EC3201S

1A, 1.5MHz, Synchronous

Step Down DC/DC Converter

E-CMOS Corp. (www.ecmos.com.tw)

5E12N-Rev. F001

3/9

Absolute Maximum Ratings

(Note 1)

Vin to GND …………………………………………… –0.3V to +6V

SW Voltage to GND ...…………………… –0.3V to Vin+0.3V

EN Voltage to GND ..……………………………… –0.3V to Vin

FB/Vout to GND ..………………………………… –0.3V to Vin

SW Peak Current ………………………………………….………. 3A

Operating Temperature Range ……...… –40°C to +85°C

Junction Temperature ……………..………….…........ +150°C

Storage Temperature Range …………... –65°C to +150°C

Lead Temperature (Soldering 10s) …………...…. +260°C

ESD Classification …………………………………………… Class 2

CAUTION: Stresses above those listed in

“Absolute Maximum Ratings” may cause permanent

damage to the device. This is a stress only rating and operation of the device at these or any other conditions

above those indicated in the operational sections of this specification is not implied.

Package Thermal Characteristics

(Note 2)

TSOT23-5L:

Thermal Resistance, θJA …………..………………… 250°C/W

Thermal Resistance, θJC …………..………………… 130°C/W

TDFN 2x2-6L:

Ther

mal Resistance, θJA …………..…………………. 120°C/W

Thermal Resistance, θJC …………..…………………… 20°C/W

Recommended Operating Conditions

(Note 3)

Supply Input Voltage ……….………………… +2.5V to +5.5V

Junction Temperature Range…………… –40°C to +125°C

Ambient Temperature Range …………… –40°C to +85°C

Block Diagram

PWM

Logic

Oscillator

+

_

+

_

Reference

Vin

Zero-current

comparator

DCC

M1

M2

Current

Sense

Amplifier

UG

LG

SW

GND

PWM

Comparator

Clock

0.6V

FB

EN

Error

Amplifier

Slop Comp