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 SHDN/S 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 R DS (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
深圳市夸克微科技有限公司
相关文章：