MAX5039 MAXIM [Maxim Integrated Products], MAX5039 Datasheet
MAX5039
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MAX5039 Summary of contents
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... CORE and I/O sup- plies. This eliminates stresses on the processor. The MAX5039/MAX5040 shut down both the CORE and I/O supplies if either one is shorted or otherwise fails to come up. The MAX5040 provides a power-OK (POK) signal that ...
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Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs ABSOLUTE MAXIMUM RATINGS (All Voltages Referenced to GND) SDO, and POK ..................................-0.3V to +14V V , NDRV, CC CORE_FB, UVLO, I/O_SENSE, I/O, CORE ..........-0.3V to +4.25V All Pins to V (except POK)............................................. +0.3V ...
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... V falls. For some V below Note 3: This undervoltage lockout disables the MAX5039/MAX5040 at V drops below the threshold, SDO goes low, the bleeder turns off, and POK is high impedance. ate. When V CC Note 4: In order to regulate correctly, V Note 5: I/O and CORE valid mean the voltages on these pins have settled within their target specifications for normal operation. ...
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... SYSTEM POWER-UP/POWER-DOWN WITHOUT MAX5039/MAX5040 (V RISING BEFORE V ) I/O CORE MAX5039/40 toc02 V CC 5V/div V CC I/O I/O CORE AND CORE 1V/div 5ms/div CORE REGULATOR LOOP BODE PLOT (SEE FIGURE 9) MAX5039/40 toc04 180 3.3V 1. I/O CORE 150 PHASE 120 GAIN 0 -30 -60 1k 10k 100k ...
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V = 1.8V 3.3V CORE I/O V vs.I SDO SDO(SOURCE -40° 4. +85° +25° -40°C V ...
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... GND. Set trip point below minimum V CC falls below V CORE_FB C_REF = CORE_FB C_REF , a latched FAULT is generated. During a FAULT, MAX5039/MAX5040 continue to falls below 2.5V, NDRV goes to GND rises above V , NDRV goes to GND. CORE_FB C_REF , POK (MAX5040 only) goes low. FAULT is latched if this condition lasts longer CC ...
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Performance During Typical Operation Scope shots are of the MAX5040 EV kit. Figures 1 through 8 demonstrate system performance of the MAX5040 under various power-up, power-down, and fault conditions. In some cases (described in detail below), startup or shutdown of ...
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... AND POK 5V/div I/O AND CORE 1V/div Figure 4. System Power-Up/Power-Down Without MAX5039/ MAX5040 (V CORE Rising Before V I/O ) NDRV goes high, and POK goes low immediately. NDRV shorts the I/O supply to the CORE supply, bring- ing the supplies down together. After 15ms, the MAX5040 latches a fault and SDO goes low turning off the supplies ...
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... MAX5039/MAX5040 turn the external N- TH channel MOSFET on by driving NDRV high to V Whenever SDO is high, the MAX5039/MAX5040 track the time that NDRV is in regulation mode or driven high. If NDRV is in regulation mode or driven high for longer than (15ms), a fault occurs and SDO is pulled low. ...
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Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs 800mV CORE_FB UVLO 1.23V I/O CORE BLEED GND I/O_SENSE 1.23V 10 ______________________________________________________________________________________ Functional Diagram MAX5040 V CC 400mV FAULT GENERATOR FAULT 15ms TIMER NDRV SDO POK ...
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... UVLO R8 10kΩ 1% Figure 9. Typical Application Circuit for the MAX5039 Designing with MAX5039/MAX5040 The MAX5039/MAX5040 provide intelligent control to power systems where two power supplies need track- ing. Follow the steps below for designing with the MAX5039/MAX5040: 1) Select an appropriate external N-channel MOSFET (see the N-Channel MOSFET Selection section) ...
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... V CC down/brownout condition. , UVCC The hold-up capacitor and provides the power to the MAX5039/MAX5040 to keep them in operation even after V down. The MAX5039/MAX5040 prevent premature turning on of the CORE and I/O power supplies during power-up by actively holding SDO low as soon as V above 0 ...
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... CORE and I/O power supplies. Similar to the shutdown condition, the MAX5039/MAX5040 keep CORE and I/O voltages together important that V operating voltage range in order to keep the MAX5039/ MAX5040 operating to provide tracking until the output voltages have discharged to a safe level. Figure 11 illus- trates a method to prolong V down/brownout condition ...
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Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs of the maximum output current rating of the CORE or I/O power supplies is adequate. However, care should be taken when selecting this MOSFET to make sure it is capable of sustaining all ...
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... Resistor resolution error • Resistor tolerance error • Resistor temperature drift (TCR) error x Z θJA • MAX5039/MAX5040 reference error • Loop-gain error For example: • V CORE • V I/O • Maximum voltage that I/O can exceed CORE without damage to the processor: • ...
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... When using a resistor-divider, R7 and R8, from an input voltage rail (V AMOUNT mable UVLO feature allows V (0.1% Res.) (%) before MAX5039/MAX5040 turn the system power sup- plies on together. V ±0.1 system power supplies and it can be the same as V The UVLO pin also provides the system a way to turn ± ...
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Follow the guidelines below to program the UVLO voltage: 1) Determine the V tolerance; ±5% is common Determine the V rising threshold tolerance: UVLO Undervoltage lockout rising trip threshold, V tolerance: 1.230V ±2.5% Programming resistor tolerance: pick ...
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Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs Programming I/O_SENSE Voltage (MAX5040 Only) See the application circuit examples in Figures 9 and 10. I/O_SENSE is used to monitor the I/O output voltage or any other voltage. The result is reported by ...
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... SDO I/O I PowerPC/ DSP/ASIC UVLO V CORE CORE GND SDO V UVLO GND I/O_SENSE TRANSISTOR COUNT: 1272 PROCESS: BiCMOS Pin Configurations 1 8 NDRV 2 7 I/O MAX5039 3 6 CORE 4 5 CORE_FB µMAX 1 10 NDRV 2 9 I/O CC MAX5040 3 8 CORE 4 7 CORE_FB 5 6 POK µMAX Chip Information ...
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Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ÿ 0.50±0.1 0.6±0.1 1 0.6±0.1 D TOP ...
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For the latest package outline information www.maxim-ic.com/packages ÿ 0.50±0.1 0.6±0.1 1 0.6±0.1 TOP VIEW ...