DS1094L Spread-Spectrum EconOscillator Datasheet

DS1094L Datasheet, PDF, Equivalent


Part Number

DS1094L

Description

Multiphase Spread-Spectrum EconOscillator

Manufacture

Maxim Integrated

Total Page 12 Pages
Datasheet
Download DS1094L Datasheet


DS1094L
DS1094L
Multiphase Spread-Spectrum EconOscillator
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-
grammed using the I2C-compatible, 2-wire serial interface
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
Ordering Information
PART
DS1094LU
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 µSOP
Typical Operating Circuit
VCC
RPULLUP
VCC OUT1
OUT2
OUT3
SCL OUT4
SDA
GND
DS1094L
THREE-PHASE
EXAMPLE WITH
DITHERED CLOCKS TO
REDUCE EMI
VIN
PHASE 1
DC-DC
STEP-DOWN
CONVERTER
PHASE 2
DC-DC
STEP-DOWN
CONVERTER
PHASE 3
DC-DC
STEP-DOWN
CONVERTER
Pin Configuration
VOUT
TOP VIEW
OUT1 1
OUT2 2
VCC 3
GND 4
DS1094L
8 SCL
7 SDA
6 OUT4
5 OUT3
µSOP
EconOscillator is a trademark of Maxim Integrated Products, Inc.
19-7628; Rev 2; 5/15

DS1094L
DS1094L
Multiphase Spread-Spectrum EconOscillator
Absolute Maximum Ratings
Voltage Range on VCC, SDA, and SCL
Relative to Ground............................................-0.5V to +6.0V
Operating Temperature Range............................ -40°C to +85°C
EEPROM Programming Temperature Range.........0°C to +70°C
Storage Temperature Range............................. -55°C to +125°C
Soldering Temperature.......................................See IPC/JEDEC
J-STD-020A Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Recommended DC Operating Conditions
(TA = -40°C to +85°C)
PARAMETER
Supply Voltage
SYMBOL
VCC (Note 1)
CONDITIONS
Input Logic 1 (SDA, SCL)
VIH
Input Logic 0 (SDA, SCL)
VIL
MIN
3.0
0.7 x
VCC
-0.3
TYP
MAX
3.6
VCC +
0.3
+0.3 x
VCC
UNITS
V
V
V
DC Electrical Characteristics
(VCC = +3.0 to 3.6V, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
Active Supply Current
High-Level Output Voltage
(OUT1-4)
Low-Level Output Voltage
(OUT1-4)
Low-Level Output Voltage
(SDA)
High-Level Input Current
(SDA, SCL)
Low-Level Input Current
(SDA, SCL)
SYMBOL
ICC
VOH
CONDITIONS
CL = 15pF per output, SDA = SCL = VCC
IOH = -4mA; VCC = min
VOL IOL = 3.5mA
3mA sink current
VOL 6mA sink current
IIH VIH = VCC
IIL VIL = 0.0V
MIN TYP MAX UNITS
1.4 3 mA
2.4 V
0.4
0.4
0.6
+1.0
V
V
µA
-1.0 µA
www.maximintegrated.com
Maxim Integrated 2


Features DS1094L Multiphase Spread-Spectrum Econ Oscillator General Description The DS1 094L is a silicon oscillator that gener ates four multiphase, spread-spectrum, square-wave outputs. Frequencies betwee n 2MHz and 31.25kHz can be output in ei ther two, three, or four-phase mode. Th e internal master oscillator can be dit hered by either 0, 2, 4, or 8% to reduc e the amount of peak spectral energy at the fundamental and harmonic clock fre quencies. This significantly reduces th e amount of electromagnetic interferenc e (EMI) radiation that is generated at the system level. The DS1094L is ideall y suited as a clock generator for switc hed-mode power supplies. The outputs ge nerated by the DS1094L are used by DC-D C circuitry to efficiently shift voltag es either up or down. The DS1094L can b e programmed using the I2C-compatible, 2-wire serial interface to select the o utput frequency, number of clock phases , and dither rate, or optionally it can be shipped from the factory custom programmed. Applications ●●.
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