FR9886 – 380KHz Synchronous Step-Down DC/DC Converter

Part Number : FR9886

Function : 380KHz Synchronous Step-Down DC/DC Converter

Manufactures : fitipower integrated technology

Images :

1 page
FR9886 image

2 page
pinout

Description :

fitipower integrated technology lnc. FR9886 85T 23V, 2.5A, 340KHz Synchronous Step-Down DC/DC Converter Description The FR9886 is a synchronous step-down DC/DC converter that provides wide 4.5V to 23V input voltage range and 2.5A continuous load current capability. The FR9886 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 which provides fast transient response. Internal Compensation function reduces external compensation components and simplifies the design process. In shutdown mode, the supply current is less than 1uA. The FR9886 is available in an 8-pin SOIC package, provides a very compact system solution and good thermal conductance. Features ● High Efficiency Up to 96% ● Low Rds(on) integrated Power MOSFET ● Internal Compensation Function ● Wide Input Voltage Range: 4.5V to 23V ● Adjustable Output Voltage Range: 0.925V to 20V ● 2.5A Output Current ● 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 ● SOP-8 and SOP-8 Exposed Pad Package Applications ● Set-Top-Box (STB) ● Televisions ● Distributed Power Systems ● XDSL Modems Pin Assignments SO Package (SOP- 8) Ordering Information FR9886□□□ TR: Tape / Reel BOOST VIN LX GND 1 2 3 4 8 7 6 5 SS SHDN NC FB G: Green Package Type SO: SOP-8 SP: SOP-8(Exposed Pad) SP Package (SOP- 8 Exposed pad ) BOOST VIN LX GND 1 2 3 4 8 7 6 5 SS SHDN NC FB Figure 1. Pin Assignment of FR9886 FR9886- 1.0-APR-2011 1 Free Datasheet http:/// fitipower integrated technology lnc. FR9886 85T Typical Application Circuit R3 10kΩ~100kΩ C4 10nF~0.1uF 7 2 C1 10uF/25V CERAMIC x 2 1 LX 3 L1 4.7uH~15uH VOUT 3.3V R1 26.1kΩ (optional) SHDN BOOST VIN 4.5V to 23V VIN FR9886 6 NC GND 4 FB SS 5 C6 C2 22uF/6.3V CERAMIC x 2 8 C3 10nF ~ 0.1uF R2 10kΩ Figure 2. CIN /COUT use Ceramic Capacitors Application Circuit C4 10nF~0.1uF R3 10kΩ~100kΩ 7 2 1 3 L1 4.7uH~15uH VOUT 3.3V R1 26.1kΩ C6 C2 100uF/6.3V EC x 1 SHDN BOOST VIN 4.5V to 23V C1 100uF/25V EC x 1 C5 0.1uF/25V CERAMIC x 1 VIN LX FR9886 6 NC GND 4 FB SS 5 (optional) 8 C3 10nF ~ 0.1uF R2 10kΩ Figure 3. CIN /COUT use Electrolytic Capacitors Application Circuit VOUT 1.2V 1.8V 2.5V 3.3V 5V 1.2V 1.8V 2.5V 3.3V 5V R1 3kΩ 9.53kΩ 16.9kΩ 26.1kΩ 44.2kΩ 3kΩ 9.53kΩ 16.9kΩ 26.1kΩ 44.2kΩ R2 10kΩ 10kΩ 10kΩ 10kΩ 10kΩ 10kΩ 10kΩ 10kΩ 10kΩ 10kΩ C6 200pF~1nF 200pF~1nF 200pF~1nF 200pF~1nF 200pF~1nF -----L1 4.7uH 4.7uH 10uH 10uH 10uH 4.7uH 4.7 H 10uH 10uH 10uH COUT 22uF MLCC x2 22uF MLCC x2 22uF MLCC x2 22uF MLCC x2 22uF MLCC x2 100uF EC x1 100uF EC x1 100uF EC x1 100uF EC x1 100uF EC x1 Table 1. [...]

3 page
image

FR9886 Datasheet


This entry was posted in Uncategorized. Bookmark the permalink.