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FR9886

23V, 2.5A, 340Khz Synchronous Step-Down DC/DC Converter

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fitipower integrated technology lnc.

FR9886

23V, 2.5A, 340KHz Synchronous Step-Dow85nT

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)

BOOST

1

VIN

2

LX

3

GND

4

8

SS

7

SHDN

6

NC

5

FB

SP Package (SOP- 8 Exposed pad )

BOOST

1

VIN

2

LX

3

GND

4

8

SS

7

SHDN

6

NC

5

FB

Figure 1. Pin Assignment of FR9886

Ordering Information

FR9886□□□

TR: Tape / Reel

G: Green

Package Type

SO: SOP-8

SP: SOP-8(Exposed Pad)

FR9886- 1.0-APR-2011

1

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