EconOscillator is a trademark of Maxim Integrated Products, Inc.

General Description

The DS1094L is a silicon oscillator that generates four

multiphase, spread-spectrum, square-wave outputs.

Frequencies between 2MHz and 31.25kHz can be out-

put in either two, three, or four-phase mode. The internal

master oscillator can be dithered by either 0, 2, 4, or

8% to reduce the amount of peak spectral energy at the

fundamental and harmonic clock frequencies. This signifi-

cantly reduces the amount of electromagnetic interference

(EMI) radiation that is generated at the system level.

The DS1094L is ideally suited as a clock generator for

switched-mode power supplies. The outputs generated by

the DS1094L are used by DC-DC circuitry to efficiently shift

voltages either up or down. The DS1094L can be pro-

to select the output frequency, number of clock phases,

and dither rate, or optionally it can be shipped from the

factory custom programmed.

Applications

● Switch-Mode Power Supplies

● Servers

● Printers

Features

● EconOscillator™ with Two, Three, or Four Phase

Outputs

● Ideally Suited as the Clock Generator for Switch-

Mode Power Supplies

● Output Frequencies Programmable from 2MHz to

31.25kHz

● Dithered Output Significantly Reduces EMI

Emissions

● No External Timing Components Required

● Nonvolatile (NV) Configuration Settings

● User-Programmable—Factory Programmed Options

Available

● Operating Temperature Range: -40°C to +85°C

19-7628; Rev 2; 5/15

PART

TEMP RANGE

PIN-PACKAGE

DS1094LU

-40°C to +85°C

8 µSOP

OUT4

OUT3

GND

1

2

8

7

SCL

SDA

OUT2

OUT1

µSOP

TOP VIEW

3

4

6

5

DS1094L

PHASE 1

PHASE 2

PHASE 3

DC-DC

STEP-DOWN

CONVERTER

OUT1

OUT2

OUT3

OUT4

GND

SCL

SDA

DS1094L

THREE-PHASE

EXAMPLE WITH

DITHERED CLOCKS TO

REDUCE EMI

DC-DC

STEP-DOWN

CONVERTER

DC-DC

STEP-DOWN

CONVERTER

Ordering Information

Typical Operating Circuit

Pin Configuration

DS1094L

Multiphase Spread-Spectrum EconOscillator