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Product Introduction

Product parameters

Funtion:PWM Step-down DC-DC Controller IC

Opration Mode:PWM BUCK

Vout Range:5V

Vin Range:4.8V-32V

Max Output Current:3A

Operating Current:515uA

Chip Temperature Regulation:No

Package:SOP8

Chip Enable:Yes

On-chip Power MOSFET:No


General Descriptions:

The CN5208 is a switch-mode PWM step-down DC-DC controller using few external components.

It achieves 5A continuous output current over a wide input supply range with excellent load and line regulation. The output voltage is internally set  at 5V.

The high switching frequency of 550KHz allows tiny external components to be usable. The CN5208 is designed to be stable with ceramic output capacitor. Pulse skipping mode is adopted under light load for high efficiency. Furthermore, the low operating current and low dropout operation make the CN5208 is suitable for battery powered systems.

Fault protection includes cycle-by-cycle current limit, short output protection and output overvoltage protection. In shutdown mode, the CN5208 draws only 7.5μA(VCC=15V) of supply current. On-chip soft-start minimizes the inrush supply current and the output overshoot at initial startup.

The CN5208 is available in a space-saving 8-pin SOP package.

Applications:

l  Car Charger

l  Set-Top Box, Modems

l  Pre-regulator

l  Distributed Power Systems

l  Battery Chargers

Features:

l  Wide Input Voltage: 4.8V to 32V

l  Operating with an External P-Channel MOSFET

l  Output Current Up to 5A

l  Fixed Switching Frequency: 550KHz

l  Fixed Output Voltage with 1% Accuracy

l  Efficiency up to 95%

l  Low Drop-Out Mode

l  Stable with Low-ESR Output Ceramic Capacitor

l  On-Chip Power-On Delay to Debounce Input Supply

l  Cycle-by-Cycle Current Limit

l  Overvoltage protection

l  Frequency Foldback for Output Short Circuit Protection

l  Built-in Soft Start

l  High Efficiency at Light Load with Pulse Skipping Mode

l  Shutdown Curent: 7.5uA typical at 15V

l  Operating Ambient Temperature
40 to 85

l  Available in 8-Pin SOP Package

l  Pb-free, Rohs-Compliant, Halogen Free


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