1.70
0.00
0.15
1.25
1.55
0.31
0.51
4.80
5.00
1.82
3.35
3.80
4.00
1.82
2.41
1.20
1.34
5.80
6.20
0.40
1.27
Note:Followed From JEDEC MO-012-E.
Life Support Policy
Fitipower’s products are not authorized for use as critical components in life support devices or other medical systems.
FR9888-0.1-OCT-2010
11
Free Datasheet http://www.datasheet4u.net/
11 Page |
Páginas | Total 11 Páginas | |
PDF Descargar | [ Datasheet FR9888.PDF ] |
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