Datasheet LTM4601AHV (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | 12A, 28VIN DC/DC µModule Regualtor with PLL, Output Tracking and Margining |
| Pages / Page | 30 / 9 — Decoupling requireMenTs TA = 25°C, VIN = 12V. Use Figure 1 configuration. … |
| File Format / Size | PDF / 1.0 Mb |
| Document Language | English |
Decoupling requireMenTs TA = 25°C, VIN = 12V. Use Figure 1 configuration. SYMBOL. PARAMETER. CONDITIONS. MIN. TYP. MAX. UNITS
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LTM4601AHV
Decoupling requireMenTs TA = 25°C, VIN = 12V. Use Figure 1 configuration. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
CIN External Input Capacitor Requirement IOUT = 12A 20 30 µF (VIN = 4.5V to 28V, VOUT = 2.5V) COUT External Output Capacitor Requirement IOUT = 12A 100 200 µF (VIN = 4.5V to 28V, VOUT = 2.5V)
operaTion Power Module Description
in an overvoltage condition, internal top FET Q1 is turned The LTM4601AHV is a standalone nonisolated switching off and bottom FET Q2 is turned on and held on until the mode DC/DC power supply. It can deliver up to 12A of overvoltage condition clears. DC output current with some external input and output Pulling the RUN pin below 1V forces the controller into its capacitors. This module provides precisely regulated output shutdown state, turning off both Q1 and Q2. At low load voltage programmable via one external resistor from 0.6VDC current, the module works in continuous current mode by to 5.0VDC over a 4.5V to 28V wide input voltage. Typical default to achieve minimum output ripple voltage. application schematics are shown in Figures 19 and 20. When DRVCC pin is connected to INTVCC an integrated The LTM4601AHV has an integrated constant on-time 5V linear regulator powers the internal gate drivers. If a current mode regulator, ultralow RDS(ON) FETs with fast 5V external bias supply is applied on the DRVCC pin, then switching speed and integrated Schottky diodes. The typical an efficiency improvement will occur due to the reduced switching frequency is 850kHz at full load. With current power loss in the internal linear regulator. This is especially mode control and internal feedback loop compensation, true at the high end of the input voltage range. the LTM4601AHV module has sufficient stability margins The LTM4601AHV has a very accurate differential remote and good transient performance under a wide range of sense amplifier with very low offset. This provides for operating conditions and with a wide range of output very accurate output voltage measurement at the load. capacitors, even all ceramic output capacitors. The MPGM pin, MARG0 pin and MARG1 pin are used to Current mode control provides cycle-by-cycle fast current support voltage margining, where the percentage of margin limit. Besides, foldback current limiting is provided in an is programmed by the MPGM pin, and the MARG0 and overcurrent condition while VFB drops. Internal overvolt- MARG1 select margining. age and undervoltage comparators pull the open-drain The PLLIN pin provides frequency synchronization of the PGOOD output low if the output feedback voltage exits a device to an external clock. The TRACK/SS pin is used ±10% window around the regulation point. Furthermore, for power supply tracking and soft-start programming. 4601ahvfc For more information www.linear.com/LTM4601AHV 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photos Related Parts
Decoupling requireMenTs TA = 25°C, VIN = 12V. Use Figure 1 configuration. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
CIN External Input Capacitor Requirement IOUT = 12A 20 30 µF (VIN = 4.5V to 28V, VOUT = 2.5V) COUT External Output Capacitor Requirement IOUT = 12A 100 200 µF (VIN = 4.5V to 28V, VOUT = 2.5V)
operaTion Power Module Description
in an overvoltage condition, internal top FET Q1 is turned The LTM4601AHV is a standalone nonisolated switching off and bottom FET Q2 is turned on and held on until the mode DC/DC power supply. It can deliver up to 12A of overvoltage condition clears. DC output current with some external input and output Pulling the RUN pin below 1V forces the controller into its capacitors. This module provides precisely regulated output shutdown state, turning off both Q1 and Q2. At low load voltage programmable via one external resistor from 0.6VDC current, the module works in continuous current mode by to 5.0VDC over a 4.5V to 28V wide input voltage. Typical default to achieve minimum output ripple voltage. application schematics are shown in Figures 19 and 20. When DRVCC pin is connected to INTVCC an integrated The LTM4601AHV has an integrated constant on-time 5V linear regulator powers the internal gate drivers. If a current mode regulator, ultralow RDS(ON) FETs with fast 5V external bias supply is applied on the DRVCC pin, then switching speed and integrated Schottky diodes. The typical an efficiency improvement will occur due to the reduced switching frequency is 850kHz at full load. With current power loss in the internal linear regulator. This is especially mode control and internal feedback loop compensation, true at the high end of the input voltage range. the LTM4601AHV module has sufficient stability margins The LTM4601AHV has a very accurate differential remote and good transient performance under a wide range of sense amplifier with very low offset. This provides for operating conditions and with a wide range of output very accurate output voltage measurement at the load. capacitors, even all ceramic output capacitors. The MPGM pin, MARG0 pin and MARG1 pin are used to Current mode control provides cycle-by-cycle fast current support voltage margining, where the percentage of margin limit. Besides, foldback current limiting is provided in an is programmed by the MPGM pin, and the MARG0 and overcurrent condition while VFB drops. Internal overvolt- MARG1 select margining. age and undervoltage comparators pull the open-drain The PLLIN pin provides frequency synchronization of the PGOOD output low if the output feedback voltage exits a device to an external clock. The TRACK/SS pin is used ±10% window around the regulation point. Furthermore, for power supply tracking and soft-start programming. 4601ahvfc For more information www.linear.com/LTM4601AHV 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photos Related Parts
