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4MHz, Miniature 600mA, Synchronous Step-Down DC-DC Converter with Integrated MOSFETs

High-Efficiency Synchronous Buck Regulator Offers Balance of High Performance, Wide Temperature Range, and Small Size

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 1.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.6
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 4000
Design Tools EE-Sim
Package/Pins TDFN-CU/8
Budgetary
Price (See Notes)
0.71
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 1.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.6
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 4000
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=2405', '')
Package/Pins TDFN-CU/8
Budgetary
Price (See Notes)
0.71

Key Features

  • Minimizes External Components, Reducing Total Cost
    • Synchronous Operation for High Efficiency and Reduced Cost
    • Internal Compensation for Stable Operation at Any Output Voltage
    • All-Ceramic Capacitor Solution
    • 4MHz Operation
    • Only 5 External Components Required
    • Total Solution Size is 12mm2 (Sum of the Components Area)
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 2.7V to 5.5V Input Voltage Range
    • Adjustable 1.5V to 100% VIN Output Voltage Range
    • Delivers Up to 600mA Load Current
    • 100% Duty-Cycle Operation
    • +1%/-0.75% Reference Voltage Accuracy
    • Available in a 2mm x 2mm TDFN Package
  • Reduces Power Dissipation
    • Peak Efficiency 91%
    • Skip Mode for High Light-Load Efficiency
    • Shutdown Current = 0.1µA
  • Operates Reliably
    • Peak Current-Limit Protection
    • Soft-Start Reduces Inrush Current During Startup
    • Built-In Output-Voltage Monitoring (Open-Drain PGOOD Pin)
    • -40°C to +125°C Operation

Applications/Uses

  • Battery-Powered Instruments
  • Distributed Power Systems
  • Point-of-Load Power Supply
  • Standard 5V Rail Supplies

Description

The MAX17620 is a high-frequency, high-efficiency synchronous step-down DC-DC converter with integrated MOSFETs that operates over a 2.7V to 5.5V input voltage range. The device supports up to 600mA load current and 1.5V to 100% VIN output voltage. High-frequency operation enables the use of small, low-cost inductors and capacitors.

The device features selectable PWM/skip mode of operation at light loads and operates at a 4MHz fixed-frequency in PWM mode. Skip mode improves system efficiency at light loads, while PWM mode maintains a constant switching frequency over the entire load. In skip mode, the device draws only 40µA of quiescent current from the supply input. In shutdown mode, the current consumption is reduced to 0.1µA.

The device also features a soft-start feature to reduce the inrush current during startup, and also incorporates an enable (EN) pin to turn on/off the device. An open-drain PGOOD pin provides power-good signal to the system upon achieving successful regulation of the output voltage.

The MAX17620 is available in an 8-pin, 2mm x 2mm TDFN package and operates over the -40°C to +125°C temperature range.

Simplified Block Diagram

MAX17620: Block Diagram MAX17620: Block Diagram 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 .