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High-Efficiency, 10A, PWM Internal-Switch Step-Down Regulator

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.3
VIN (V) (max) 3.6
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 3.1
IOUT1 (A) (max) 10
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2400
Design Tools EE-Sim
Package/Pins TQFN/32
Budgetary
Price (See Notes)
7.19
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.3
VIN (V) (max) 3.6
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 3.1
IOUT1 (A) (max) 10
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2400
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=5532', '')
Package/Pins TQFN/32
Budgetary
Price (See Notes)
7.19

Key Features

  • Internal 8mΩ On-Resistance MOSFETs
  • 10A Output PWM Step-Down Regulator
  • ±1% Output Accuracy over Load, Line, and Temperature
  • Operates from 2.3V to 3.6V Input Supply
  • Adjustable Output from 0.6V to (0.87 x VIN)
  • 250kHz to 2.4MHz Adjustable Frequency or SYNC Input
  • Allows All-Ceramic-Capacitor Design
  • SYNCOUT Drives 2nd Regulator 180° Out-of-Phase
  • Prebiased or Monotonic Soft-Start
  • Programmable Soft-Start Time
  • Output Tracking or Sequencing
  • Sourcing and Sinking Output Current
  • Power-Good Output
  • 32-Lead TQFN Package
  • REFIN for DDR-Termination Application

Applications/Uses

  • ASIC/CPU/DSP Core Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • Fiber Power Supplies
  • Network-Power Supplies
  • POL Power Supplies
  • Telecom Power Supplies

Description

The MAX8566 high-efficiency switching regulator delivers up to 10A load current at output voltages from 0.6V to (0.87 x VIN). The IC operates from 2.3V to 3.6V input supplies, making it ideal for point-of-load applications. The total output-voltage set error is less than ±1% over load, line, and temperature.

The MAX8566 operates in pulse-width-modulation (PWM) mode with a 250kHz to 2.4MHz switching frequency range that is programmable by an external resistor. The IC can be synchronized to an external clock in the same frequency range using the SYNC input. The high operating frequency minimizes the size of external components. Using low-RDS(ON) n-channel MOSFETs for both high- and low-side switches maintains high efficiency at both heavy-load and high-switching frequencies.

The MAX8566 employs a voltage-mode control architecture with a high-bandwidth (> 10MHz) error amplifier. The voltage-mode control architecture makes switching frequencies greater than 1MHz possible, achieving all-ceramic-capacitor designs to minimize PC board space. The error amplifier works with Type 3 compensation to fully utilize the bandwidth of the high-frequency switching to obtain fast transient response. Adjustable soft-start time provides flexibility to minimize input startup inrush current. An open-drain, power-good (PWRGD) signal goes high when the output reaches 90% of its regulation point.

The MAX8566 provides a SYNCOUT output to synchronize a second MAX8566 or a second regulator switching 180° out-of-phase with the first to reduce the input ripple current, which consequently reduces the input-capacitance requirements. The MAX8566 also provides an external reference input (REFIN) for output-tracking applications.

The MAX8566 is available in a 32-pin, 5mm x 5mm TQFN package. The MAX8566 and all the required external components fit into a footprint of less than 0.80in².

Simplified Block Diagram

MAX8566: Typical Operating Circuit MAX8566: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .