MAX618

28V, PWM, Step-Up DC-DC Converter

High-Voltage, High Current Step-Up in QSOP Also Offers SEPIC and Flyback Topologies


Please check latest availability status for a specific part variant.

Description

The MAX618 CMOS, PWM, step-up DC-DC converter generates output voltages up to 28V and accepts inputs from +3V to +28V. An internal 2A, 0.3Ω switch eliminates the need for external power MOSFETs while supplying output currents up to 500mA or more. A PWM control scheme combined with Idle Mode™ operation at light loads minimizes noise and ripple while maximizing efficiency over a wide load range. No-load operating current is 500µA, which allows efficiency up to 93%.

A fast 250kHz switching frequency allows the use of small surface-mount inductors and capacitors. A shutdown mode extends battery life when the device is not in use. Adaptive slope compensation allows the MAX618 to accommodate a wide range of input and output voltages with a simple, single compensation capacitor.

The MAX618 is available in a thermally enhanced 16-pin QSOP package that is the same size as an industry-standard 8-pin SO but dissipates up to 1W. An evaluation kit (MAX618EVKIT) is available to help speed designs.
MAX618: Typical Operating Circuit MAX618: Typical Operating Circuit Enlarge+

Key Features

  • Adjustable Output Voltage Up to +28V
  • Up to 93% Efficiency
  • Wide Input Voltage Range (+3V to +28V)
  • Up to 500mA Output Current at +12V
  • 500µA Quiescent Supply Current
  • 3µA Shutdown Current
  • 250kHz Switching Frequency
  • Small 1W, 16-Pin QSOP Package

Applications/Uses

  • Industrial +24V and +28V Systems
  • LCD Displays
  • Palmtop Computers
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX618 328328120.5ResistorInternal0.5381250
QSOP/16
$3.83 @1k
See All Step-Up Switching Regulators (98)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX618EVKIT: Evaluation Kit for the MAX618

CAD Symbols and Footprints

  • MAX618EEE+
  • MAX618EEE+T
  • MAX618EEE/GG8
  • MAX618EEE/GG8-T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
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