MAX8505
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MAX8505

3A, 1MHz, 1% Accurate, Internal Switch Step-Down Regulator with Power-OK

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $4.08
Features
  • Saves Space—4.9mm x 6mm Footprint, 1µH Inductor, 47µF Ceramic Output Capacitor
  • Input Voltage Range
    • 2.6V to 5.5V
    • Down to 2.25V with Bias Supply
  • 0.8V to 0.85 x VIN, 3A Output
  • Ceramic or Polymer Capacitors
  • ±1% Output Accuracy over Load, Line, and Temperature
  • Fast Transient Response
  • Adjustable Soft-Start
  • In-Regulation Soft-Start Limits Output-Voltage Dips at Power-On
  • POK Monitors Output Voltage
Additional Details
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The MAX8505 step-down regulator operates from a 2.6V to 5.5V input and generates an adjustable output voltage from 0.8V to 0.85 x VIN at up to 3A. With a 2.6V to 5.5V bias supply, the input voltage can be as low as 2.25V.

The MAX8505 integrates power MOSFETs and operates at 1MHz/500kHz switching frequency to provide a compact design. Current-mode pulse-width-modulated (PWM) control simplifies compensation with ceramic or polymer output capacitors and provides excellent transient response.

The MAX8505 features 1% accurate output over load, line, and temperature variations. Adjustable soft-start is achieved with an external capacitor. During the soft-start period, the voltage-regulation loop is active. This limits the voltage dip when the active devices, such as microprocessors or ASICs connected to the MAX8505's output, apply a sudden load current step upon passing their undervoltage thresholds.

The MAX8505 features current-limit, short-circuit, and thermal-overload protection and enables a rugged design. Open-drain power-OK (POK) monitors the output voltage.

Applications

  • µP/ASIC/DSP/FPGA Core and I/O Supplies
  • Chipset Supplies
  • Network and Telecom Equipment
  • Server, RAID, and Storage Systems
Part Models 2
1ku List Price Starting From $4.08

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX8505EEE+
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MAX8505EEE+T
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX8505EVKIT

Evaluation Kit for the MAX8505

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MAX8505EVKIT

Evaluation Kit for the MAX8505

Evaluation Kit for the MAX8505

Features and Benefits

  • 2.6V to 5.5V Input Voltage Range
  • Output Voltage
    • Preset to 1.2V (by External Voltage-Divider)
    • 0.8V to 85% of VIN Output Voltage Range
  • 3A Output Current
  • 1MHz Switching Frequency
  • POK (Power-OK) Output
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Detail

The MAX8505 evaluation kit (EV kit) provides a 1.2V output voltage from a 2.6V to 5.5V input source, and delivers 3A output current. The MAX8505 EV kit includes the MAX8505 step-down switching regulator with an internal high-efficiency switch. The EV kit operates in PWM mode at a fixed 1MHz frequency, allowing use of the small-size external components.

The MAX8505 EV kit is a fully assembled and tested surface-mount printed circuit board. It can also be used to evaluate other output voltages, from 0.8V up to 85% of VIN, by changing the feedback resistors R2 and R3.

Applications

  • µP/ASIC/DSP/FPGA Core and I/O Supplies
  • Chipset Supplies
  • Network and Telecom Equipment
  • Server, RAID, and Storage Systems

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