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PDF FR9888 Data sheet ( Hoja de datos )
| Número de pieza | FR9888 | |
| Descripción | 340KHz Synchronous Step-Down DC/DC Converter | |
| Fabricantes | Fiti | |
| Logotipo |  |
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fitipower integrated technology lnc.
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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