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MAX8627

MAX8627

Low VBATT, 20µA IQ, 1MHz Synchronous Boost Converter with True Shutdown

Ideal for DSC Motors and Backup Power

Data Sheet
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Overview

Description

The MAX8627 step-up converter is a high-efficiency, low-quiescent current, synchronous boost converter with True Shutdown™ and inrush current limiting. The MAX8627 generates any boosted output voltage from 3V to 5V from either a 2-cell NiMH/NiCd or a single-cell Li+/Li polymer battery.

Quiescent current is only 20µA (typ), and at light loads the converter pulses only as needed for best efficiency. At higher loads, PWM mode maintains fixed 1MHz operation for lowest noise and ripple.

The MAX8627 includes an internal soft-start to limit inrush current to a maximum of 500mA. Additional features include True Shutdown, internal compensation, and adjustable current limit. The MAX8627 is available in a tiny 3mm x 3mm TDFN package and is ideal for use in handheld devices such as DSCs, PDAs, and smartphones.
MAX8627: Typical Operating Circuit MAX8627: Typical Operating Circuit Enlarge+

Key Features

  • 1MHz PWM Switching Frequency
  • True Shutdown Output
  • Up to 95% Efficiency
  • 1.0A Guaranteed Output Current
  • Soft-Start Eliminates Inrush Current
  • 20µA (typ) Quiescent Current
  • 0.1µA Logic-Controlled Shutdown
  • Internal Synchronous Rectifier
  • Internal Compensation
  • Adjustable Current Limit
  • Low-Noise Antiringing Feature
  • Tiny 14-Pin, 3mm x 3mm, TDFN Package

Applications/Uses

  • Cell Phones, PDAs, MP3 Players
  • DSC Motors and Backup Power
  • Microprocessor/DSP Core Power
  • Portable Handheld Devices

Parametric Specs

Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		IOUT1
(A)		Output Adjust. MethodSwitch TypeSynchronous SwitchingICC
(mA)		Shutdown Mode Supply Current
(µA)		Shutdown Mode Supply Current
(µA)		DC-DC OutputsOper. Freq.
(kHz)		Package/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX8627 0.95.5151ResistorInternalYes0.020.1111000
TDFN/14
$1.28 @1k
See All Step-Up Switching Regulators (97)
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.

Design Resources


MAX8627EVKIT: Evaluation Kit for the MAX8627

Technical Documents

Tutorial 2031 DC-DC Converter Tutorial

Quality and Environmental Data

Product Reliability Reports: MAX8627.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX8627

CAD Symbols and Footprints

  • MAX8627ETD+
  • MAX8627ETD+T
    •

    Quality And Environmental

    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 >
    Environmental Management System >

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    Technical Docs

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    Tutorial 2031 DC-DC Converter Tutorial

    Reference Designs

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    Evaluation Board5346MAX8627EVKIT Evaluation Kit for the MAX8627