EC3201S Datasheet, PDF (1/9 Pages) E-CMOS Corporation – 1A, 1.5MHz, Synchronous Step Down DC/DC Converter

1A, 1.5MHz, Synchronous
Step Down DC/DC Converter
EC3201S
..
General Description
EC3201S is a high efficiency step down DC/DC converter operated with current mode and constant frequency.
The internal switch and synchronous rectifier are integrated for high efficiency. External Schottky diodes are not
required. The supply current is only 110µA during operation and drops to less than 1µA in shutdown. EC3201S
can supply 1A of load current from 2.5V to 5.5V supply voltage.
The switching frequency is set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. It
can run 100% duty cycle for low dropout application. The output voltage of EC3201S is adjustable from the FB
pin. EC3201S is RoHS compliant and Lead (Pb) Free.
Features
 1A output current
 Current mode operation
 High efficiency up to 95%
 Shutdown current < 1µA
 2.5V to 5.5V supply voltage
 Over temperature protection
 Constant frequency operation
 Full duty ratio, 0 – 100% in dropout
 RoHS Compliant and Lead (Pb) Free
Applications
 Cellular phones
 PDAs and smart phones
 MP3 players
 Digital still cameras
 Slim-type DVD
 Wireless and DSL card
 Microprocessors and DSP core supplies
 Portable instruments
Pin Assignments
Top View
TSOT23-5L
EN 1
5 FB
Top View
TDFN 2x2-6L
NC 1
6 FB
GND 2
EN 2
5 GND
SW 3
4 Vin ^{Vin 3}
4 SW
E-CMOS Corp. (www.ecmos.com.tw)
1/9
5E12N-Rev. F001