Datasheet LTM4603HV (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | 6A, 28VIN DC/DC μModule with PLL, Output Tracking and Margining |
| Pages / Page | 26 / 10 — operaTion Power Module Description |
| File Format / Size | PDF / 316 Kb |
| Document Language | English |
operaTion Power Module Description
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LTM4603HV
operaTion Power Module Description
in an overvoltage condition, internal top FET Q1 is turned The LTM4603HV 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 6A of DC overvoltage condition clears. output current with few external input and output capaci- Pulling the RUN pin below 1V forces the controller into its tors. This module provides precisely regulated output volt- shutdown state, turning off both Q1 and Q2. At low load age programmable via one external resistor from 0.6VDC to current, the module works in continuous current mode by 5.0VDC over a 4.5V to 28V wide input voltage. The typical default to achieve minimum output voltage ripple. application schematic is shown in Figure 20. When DRVCC pin is connected to INTVCC an integrated The LTM4603HV 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 typi- an efficiency improvement will occur due to the reduced cal switching frequency is 1MHz 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 higher input voltage range. the LTM4603HV module has sufficient stability margins The LTM4603HV 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 sensing at the load. The capacitors, even all ceramic output capacitors. MPGM pin, MARG0 pin and MARG1 pin are used to sup- Current mode control provides cycle-by-cycle fast current port 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. 4603hvfa 10 For more information www.linear.com/LTM4603HV Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Related Parts
operaTion Power Module Description
in an overvoltage condition, internal top FET Q1 is turned The LTM4603HV 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 6A of DC overvoltage condition clears. output current with few external input and output capaci- Pulling the RUN pin below 1V forces the controller into its tors. This module provides precisely regulated output volt- shutdown state, turning off both Q1 and Q2. At low load age programmable via one external resistor from 0.6VDC to current, the module works in continuous current mode by 5.0VDC over a 4.5V to 28V wide input voltage. The typical default to achieve minimum output voltage ripple. application schematic is shown in Figure 20. When DRVCC pin is connected to INTVCC an integrated The LTM4603HV 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 typi- an efficiency improvement will occur due to the reduced cal switching frequency is 1MHz 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 higher input voltage range. the LTM4603HV module has sufficient stability margins The LTM4603HV 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 sensing at the load. The capacitors, even all ceramic output capacitors. MPGM pin, MARG0 pin and MARG1 pin are used to sup- Current mode control provides cycle-by-cycle fast current port 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. 4603hvfa 10 For more information www.linear.com/LTM4603HV Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Related Parts
