DGTD65T40S1PT - 650V FIELD STOP IGBT - 艾金森 Dratk SBR8U20SP5 - SBR - 艾金森 Dratk SD101BW - Schottky - 艾金森 Dratk BAV99W - switching diode - 艾金森 Dratk DGTD65T50S1PT - 650V FIELD STOP IGBT - 艾金森 Dratk ZXGD3003E6Q - 40V 5A GATE DRIVER IN SOT26 - 艾金森 Dratk SD101BWS - Schottky - 艾金森 Dratk HD04 - bridge rectifier - 艾金森 Dratk SBR8U60P5 - SBR - 艾金森 Dratk DGTD65T60S2PT - 650V FIELD STOP IGBT - 艾金森 Dratk SD101CW - Schottky - 艾金森 Dratk BAW101 - switching diode - 艾金森 Dratk SBRT05U20LPS - 0.5A TRENCH SCHOTTKY BARRIER RECTIFIER - 艾金森 Dratk HD06 - bridge rectifier - 艾金森 Dratk BAW101Q - DUAL SURFACE MOUNT SWITCHING DIODE - 艾金森 Dratk ZXGD3004E6 - Gate Drivers - 艾金森 Dratk SD101CWS - Schottky - 艾金森 Dratk BAW101S - switching diode - 艾金森 Dratk SD103ASDM - Schottky - 艾金森 Dratk HDS10M - 1.0A SURFACE MOUNT GLASS PASSIVATED BRIDGE RECTIFIER - 艾金森 Dratk ZXGD3004E6Q - 40V 8A GATE DRIVER - 艾金森 Dratk BAW101V - switching diode - 艾金森 Dratk SD103ATW - Schottky - 艾金森 Dratk BAW156 - switching diode - 艾金森 Dratk HDS20M - 2.0A SURFACE MOUNT GLASS PASSIVATED BRIDGE RECTIFIER - 艾金森 Dratk BAW156T - switching diode - 艾金森 Dratk KBJ4005G - bridge rectifier - 艾金森 Dratk ZXGD3005E6 - Gate Drivers - 艾金森 Dratk BAW156TQ - SURFACE MOUNT LOW LEAKAGE DIODE - 艾金森 Dratk SD103AW - Schottky - 艾金森 Dratk SD103AWS - SURFACE MOUNT SCHOTTKY BARRIER DIODE - 艾金森 Dratk BAW56 - switching diode - 艾金森 Dratk KBJ401G - bridge rectifier - 艾金森 Dratk BAW567DW - switching diode - 艾金森 Dratk ZXGD3006E6 - Gate Drivers - 艾金森 Dratk SD103AWSQ - SURFACE MOUNT SCHOTTKY BARRIER DIODE - 艾金森 Dratk BAW56DW - switching diode - 艾金森 Dratk KBJ402G - bridge rectifier - 艾金森 Dratk BAW56HDW - SURFACE MOUNT SWITCHING DIODE ARRAY - 艾金森 Dratk KBJ404G - bridge rectifier - 艾金森 Dratk SD103BW - Schottky - 艾金森 Dratk BAW56HDWQ - SURFACE MOUNT SWITCHING DIODE ARRAY - 艾金森 Dratk ZXGD3006E6Q - Gate Drivers - 艾金森 Dratk KBJ406G - bridge rectifier - 艾金森 Dratk BAW56T - switching diode - 艾金森 Dratk BAW56W - switching diode - 艾金森 Dratk SD103BWS - Schottky - 艾金森 Dratk KBJ408G - bridge rectifier - 艾金森 Dratk DLLFSD01LP3 - ULTRA LOW LEAKAGE SURFACE MOUNT FAST SWITCHING DIODE - 艾金森 Dratk ZXGD3009DY - - 艾金森 Dratk
ISL6545
5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

热度 231

The ISL6545, ISL6545A makes simple work out of implementing a complete control and protection scheme for a DC/DC stepdown converter driving N-Channel MOSFETs in a synchronous buck topology. Since it can work with either 5V or 12V supplies, this one IC can be used in a wide variety of applications within a system. The ISL6545, ISL6545A (hereafter referred to as "ISL6545x", except as needed) integrates the control, gate drivers, output adjustment, monitoring and protection functions into a single 8 Ld SOIC or 10 Ld DFN package.

The ISL6545x provides single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0.6V, with a maximum tolerance of ±1.0% over-temperature and line voltage variations. A selectable fixed frequency oscillator (ISL6545 for 300kHz; ISL6545A for 600kHz) reduces design complexity, while balancing typical application cost and efficiency.

The error amplifier features a 20MHz gain-bandwidth product and 9V/μs 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 lower 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 or +12V Supply Voltage (for bias)
    • 1.0V to 12V VIN Input Range (up to 20V possible with restrictions; see Input Voltage Considerations)
    • 0.6V to VIN Output Range
    • Integrated Gate Drivers use VCC (5V to 12V)
    • 0.6V Internal Reference; ±1.0% tolerance
      • Power Supplies for Microprocessors or Peripherals
        • PCs, Embedded Controllers, Memory Supplies
        • DSP and Core Communications Processor Supplies
        • Subsystem Power Supplies
          • PCI, AGP; Graphics Cards; Digital TV
          • SSTL-2 and DDR/DDR2/DDR3 SDRAM Bus Termination Supply
          • Cable Modems, Set Top Boxes, and DSL Modems
          • Industrial Power Supplies; General Purpose Supplies
          • 5V or 12V-Input DC/DC Regulators
          • Low-Voltage Distributed Power Supplies
 
Alternatives
Parameters ISL6545 ISL6545A ISL8105 ISL8105A
VIN (min) (V)1 1 1 1
VIN (max) (V)12 12 12 12
VOUT (min) (V)0.6 0.6 0.6 0.6
VOUT (max) (V)5 5 5 5
IOUT (max) (A)25 25 25 25
VBIAS (min)4.5 V 4.5 V 4.9 V 4.9 V
VBIAS (max)14.4 V 14.4 V 14.4 V 14.4 V
IS (typ)3.2 mA 3.2 mA 3.2 mA 3.2 mA
Qualification LevelStandard Standard Standard Standard

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