深圳市科瑞芯电子有限公司

ETA355DCSU 电子元器件 ETA 封装CSP-20 批次22+ 控制输出同步降压转换器

DESCRIPTION
The ETA355D is a hig-ffciency, DC-t0-DC step-down
switching regulator, capable of dliveing up to 5A of puse load.
It integrates an RC iterfce that dynamically scales the output
voltages on demand. The DCDC control block belongs to a new
breed of high frequency synchronous Step-Down converter that
combines the advantages of voltage mode control and
Constant-0n-Time control. lts adaptive Constant- _On-Time
control dynamically changes switch on time to achieve a
constant switching frequency. It does not have the minimum
on-time constrain normally a fixed-frequency current mode
Step- down requires, alowing it to go down to very low duty
ratio without afcting loop stability. The voltage mode nature
also provides a more superior load transient response and a
seamless tansition from PFM to PWM modes. Cycle -by-cycle
current limit provides output short-circuit protection and an
input OVP function guards ETA355D against possible input
voltage surge. ETA355D is housed in a 2mm X 1.6mm CSP-20
Package.

FEATURES
BC Dynamic Output Control
Synchronous High Efciency up to 95%
Fast load transient response
Capable of Deliveing 5A
Input 0VP at 6.2V
No Extermal Schottky Diode Needed
Thermal shutdown and UVLO
CSP-20 (4x5) package

APPLICATIONS
ARM based CPUs
Smart Phone
Tablet, MID
Smart Set-Top Box, 0TT

应用原理图：