mp4462 MPS, mp4462 Datasheet
mp4462
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mp4462 Summary of contents
Page 1
... The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, operation. By switching at 4MHz, the MP4462 is able to prevent EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications. The MP4462 is available in small 3mm x 3mm QFN10 and SOIC8E packages. ...
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... FREQ COMP 6 GND Temperature Part Number** –40°C to +85°C MP4462DN ** For Tape & Reel, add suffix –Z (e.g. MP4462DN–Z) For RoHS Compliant Packaging, add suffix –LF (e.g. MP4462DN–LF–Z) (1) Recommended Operating Conditions Supply Voltage V + 0.3V Output Voltage V IN Operating Temperature .............–40°C to +85°C Thermal Resistance 3x3 QFN10 ............................. 50 ...... 12... ° ...
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... Bootstrap. This is the positive power supply for the internal floating high-side MOSFET 8 10 BST driver. Connect a bypass capacitor between this pin and SW pin. MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER (continued) = +25°C, unless otherwise noted. A Symbol Condition 0V < V < 0. 45kΩ ...
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... Steady State I = 0.1A OUT V OUT AC Coupled 10mV/div 10V/div 1A/div. MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER = +25°C, unless otherwise noted. A Steady State OUT V OUT AC Coupled 20mV/div 10V/div 1A/div. ...
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... I L 1A/div. Short Circuit Entry I = 0.1A to Short OUT V OUT 2V/div 1A/div. MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER (continued) = +25°C, unless otherwise noted. A Shutdown I = 0.1A OUT V EN 5V/div. V OUT 2V/div 10V/div ...
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... GND Figure 1—Functional Block Diagram frequency, PWM Control switching At moderate to high output current, the MP4462 operates in a fixed frequency, peak current control mode to regulate the output voltage. A PWM cycle is initiated by the internal clock. The power MOSFET is turned on and remains on until its current reaches the value set by the COMP voltage ...
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... When VIN is lower than 3.0V, the output decreases. Enable Control The MP4462 has a dedicated enable control pin (EN). With high enough input voltage, the chip can be enabled and disabled by EN which has positive logic. Its falling threshold is a precision 1 ...
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... VIN low and thermal shutdown. In the shutdown procedure, power MOSFET is turned off first to avoid any fault triggering. The COMP voltage and the internal supply rail are then pulled down. Programmable Oscillator The MP4462 oscillating frequency is set by an external resistor, R ground. The value of R from: internal power limited ...
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... OUT About 20µA current from high side BS circuitry can be seen at the output when the MP4462 load. In order to absorb this small amount of current, keep R2 under 40KΩ. value for R2 can be 40.2kΩ. With this value, R1 can be determined by: = × − ...
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... Table 2—Diode Selection Guide Voltage/ Diodes Current Rating B340A-13-F 40V, 3A CMSH3-40MA 40V, 3A MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER Table 1—Inductor Selection Guide Max DCR (Ω) Current Rating (A) 2.2 0.019 3.3 0.024 4.7 0.033 10 0.035 15 0 ...
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... IN S The characteristics of the output capacitor also affect the stability of the regulation system. The MP4462 can be optimized for a wide range of capacitance and ESR values. MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER ...
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... To optimize the compensation components for conditions not listed in Table 3, the following procedure can be used. MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER 1. Choose the compensation resistor (R3) to set the desired crossover frequency. Determine the is used to ...
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... The switching frequency of MP4462 can be programmed up to 4MHz by an external resistor. Please pay attention to the following if the switching frequency is above 2MHz. The minimum on time of MP4462 is about 80ns (typ). Pulse skipping operation can be seen more easily at higher switching frequency due to the minimum on time. Recommended operating voltage is 12V or below, and 24V or below at 2MHz ...
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... MP4462 SW Figure 3—External Bootstrap Diode MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER This diode is also recommended for high duty cycle operation (when V V (<5Vin) applications load or light load, the converter may operate in pulse skipping mode in order to maintain the output voltage in regulation ...
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... TYPICAL APPLICATION CIRCUITS 36V EN Figure 4—1.8V Output Typical Application Schematic V IN 10V - 36V EN Figure 5—5V Output Typical Application Schematic MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER C4 100nF 10 8,9 BST 1,2 SW VIN MP4462 ...
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... PIN 1 ID MARKING PIN 1 ID INDEX AREA TOP VIEW 0.20 REF SIDE VIEW 2.90 0.70 1.70 0.25 0.50 RECOMMENDED LAND PATTERN MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER 3mm x 3mm QFN10 0.30 0.50 0.18 10 0.30 2.90 3.10 0.50 BSC 6 BOTTOM VIEW PIN 1 ID OPTION A R0.20 TYP. 0.80 1 ...
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... Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP4462 Rev. 0.9 7/31/2008 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER SOIC8E (EXPOSED PAD) 0.150(3.80) 0.228(5.80) 0.157(4.00) 0.244(6.20) SEE DETAIL " ...