TS3553

3A/350kHz Synchronous Buck DC/DC Converter

1/11

Version: B11

SOP-8EP

General Description

The TS3553 is a synchronous step-down DC/DC converter that provides wide 4.5V to 23V 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 regulator draws 1µA or less of supply current.

Features

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Operating Voltage Range 4.75V~23V

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Output load current up to 3A

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High Efficiency: Up to 95%

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Fixed Switching Frequency 350kHz

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100mΩ Internal Power MOSFET

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Adjustable Output Voltage from 0.925~20V

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Stable with Low ESR Output Ceramic Capacitors

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Current Mode Operation

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Input Under Voltage Lockout

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Over Temperature Protection

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Cycle-by Cycle Current limit

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<1µA Shutdown Current

Ordering Information

Part No.

Package

Packing

TS3553CS RLG

SOP-8EP

2.5Kpcs / 13” Reel

Note: “G” denote for Halogen Free Product

Application

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Set-Top-Box

●

DVD, LCD Displays

●

Netbook

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Distributed Power System

●

DSL Modems

Typical Application Circuit

3.3V Output Application Circuit

Pin Definition:

1. BS

8. SS

2. VIN

7. EN

3. SW

6. COMP

4. GND

5. FB