MAX15049ETJ+T Maxim Integrated Products, MAX15049ETJ+T Datasheet
MAX15049ETJ+T
Specifications of MAX15049ETJ+T
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MAX15049ETJ+T Summary of contents
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... DDR Power Supply Base-Station Power Supplies Telecom and Networking Power Supplies RAID Control Power Supplies Set-Top Boxes _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Triple-Output Buck Controllers with Tracking/Sequencing S 4.7V to 23V or 5V ± ...
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Triple-Output Buck Controllers with Tracking/Sequencing ABSOLUTE MAXIMUM RATINGS IN, LX_ to SGND ...................................................-0.3V to +30V BST_ to SGND .......................................................-0.3V to +30V BST_ to LX_ .............................................................-0.3V to +6V REG, DREG_, EN_ SGND .............................-0.3V to +6V PGOOD, FB_, COMP_ to ...
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ELECTRICAL CHARACTERISTICS (continued 12V 5V REG DREG_ noted. Typical values are +25NC.) (Note PARAMETER SYMBOL OSCILLATOR Switching Frequency Range (Each Converter) Switching ...
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Triple-Output Buck Controllers with Tracking/Sequencing ELECTRICAL CHARACTERISTICS (continued 12V 5V REG DREG_ noted. Typical values are +25NC.) (Note PARAMETER SYMBOL ENABLE/PGOOD EN_ ...
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0V DREG_ REG PGND_ CONVERTER 1 OUTPUT VOLTAGE vs. LOAD CURRENT 3.330 3.328 3.325 3.323 3.320 3.318 3.315 3.313 V = 12V IN 3.310 3.308 ...
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Triple-Output Buck Controllers with Tracking/Sequencing (V = 12V 0V DREG_ REG PGND_ OPERATING SUPPLY CURRENT vs. SWITCHING FREQUENCY 15 DRIVERS SWITCHING 14 NO-OUTPUT LOAD V = 12V ...
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0V DREG_ REG PGND_ COINCIDENT SHUTDOWN (MAX15048) V EN1 V OUT1 V OUT2 V OUT3 WITH FIGURE 10 CONFIGURED FOR COINCIDENT TRACKING 1ms/div CHANNEL 2 SHORT CIRCUIT (COINCIDENT TRACKING) ...
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Triple-Output Buck Controllers with Tracking/Sequencing (V = 12V 0V DREG_ REG PGND_ 120° OUT-OF-PHASE OPERATION V LX1 V LX2 V LX3 1 µ s/div CONVERTER 1 SHORT-CIRCUIT CONDITION (HICCUP MODE) V OUT1 ...
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0V DREG_ REG PGND_ STARTUP INTO PREBIASED OUTPUT (1.2V PREBIASED) V EN1 V OUT1 1ms/div LOAD-TRANSIENT RESPONSE (I = 1.5A TO 3A) 0UT1 I OUT1 V OUT1 (AC-COUPLED) V ...
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Triple-Output Buck Controllers with Tracking/Sequencing TOP VIEW *EXPOSED PAD. PIN NAME Oscillator Timing Resistor Connection. Connect a 15.6kI to 93.75kI resistor from RT to SGND program the switching frequency from 200kHz to 1.2MHz. Analog Ground. Connect SGND ...
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PIN NAME Controller Power-Good Output. Pull up PGOOD with a resistor to a positive voltage below 5.5V. For the MAX15048, PGOOD output releases when all three V 12 PGOOD MAX15049, PGOOD output releases when all three controllers are out of ...
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Triple-Output Buck Controllers with Tracking/Sequencing IN LDO REG EN 0.60V 0.55V 0.6V THERMAL REF SHDN DOWN1 V REF DIGITAL CLK1 SOFT-START AND -STOP GM FB1 COMP1 CLK1 RT OSC RAMP LEVEL SHIFT CLK2 CLK3 12 _____________________________________________________________________________________ 0.60V EN1 0.55V V ...
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V REF DOWN2/3 DIGITAL V REF CLK2/3 SOFT-START AND -STOP V R2/3 GM EN2/3 FB2/3 COMP2/3 CLK2/3 RAMP LEVEL SHIFT MAX15048 PWM CONTROLLERS 2 AND 3 ______________________________________________________________________________________ Triple-Output Buck Controllers with Tracking/Sequencing Functional Diagrams (continued) SHDN OFF OVL CONFIG OVL2/3 ...
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Triple-Output Buck Controllers with Tracking/Sequencing IN LDO REG EN 0.60V 0.55V 0.6V THERMAL REF SHDN DOWN1 V REF DIGITAL CLK1 SOFT-START GM FB1 COMP1 CLK1 RT OSC RAMP CLK2 CLK3 14 _____________________________________________________________________________________ Functional Diagrams (continued) 0.60V EN1 0.55V V REGOK ...
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V REF DIGITAL CLK2/3 SOFT-START GM PREBIAS FB2/3 COMP2/3 CLK2/3 RAMP LEVEL CLK SHIFT ______________________________________________________________________________________ Triple-Output Buck Controllers with Tracking/Sequencing Functional Diagrams (continued) 0.60V EN2/3 0.55V OFF2/3 SHDN OVL2/3 OVERLOAD 2/3 MAX MANAGEMENT SET DOMINANT LATCH S ...
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Triple-Output Buck Controllers with Tracking/Sequencing Detailed Description The MAX15048/MAX15049 are triple-output, PWM, step- down, DC-DC controllers with tracking and sequencing options. The devices operate over the 4.7V to 23V or 5V Q10% input voltage range. Each PWM controller pro- vides ...
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MOSFET Gate Drivers and Internal Boost Switch DREG_ is the supply input for the low-side MOSFET driver. Connect DREG_ to REG externally. Every time the low-side MOSFET switches on, high peak current is drawn from DREG_ for a short time. ...
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Triple-Output Buck Controllers with Tracking/Sequencing MAX15049 Output-Voltage Sequencing (EN_) In Figure 1c, when sequencing, the enable input must be above 0.6V for each PWM controller to start. The V outputs and EN_ inputs can be daisy-chained to gener- ate power ...
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COUNT CURRENT LIMIT N CL CLR COUNT CLR CLR Figure 3. Hiccup-Mode Block Diagram just before the beginning of a new PWM cycle, the con- troller skips that cycle. During severe overload or ...
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Triple-Output Buck Controllers with Tracking/Sequencing ( programmable between 200kHz and 1.2MHz SW (see the Setting the Switching Frequency section). The peak-to-peak inductor current (DI the peak-to-peak output ripple, is worst at the maximum input voltage. See the Output-Capacitor ...
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Use the following equations to calculate the required ESR, ESL, and capacitance value during a load step: ∆ V ESR = ESR I STEP I × t RESPONSE STEP C = OUT ∆ ∆ V × t ESL ...
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Triple-Output Buck Controllers with Tracking/Sequencing Below are equations that define the power modulator MOD(DC) V RAMP π × × ZERO, ESR π × 2 ESR C ESR ...
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The desired (compensated) rolloff follows a -20dB/ decade slope (and commensurate 90° of phase shift), and, in this example, occurs at approximately six times the uncompensated crossover frequency, f example, a Type II compensator provides stable closed- loop operation, leveraging ...
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Triple-Output Buck Controllers with Tracking/Sequencing As with the previous example, the actual gain and phase response is overlaid on the power modulator’s asymp- totic gain response readily observed that the more dramatic gain and phase transition at or ...
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Design procedures for both Type II and Type III compen- sators are shown below. Type II: Compensation when f CO When the f is lower than f ZERO, ESR a Type II compensation network provides the neces- sary closed-loop response. ...
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Triple-Output Buck Controllers with Tracking/Sequencing Type III: Compensation when previously indicated, the position of the output capac- itor’s inherent ESR zero is critical in designing an appro- priate compensation network. When low-ESR ceramic output capacitors are used, ...
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P2 8) Place a second pole ( 2 below one-half the switching frequency π × × Calculate R using the following equation FB_ = × ...
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Triple-Output Buck Controllers with Tracking/Sequencing IN V OUT3 Figure 8. MAX15048 Ratiometric Tracker Typical Operating Circuit 28 _____________________________________________________________________________________ DH3 LX3 BST3 DL3 MAX15048 PGND3 FB3 COMP3 EN3 V REG IN EN1 IN DH1 LX1 BST1 DL1 PGND1 FB1 COMP1 V ...
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IN V OUT3 V OUT2 Figure 9. MAX15049 Sequencer Typical Operating Circuit ______________________________________________________________________________________ Triple-Output Buck Controllers with Tracking/Sequencing DH3 LX3 BST3 DL3 MAX15049 PGND3 FB3 COMP3 EN3 V REG IN EN1 IN DH1 LX1 BST1 DL1 PGND1 FB1 COMP1 V ...
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Triple-Output Buck Controllers with Tracking/Sequencing 470µF 22µF 22µF V OUT3 1µH (1.2V/6A) 0.1µF 100µF 100µF 1500pF 15kI V OUT2 22pF Figure 10. Evaluation Kit Schematic Configured for the MAX15049 (Sequencer) 30 _____________________________________________________________________________________ V IN 10µF 1µF 0.1µF DH3 LX3 BST3 ...
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