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FR9809CPGTR Datasheet(PDF) 1 Page - Fitipower Integrated Technology Inc.

Part No. FR9809CPGTR
Description  21V, 5A, 500KHz Synchronous PWM-Buck DC/DC Converter
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Maker  FITIPOWER [Fitipower Integrated Technology Inc.]
Homepage  http://www.fitipower.com/en_US/index.asp
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1
FR9809-Preliminary 0.4-OCT-2012
FR9809
85T
fitipower integrated technology lnc.
21V, 5A, 500KHz Synchronous PWM-Buck
DC/DC Converter
Pin Assignments
SP Package (SOP-8 Exposed Pad)
LX
GND
LX
VIN
FB
VCC
BST
2
3
4
6
5
7
8
9
GND
1
SHDN/S
Figure 1. Pin Assignment of FR9809
Ordering Information
Description
FR9809 is a high-efficiency synchronous step-down
DC/DC converter that employs a special process
technique to obtain very low RDS(ON) for the internal
metal
–oxide–semiconductor field-effect transistor
(MOSFET).
The input operation voltage is in a wide
range from 4.75V to 21V, and continuous load
current capability is 5A.
Control circuit is designed
by a particular current mode which provides fast
transient response and eases loop stabilization.
This product has a very low standby current less
than 1μA in shutdown mode. When the
pin voltage is less than 0.4V, FR9809 will turn off.
Fault protection includes over current protection
(OCP), under voltage lockout protection (UVLO) and
over temperature protection (OTP) function.
This high-efficiency current mode step-down
“Green
Power
Converter
” offers the standard SOP-8
package with an exposed pad.
Features
High Efficiency up to 90%
Internal MOSFET RDS(ON): 110mΩ 20mΩ
Internal Compensation
Input Operation Voltage Range: 4.75V to 21V
5A Continuous Output Current
Output Voltage down to 0.805V
500KHz Oscillation Frequency
Sync to External Clock from 300KHz to 800KHz
Cycle-by-Cycle Current Limit
Under Voltage Lockout
Over-Temperature Protection with Auto Recovery
<1μA Shutdown Current
Thermal Enhanced SOP-8 (Exposed Pad)
Package
RoHS Compliant
Applications
Networking Equipment
OLPC, Netbook
Distributed Power System
LCD Monitor, TV, STB
External HDD
Security System
FR9809
□□□
G: Green
C: Green
TR: Tape/Reel
Package Type
SP: SOP-8 (Exposed Pad)




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