DS1094L Multiphase Spread-Spectrum EconOscillator General Description Features The DS1094L is a silicon oscillator that generates four EconOscillator with Two, Three, or Four Phase multiphase, spread-spectrum, square-wave outputs. Outputs Frequencies between 2MHz and 31.25kHz can be out- Ideally Suited as the Clock Generator for Switch- put in either two, three, or four-phase mode. The internal Mode Power Supplies master oscillator can be dithered by either 0, 2, 4, or Output Frequencies Programmable from 2MHz to 8% to reduce the amount of peak spectral energy at the 31.25kHz fundamental and harmonic clock frequencies. This signifi- Dithered Output Significantly Reduces EMI cantly reduces the amount of electromagnetic interference (EMI) radiation that is generated at the system level. Emissions The DS1094L is ideally suited as a clock generator for No External Timing Components Required switched-mode power supplies. The outputs generated by Nonvolatile (NV) Configuration Settings the DS1094L are used by DC-DC circuitry to efficiently shift User-ProgrammableFactory Programmed Options voltages either up or down. The DS1094L can be pro- 2 Available grammed using the I C-compatible, 2-wire serial interface to select the output frequency, number of clock phases, Operating Temperature Range: -40C to +85C and dither rate, or optionally it can be shipped from the factory custom programmed. Applications Switch-Mode Power Supplies Ordering Information Servers PART TEMP RANGE PIN-PACKAGE Printers DS1094LU -40C to +85C 8 SOP Typical Operating Circuit Pin Configuration V IN V OUT V CC TOP VIEW DC-DC STEP-DOWN V PHASE 1 CC R PULLUP CONVERTER OUT1 OUT1 1 8 SCL OUT2 OUT3 DS1094L SCL OUT4 OUT2 2 7 SDA SDA GND V 3 6 OUT4 CC DC-DC PHASE 2 DS1094L STEP-DOWN GND 4 5 OUT3 CONVERTER THREE-PHASE EXAMPLE WITH DITHERED CLOCKS TO SOP REDUCE EMI DC-DC PHASE 3 STEP-DOWN CONVERTER EconOscillator is a trademark of Maxim Integrated Products, Inc. 19-7628 Rev 2 5/15DS1094L Multiphase Spread-Spectrum EconOscillator Absolute Maximum Ratings Voltage Range on V , SDA, and SCL Storage Temperature Range ............................ -55C to +125C CC Relative to Ground............................................-0.5V to +6.0V Soldering Temperature ......................................See IPC/JEDEC Operating Temperature Range ........................... -40C to +85C J-STD-020A Specification EEPROM Programming Temperature Range ........0C to +70C 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 (T = -40C to +85C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) 3.0 3.6 V CC 0.7 x V + CC Input Logic 1 (SDA, SCL) V V IH V 0.3 CC +0.3 x Input Logic 0 (SDA, SCL) V -0.3 V IL V CC DC Electrical Characteristics (V = +3.0 to 3.6V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Active Supply Current I C = 15pF per output, SDA = SCL = V 1.4 3 mA CC L CC High-Level Output Voltage V I = -4mA V = min 2.4 V OH OH CC (OUT1-4) Low-Level Output Voltage V I = 3.5mA 0.4 V OL OL (OUT1-4) 3mA sink current 0.4 Low-Level Output Voltage V V OL (SDA) 6mA sink current 0.6 High-Level Input Current I V = V +1.0 A IH IH CC (SDA, SCL) Low-Level Input Current I V = 0.0V -1.0 A IL IL (SDA, SCL) Maxim Integrated 2 www.maximintegrated.com