74LVC1G07GS - Buffer with open-drain output - 艾金森 Dratk 74LVC1G98GN - Low-power configurable multiple function gate - 艾金森 Dratk 74LVC1G07GV - Buffer with open-drain output - 艾金森 Dratk 74LVCH2T45DC - Dual supply translating transceiver; 3-state - 艾金森 Dratk BZX84J-B30 - Single Zener diodes - 艾金森 Dratk 74LVC1G98GS - Low-power configurable multiple function gate - 艾金森 Dratk 74HC27D-Q100 - Triple 3-input NOR gate - 艾金森 Dratk 74LVC1G07GW - Buffer with open-drain output - 艾金森 Dratk 74LVCH2T45GN - Dual supply translating transceiver; 3-state - 艾金森 Dratk 74LVC1G07GX - Buffer with open-drain output - 艾金森 Dratk 74HC27PW-Q100 - Triple 3-input NOR gate - 艾金森 Dratk 74LVC1G98GV - Low-power configurable multiple function gate - 艾金森 Dratk 74LVCH2T45GS - Dual supply translating transceiver; 3-state - 艾金森 Dratk BZX84J-B33 - Single Zener diodes - 艾金森 Dratk 74HCT27BQ-Q100 - Triple 3-input NOR gate - 艾金森 Dratk 74LVC1G07GX4 - Buffer with open-drain output - 艾金森 Dratk 74LVCH2T45GT - Dual supply translating transceiver; 3-state - 艾金森 Dratk BZX84J-B36 - Single Zener diodes - 艾金森 Dratk 74LVC1G98GW - Low-power configurable multiple function gate - 艾金森 Dratk 74HCT27D-Q100 - Triple 3-input NOR gate - 艾金森 Dratk 74LVC8T245BQ - 8-bit dual supply translating transceiver; 3-state - 艾金森 Dratk BZX84J-B39 - Single Zener diodes - 艾金森 Dratk 74LVC1G99DP - Ultra-configurable multiple function gate; 3-state - 艾金森 Dratk 74LVC1G16GM - Single buffer - 艾金森 Dratk 74HCT27PW-Q100 - Triple 3-input NOR gate - 艾金森 Dratk BZX84J-B43 - Single Zener diodes - 艾金森 Dratk 74LVC8T245PW - 8-bit dual supply translating transceiver; 3-state - 艾金森 Dratk 74LVC1G16GW - Single buffer - 艾金森 Dratk 74LVC1G99GN - Ultra-configurable multiple function gate; 3-state - 艾金森 Dratk 74HC30D-Q100 - 8-input NAND gate - 艾金森 Dratk 74LVCH8T245BQ - 8-bit dual supply translating transceiver; 3-state - 艾金森 Dratk 74LVC1G34GM - Single buffer - 艾金森 Dratk 74LVC1G99GS - Ultra-configurable multiple function gate; 3-state - 艾金森 Dratk 74HC30PW-Q100 - 8-input NAND gate - 艾金森 Dratk BZX84J-B47 - Single Zener diodes - 艾金森 Dratk 74LVC1G34GN - Single buffer - 艾金森 Dratk 74HCT30D-Q100 - 8-input NAND gate - 艾金森 Dratk 74LVC1G34GS - Single buffer - 艾金森 Dratk BZX84J-B51 - Single Zener diodes - 艾金森 Dratk 74LVC1G99GT - Ultra-configurable multiple function gate; 3-state - 艾金森 Dratk 74LVC1G34GV - Single buffer - 艾金森 Dratk 74HCT30PW-Q100 - 8-input NAND gate - 艾金森 Dratk 74LVCH8T245PW - 8-bit dual supply translating transceiver; 3-state - 艾金森 Dratk BZX84J-B56 - Single Zener diodes - 艾金森 Dratk 74LVC2G14GM - Dual inverting Schmitt trigger with 5 V tolerant input - 艾金森 Dratk 74HC32BQ-Q100 - Quad 2-input OR gate - 艾金森 Dratk HEF4104BT - Quad low-to-high voltage translator with 3-state outputs - 艾金森 Dratk 74LVC1G34GW - Single buffer - 艾金森 Dratk 74LVC2G14GN - Dual inverting Schmitt trigger with 5 V tolerant input - 艾金森 Dratk BZX84J-B62 - Single Zener diodes - 艾金森 Dratk
ISL6520A
Single Synchronous Buck Pulse-Width Modulation (PWM) controller

热度 10

The ISL6520A makes simple work out of implementing a complete control and protection scheme for a DC/DC stepdown converter. Designed to drive N-Channel MOSFETs in a synchronous buck topology, the ISL6520A integrates the control, output adjustment, monitoring and protection functions into a single 8 Lead package.

The ISL6520A provides simple, single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0.8V, with a maximum tolerance of ±1.5% over-temperature and line voltage variations. A fixed frequency oscillator reduces design complexity, while balancing typical application cost and efficiency.

The error amplifier features a 15MHz gain-bandwidth product and 8V/ms slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%.

Protection from overcurrent conditions is provided by monitoring the rDS(ON) of the upper MOSFET to inhibit PWM operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor.

  • Operates from +5V Input
  • 0.8V to VIN Output Range
    • 0.8V Internal Reference
    • ±1.5% Over Line Voltage and Temperature
      • Power Supplies for Microprocessors
        • PCs
        • Embedded Controllers
        • Subsystem Power Supplies
          • PCI/AGP/GTL+ Buses
          • ACPI Power Control
          • SSTL-2 and DDR SDRAM Bus Termination Supply
          • Cable Modems, Set Top Boxes, and DSL Modems
          • DSP and Core Communications Processor Supplies
          • Memory Supplies
          • Personal Computer Peripherals
          • Industrial Power Supplies
          • 5V-Input DC/DC Regulators
          • Low-Voltage Distributed Power Supplies
 
Alternatives
Parameters ISL6520A ISL6439 ISL6526 ISL6526A
VIN (min) (V)2.5 3.3 2.5 2.5
VIN (max) (V)5 5 5 5
VOUT (min) (V)0.8 0.8 0.8 0.8
VOUT (max) (V)5 3.3 5 5
IOUT (max) (A)20 20 20 20
VBIAS (min)5 V 3.3 V 3.3 V 3.3 V
VBIAS (max)5 V 3.3 V 5 V 5 V
IS (typ)3.2 mA 6.9 mA 6.9 mA 6.9 mA
Qualification LevelStandard Standard Standard Standard

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