FR9884 Datasheet PDF - Fiti
Part Number | FR9884 | |
Description | 340KHz Synchronous Step-Down DC/DC Converter | |
Manufacturers | Fiti | |
Logo | ||
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FR9884
18V, 3A, 340KHz Synchronous Step-Do8w5nT
DC/DC Converter
Description
The FR9884 is a synchronous step-down DC/DC
converter that provides wide 4.5V to 18V 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 10μA.
The FR9884 is available in an 8-pin SOIC package,
which provides a very compact system solution and
good thermal conductance.
Features
● Wide Input Voltage from 4.5V to 18V
● 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
● 10μA Shutdown Current
● Thermal Enhanced SOP-8 (Exposed Pad) Package
● RoHS Compliant
Applications
● Set-Top-Box
● DVD,LCD Display
● OLPC, Netbook
● Distributed Power System
● Datacom, XDSL
Pin Assignments
SP Package (SOP-8 Exposed Pad)
BS
VIN
SW
GND
1
2
3
4
8 SS
7 EN
6 COMP
5 FB
Figure 1. Pin Assignment of FR9884
Ordering Information
FR9884□□□
TR: Tape / Reel
G: Green
Package Type
SP: SOP-8 (Exposed Pad)
FR9884-1.7-DEC-2011
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fitipower integrated technology lnc.
Electrical Characteristics
(VIN=12V, TA=25°C, unless otherwise specified.)
Parameter
VIN Input Supply Voltage (Note 2)
VIN Supply Current
VIN Shutdown Supply Current
Feedback Voltage
Feedback OVP Threshold Voltage
High-Side MOSFET RDS(ON) (Note 3)
Low-Side MOSFET RDS(ON) (Note 3)
High-Side MOSFET Leakage Current
High-Side MOSFET Current Limit (Note 3)
Low-Side MOSFET Current Limit (Note 3)
Conditions
VEN = 1.8V
VEN = 0V
4.5V≦VIN≦18V
VEN = 0V, VSW = 0V
Minimum Duty
Current sense to COMP Transconductance (Note 3)
Error Amplifier Transconductance (Note 3)
ΔICOMP = ±10μA
Error Amplifier Voltage Gain (Note 3)
Oscillation frequency
Short Circuit Oscillation Frequency
VFB = 0V
Maximum Duty Cycle
VFB = 0.8V
Minimum On Time (Note 3)
Input UVLO Threshold
VIN Rising
Under Voltage Lockout Threshold Hysteresis
Soft-Start Current
Soft-Start Period
EN Lockout Threshold Voltage
EN Shutdown Threshold Voltage
CSS = 0.1μF
Thermal Shutdown Threshold (Note 3)
Note 2:When VIN = 4.5V, VOUT = 3.3V, maximum load current is about 2A.
Note 3:Not production tested.
FR9884
85T
Min Typ Max Unit
4.5 18 V
1.1 mA
10 15 μA
0.9 0.925 0.95
V
1.3 V
120 mΩ
80 mΩ
10 μA
3.8 5
A
3A
3.5 A/V
1600
μA/V
400 V/V
280 340 400 KHz
110 KHz
90 %
200 ns
4.4 V
400 mV
6 μA
15 ms
2.3 2.5 2.7
V
1.1 1.4
V
160 °C
FR9884-1.7-DEC-2011
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for FR9884 electronic component. |
Information | Total 13 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ FR9884.PDF Datasheet ] |
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