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AMS2566

Advanced Monolithic Systems
Part Number AMS2566
Manufacturer Advanced Monolithic Systems
Description PWM buck DC/DC converter
Published Sep 1, 2019
Detailed Description AMS2566 Features General Description „ Wide 3.6V to 25V Input Voltage Range The AMS2566 is a 360 KHz fixed frequency...
Datasheet PDF File AMS2566 PDF File

AMS2566
AMS2566


Overview
AMS2566 Features General Description „ Wide 3.
6V to 25V Input Voltage Range The AMS2566 is a 360 KHz fixed frequency „ Output Adjustable from 0.
8V to 24V PWM buck (step-down) DC/DC converter, „ Maximum Duty Cycle 100% „ Minimum Drop Out 0.
6V „ Fixed 360KHz Switching Frequency „ 5A Constant Output Current Capability „ Internal Optimize Power MOSFET „ High efficiency up to 85~90% „ Excellent line and load regulation „ TTL shutdown capability capable of driving a 5A load with high efficiency, low ripple and excellent line and load regulation.
Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator.
„ EN pin with hysteresis function „ Built in thermal shutdown function „ Built in current limit function „ Built in output short protection function „ Package in TO-263/TO252 and TO220 The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%.
An enable function, an over current protection function is built inside.
When short protection function happens, the operation frequency will be reduced from 360KHz to 70KHz.
An internal Applications „ LCD Monitor and LCD TV compensation block is built in to minimize external component count.
„ TO220 can supply 5A continues „ TO263 can supply 5A , TO252 can supply 4A „ ADSL Modem „ Telecom / Networking Equipment 1 Advanced Monolithic Systems http://www.
ams-semitech.
com Pin Configurations for TO263/TO220/TO252 : AMS2566 Important Note : Pin3 SW is shorted to Tab (heat -sink is not ground) Table 1 Pin Description Pin Number 1 2 3 4 5 Pin Name GND FB SW EN VIN Description Ground Pin.
Care must be taken in layout.
This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into AMS2566.
Feedback Pin (FB).
Through an external resistor divider network, FB senses the output voltage and regulates it.
The fe...


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